sup·ple·ment [n. suhp-luh-muhnt; v. suhp-luh-ment]
noun
1. something added to complete a thing, supply a deficiency, orreinforce or extend a whole
.2. a part added to a book, document, etc., to supply additionalor later information, correct errors, or the like.
3. a part, usually of special character, issued as an additionalfeature of a newspaper or other periodical.
4. Geometry . the quantity by which an angle or an arc fallsshort of 180° or a semicircle.
verb (used with object)
5. to complete, add to, or extend by a supplement.
6. To form a supplement or addition to.
7. to supply (a deficiency).
WEIGHT GAINER SUPPLEMENT:
Giant Mega Mass 4000 has a ton of protein-the kind of calories that really count-plus the new improved formula featuring the hottest performance nutrients-ornithine alpha-Ketogutarate(OKG), creatine, 2-carnitine, chromium and more. You cant buy a more powerful, more reliable or more delicious a weight gainers than victory giant Mega Mass 4000.
MUSCLE SUPPLEMENT:
100% Whey Protein
Manufacturer: Optimum Nutrition
100% Whey Protein
Whey protein is the highest in all measures of protein quaility. Our extremely popular protein is produced with domestic Grade A Milk and is low temperature processed to preserve the biologically active microfractions. It is also concentrated, ultrafiltered and isolated using ion exchange and crossflow microfiltration to eliminate nearly all of the cholesterol and lactose making it perfect for low-fat and low carbohydrate diets.Optimum Nutrition offers a very high quality whey protein at an affordable price. Customers consistently rank Optimum Nutrition Whey Protein as one of the best values on the market.
This is is a powerful pharmaceutical grade protein supplement. Each serving delivers 22 grams of high biologically valued protein and just 2 grams of fat.This product contains absolutely no added carbohydrates. Each serving has just 1.5 grams of carbohydrates, making it an excellent choice for those on low carbohydrate diets.
100% Whey Protein is manufactured from non-denatured, specially filtered Whey Protein Concentrate, Ion Exchange Whey Protein Isolate, and Low Molecular Weight Whey Peptides. This mixture provides the highest biological value and absorbability while eliminating the lactose.
This product delivers you the perfect balance of Essential and Non-Essential Amino Acids including a high concentration of Branch Chain Amino Acids. This improves nitrogen retention and muscle growth.
This is an instantized formula that is easy to mix with a spoon, and tastes delicious mixed with either skim milk or water. For added protein, try mixing a scoop of protein with your oatmeal, yogurt, muffins, or pancake recipes.
What's in It?
Serving Size: 1 heaping scoop
Servings per Container: 80
Calories: 110 Calories from fat: 18
Total Fat: 2g
Saturated Fat: 0g
Cholesterol: 50mg
Sodium: 60mg
Potassium: 230mg
Total Carbohydrate: 1.5g
Dietary Fiber: <1g
Sugars: 1g
Protein: 22g
Calcium: 17%
Iron: 2%
Ingredients:
QuadPlex Protein Blend (Ultrafiltered Whey Protein Concentrate, Cross Flow Microfiltration Whey Protein Isolate, Ion Exchange Whey Protein Isolate [All Three Sources Contain Concentrations of Lactoglobulin, alpha-Lactalbumen, Bovine Serum Albumen, Immunoglbulins, Glycomacropeptides, Lactoferrin, Lactoperoxidase, Glycomacropeptides, Lactoferrin, Lactoperoxidase, other closely related Protein Molecules and Glutamine Peptides], Low Molecular Weight and Partially Hydrolyzed Whey Peptides), Artificial Flavor, Acesulfame Potassium, FD and C Red #40.
Suggested use:
Mix 1 heaping scoop with 6 to 8 oz. of water or skim milk. Take 2 to 3 servings per day.
Manufacturer: Optimum Nutrition
100% Whey Protein
Whey protein is the highest in all measures of protein quaility. Our extremely popular protein is produced with domestic Grade A Milk and is low temperature processed to preserve the biologically active microfractions. It is also concentrated, ultrafiltered and isolated using ion exchange and crossflow microfiltration to eliminate nearly all of the cholesterol and lactose making it perfect for low-fat and low carbohydrate diets.Optimum Nutrition offers a very high quality whey protein at an affordable price. Customers consistently rank Optimum Nutrition Whey Protein as one of the best values on the market.
This is is a powerful pharmaceutical grade protein supplement. Each serving delivers 22 grams of high biologically valued protein and just 2 grams of fat.This product contains absolutely no added carbohydrates. Each serving has just 1.5 grams of carbohydrates, making it an excellent choice for those on low carbohydrate diets.
100% Whey Protein is manufactured from non-denatured, specially filtered Whey Protein Concentrate, Ion Exchange Whey Protein Isolate, and Low Molecular Weight Whey Peptides. This mixture provides the highest biological value and absorbability while eliminating the lactose.
This product delivers you the perfect balance of Essential and Non-Essential Amino Acids including a high concentration of Branch Chain Amino Acids. This improves nitrogen retention and muscle growth.
This is an instantized formula that is easy to mix with a spoon, and tastes delicious mixed with either skim milk or water. For added protein, try mixing a scoop of protein with your oatmeal, yogurt, muffins, or pancake recipes.
What's in It?
Serving Size: 1 heaping scoop
Servings per Container: 80
Calories: 110 Calories from fat: 18
Total Fat: 2g
Saturated Fat: 0g
Cholesterol: 50mg
Sodium: 60mg
Potassium: 230mg
Total Carbohydrate: 1.5g
Dietary Fiber: <1g
Sugars: 1g
Protein: 22g
Calcium: 17%
Iron: 2%
Ingredients:
QuadPlex Protein Blend (Ultrafiltered Whey Protein Concentrate, Cross Flow Microfiltration Whey Protein Isolate, Ion Exchange Whey Protein Isolate [All Three Sources Contain Concentrations of Lactoglobulin, alpha-Lactalbumen, Bovine Serum Albumen, Immunoglbulins, Glycomacropeptides, Lactoferrin, Lactoperoxidase, Glycomacropeptides, Lactoferrin, Lactoperoxidase, other closely related Protein Molecules and Glutamine Peptides], Low Molecular Weight and Partially Hydrolyzed Whey Peptides), Artificial Flavor, Acesulfame Potassium, FD and C Red #40.
Suggested use:
Mix 1 heaping scoop with 6 to 8 oz. of water or skim milk. Take 2 to 3 servings per day.
MUSCLE ENHANCER:
CREATINE MONOHYDRATE
Dymatize 100% pure pharmaceutical grade Creatine Monohydrate improves your muscles' performance during high intensity activities such as weight training, running and any other aerobic or Anaerobic exercise. Dymatize uses only the highest quality, purest Creatine available, giving you the ultimate in muscle energy production.
DYMATIZE Creatine Monohydrate has always been processed to an extra fine 180 microns ensuring proper dispersion.
DYMATIZE Creatine Monohydrate is manufactured using only the most advanced techniques and conforms to the strict International Molecular Formula: C4H9N3O2H20.
Laboratory Tested for Quality and Purity.
Suggested Use: As a dietary supplement, add 1 heaping teaspoonful daily to cold water or your favorite beverage. Consult with a physician prior to use if you have any medical condition. Do not use if pregnant or lactating. Keep out of the reach of children.
While using a creatine supplement, be sure to consume ample amounts of water (ideally 120 oz a day) to avoid dehydration.
TESTOSTERONE ENHANCER:
Optimum Nutrition's Tribulus 625 Caps are made with the finest Tribulus Terrestris available. Each capsule contains a 625 mg blend of Tribula Terrestris powder and extract. Tribulus 625 Caps also contain various sterols, flavonoids and other plant compounds that naturally occur in this species.BEYOND THE BASICS
- Made With the Finest Tribulus Terrestris Available
- Each Capsule Contains a 625 mg Blend of Tribulus Terrestris Powder and Extract
- Also Contains Various Sterols, Flavonoids, and Other Plant Compounds That Naturally Occur in This Species
- What is Tribulus?
- Other Names: Puncture vine
Tribulus terrestris is a herb that has been used in the traditional medicine of China and India for centuries.
In the mid-1990s, tribulus terrestris became known in North America after Eastern European Olympic athletes said that taking tribulus helped their performance.
The active compounds in tribulus are called steroidal saponins. Two types, called furostanol glycosides and spirostanol glycosides, appear to be involved with the effects of tribulus. These saponins are found primarily in the leaf.
FAT LOSS SUPPLEMENT:
NEW MAXIMUM HARDCORE XENADRINE® RIPPED™
A dedicated team of supplement experts has formulated this new weight-loss powerhouse – Maximum Hardcore Xenadrine® RIPPED™. The new maximum hardcore liquid formula is designed to help you lose weight to reveal the razor-sharp definition in the hard-earned muscle you’ve trained for. In fact, the potent formula is engineered with key ingredients proven in two clinical studies is designed to help you get absolutely shredded.
HARDCORE WEIGHT-LOSS COMPLEX
In one twelve-week, randomized, double-blind, placebo-controlled human clinical trial,29 individuals took the key ingredient combination (Alchemilla vulgaris extract, Oleaeuropaea extract, Cuminum cyminum extract, Mentha longfolia extract) in new MaximumHardcore Xenadrine® RIPPED™ and lost an average of 20.94 pounds. The placebo grouplost an average of 1.70 pounds. Both groups followed a calorie-reduced diet.
An eight-week clinical trial on human subjects, funded by the makers of MaximumHardcore Xenadrine® RIPPED™, showed that those who used the same key ingredient combination lost 16.50 pounds versus 1.73 pounds for the placebo group. Both groups followed a calorie-reduced diet.
8 TIMES THE WEIGHT LOSS SHOWN IN TWO KEY INGREDIENT CLINICAL STUDIES
Data analysis of the results from both clinical trials on the key ingredients in MaximumHardcore Xenadrine® RIPPED™ showed there is statistical significance for test subjectshaving lost 8 times the weight compared to the placebo subjects.
EXTREME ENERGY FOR AMPLIFIED INTENSITY
Maximum Hardcore Xenadrine® RIPPED™ also contains an ingredient (caffeine[1,3,7-trimethylxanthine]) that’s been shown to increase energy.
* These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.
A dedicated team of supplement experts has formulated this new weight-loss powerhouse – Maximum Hardcore Xenadrine® RIPPED™. The new maximum hardcore liquid formula is designed to help you lose weight to reveal the razor-sharp definition in the hard-earned muscle you’ve trained for. In fact, the potent formula is engineered with key ingredients proven in two clinical studies is designed to help you get absolutely shredded.
HARDCORE WEIGHT-LOSS COMPLEX
In one twelve-week, randomized, double-blind, placebo-controlled human clinical trial,29 individuals took the key ingredient combination (Alchemilla vulgaris extract, Oleaeuropaea extract, Cuminum cyminum extract, Mentha longfolia extract) in new MaximumHardcore Xenadrine® RIPPED™ and lost an average of 20.94 pounds. The placebo grouplost an average of 1.70 pounds. Both groups followed a calorie-reduced diet.
An eight-week clinical trial on human subjects, funded by the makers of MaximumHardcore Xenadrine® RIPPED™, showed that those who used the same key ingredient combination lost 16.50 pounds versus 1.73 pounds for the placebo group. Both groups followed a calorie-reduced diet.
8 TIMES THE WEIGHT LOSS SHOWN IN TWO KEY INGREDIENT CLINICAL STUDIES
Data analysis of the results from both clinical trials on the key ingredients in MaximumHardcore Xenadrine® RIPPED™ showed there is statistical significance for test subjectshaving lost 8 times the weight compared to the placebo subjects.
EXTREME ENERGY FOR AMPLIFIED INTENSITY
Maximum Hardcore Xenadrine® RIPPED™ also contains an ingredient (caffeine[1,3,7-trimethylxanthine]) that’s been shown to increase energy.
* These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.
VITAMIN C:
Vitamin C is a water-soluble vitamin, meaning that your body doesn't store it. We have to get what we need from food, including citrus fruits, broccoli, and tomatoes.
You need vitamin C for the growth and repair of tissues in all parts of your body. It helps the body make collagen, an important protein used to make skin, cartilage, tendons, ligaments, and blood vessels. Vitamin C is needed for healing wounds, and for repairing and maintaining bones and teeth.
Vitamin C is an antioxidant, along with vitamin E, beta-carotene, and many other plant-based nutrients. Antioxidants block some of the damage caused by free radicals, substances that damage DNA. The build-up of free radicals over time may contribute to the aging process and the development of health conditions such as cancer, heart disease, and arthritis.
It' s rare to be seriously deficient in vitamin C, although evidence suggests that many people may have low levels of vitamin C. Smoking cigarettes lowers the amount of vitamin C in the body, so smokers are at a higher risk of deficiency.
Signs of vitamin deficiency include dry and splitting hair; gingivitis (inflammation of the gums) and bleeding gums; rough, dry, scaly skin; decreased wound-healing rate, easy bruising; nosebleeds; and a decreased ability to ward off infection. A severe form of vitamin C deficiency is known as scurvy.
Low levels of vitamin C have been associated with a number of conditions, including high blood pressure, gallbladder disease, stroke, some cancers, and atherosclerosis, the build-up plaque in blood vessels that can lead to heart attack and stroke. Getting enough vitamin C from your diet -- by eating lots of fruit and vegetables -- may help reduce the risk of developing some of these conditions. There is no conclusive evidence that taking vitamin C supplements will help or prevent any of these conditions.
Vitamin C plays a role in protecting against the following:
Heart Disease
Results of scientific studies on whether vitamin C is helpful for preventing heart attack or stroke are mixed. Vitamin C doesn't lower cholesterol levels or reduce the overall risk of heart attack, but evidence suggests that it may help protect arteries against damage.
Some studies -- though not all -- suggest that vitamin C, acting as an antioxidant, can slow down the progression of atherosclerosis (hardening of the arteries). It helps prevent damage to LDL ("bad") cholesterol, which then builds up as plaque in the arteries and can cause heart attack or stroke. Other studies suggest that vitamin C may help keep arteries flexible.
In addition, people who have low levels of vitamin C may be more likely to have a heart attack, stroke, or peripheral artery disease, all potential results of having atherosclerosis. Peripheral artery disease is the term used to describe atherosclerosis of the blood vessels to the legs. This can lead to pain when walking, known as intermittent claudication. But there is no evidence that taking vitamin C supplements will help.
The best thing to do is get enough vitamin C through your diet. That way, you also get the benefit of other antioxidants and nutrients contained in food. If you have low levels of vitamin C and have trouble getting enough through the foods you eat, ask your doctor about taking a supplement.
High Blood Pressure
Population based studies (which involve observing large groups of people over time) suggest that people who eat foods rich in antioxidants, including vitamin C, have a lower risk of high blood pressure than people who have poorer diets. Eating foods rich in vitamin C is important for your overall health, especially if you are at risk for high blood pressure. The diet physicians most frequently recommend for treatment and prevention of high blood pressure, known as the DASH (Dietary Approaches to Stop Hypertension) diet, includes lots of fruits and vegetables, which are loaded with antioxidants.
Common Cold
Despite the popular belief that vitamin C can cure the common cold, the scientific evidence doesn't support the notion. Taking vitamin C supplements regularly (not just at the beginning of a cold) produces only a small reduction in the duration of a cold (about 1 day). The only other piece of evidence supporting vitamin C for preventing colds comes from studies examining people exercising in extreme environments (athletes such as skiers and marathon runners, and soldiers in the Arctic). In these studies, vitamin C did seem to reduce the risk of getting a cold.
Cancer
Results of many population based studies (evaluating groups of people over time) suggest that eating foods rich in vitamin C may be associated with lower rates of cancer, including skin cancer, cervical dysplasia (changes to the cervix which may be cancerous or precancerous, picked up by pap smear), and, possibly, breast cancer. But these foods also contain many beneficial nutrients and antioxidants, not only vitamin C, so it's impossible to say for certain that vitamin C is protecting against cancer. Taking vitamin C supplements, on the other hand, has not been shown to have any helpful effect.
In addition, there is no evidence that taking large doses of vitamin C once diagnosed with cancer will help your treatment. Moreover, some doctors are concerned that large doses of antioxidants from supplements could interfere with chemotherapy medications. More research is needed. If you are undergoing chemotherapy, talk to your doctor before taking vitamin C or any supplement.
Osteoarthritis
Vitamin C is essential for the body to make collagen, which is a part of normal cartilage. Cartilage is destroyed in osteoarthritis (OA), putting pressure on bones and joints. In addition, some researchers think free radicals -- molecules produced by the body that can damage cells and DNA -- may also be involved in the destruction of cartilage. Antioxidants such as vitamin C appear to limit the damage caused by free radicals. However, that said, no evidence suggests that taking vitamin C supplements will help treat or prevent OA. What the evidence does show is that people who eat diets rich in vitamin C are less likely to be diagnosed with arthritis.
Taking nonsteroidal anti-inflammatory drugs can lower your levels of vitamin C. If you take these drugs regularly for OA, you might want to take a vitamin C supplement.
Age-related Macular Degeneration
Vitamin C (500 mg) appears to work with other antioxidants, including zinc (80 mg), beta-carotene (15 mg), and vitamin E (400 IU) to protect the eyes against developing macular degeneration (AMD), the leading cause of legal blindness in people over 55 in the United States. The people who seem to benefit are those with advanced AMD. It isn't known whether this combination of nutrients helps prevent AMD or is beneficial for people with less advanced AMD. This combination includes a high dose of zinc, which should be taken only under a doctor' s supervision.
Pre-eclampsia
Some studies suggest that taking vitamin C along with vitamin E may help prevent pre-eclampsia in women who are at high risk. Pre-eclampsia, characterized by high blood pressure and too much protein in the urine, is a common cause of premature births. Not all studies agree, however.
Asthma
Studies are mixed when it comes to the effect of vitamin C on asthma. Some show that low levels of vitamin C are more common in people with asthma, leading some researchers to think that low levels of vitamin C might increase the risk for this condition. Other studies seem to show that vitamin C may help reduce symptoms of exercise-induced asthma.
Other
Although the information is limited, studies suggest that vitamin C may also be helpful for:
Available Forms:You can purchase either natural or synthetic vitamin C, also called ascorbic acid, in a variety of forms. Tablets, capsules, and chewables are probably the most popular forms, but vitamin C also comes in powdered crystalline, effervescent, and liquid forms. Vitamin C comes in doses ranging from 25 - 1,000 mg.
"Buffered" vitamin C is also available if you find that regular ascorbic acid upsets your stomach. An esterified form of vitamin C is also available, which may be easier on the stomach for those who are prone to heartburn.
How to Take It:The best way to take vitamin C supplements is 2 - 3 times per day, with meals, depending on the dosage. Some studies suggest that adults should take 250 - 500 mg twice a day for any benefit. Talk to your doctor before taking more than 1,000 mg of vitamin C on a daily basis and before giving vitamin C to a child.
Daily intake of dietary vitamin C (according to the National Academy of Sciences) is listed below.
Pediatric
The dose recommended to prevent or treat many of the conditions mentioned in the Uses section is often 500 - 1,000 mg per day.
Precautions:Because of the potential for side effects and interactions with medications, you should take dietary supplements only under the supervision of a knowledgeable health care provider.
Vitamin C supplements have a diuretic effect, meaning the help the body get rid of excess fluid. Be sure to drink plenty of fluids when taking them.
Most commercial vitamin C is made from corn. People sensitive to corn should look for alternative sources, such as sago palm.
Vitamin C increases the amount of iron absorbed from foods. People with hemochromatosis, an inherited condition where too much iron builds up in the body, should not take vitamin C supplements.
Vitamin C is generally considered safe because your body gets rid of what it does not use. But at high doses (more than 2,000 mg daily) it can cause diarrhea, gas, or stomach upset. If you experience these side effects, lower the dose of vitamin C.
People with kidney problems should talk to their doctor before taking vitamin C.
People who smoke or use nicotine patches may need more vitamin C because nicotine makes vitamin C less effective in the body.
Infants born to mothers taking 6,000 mg or more of vitamin C may develop rebound scurvy because their intake of vitamin C drops after birth. If you are pregnant, talk to your doctor before taking more than 1,000 mg of vitamin C.
Vitamin C may raise blood sugar levels in people with diabetes. In older women with diabetes, doses of vitamin C above 300 mg per day were associated with an increased risk of death from heart disease.
Taking vitamin C right before or after angioplasty may interfere with healing.
If you are being treated for cancer, talk to your oncologist before taking vitamin C. Vitamin C may potentially interact with some chemotherapy drugs.
Possible Interactions:If you are being treated with any of the following medications, you should not use vitamin C supplements without first talking to your health care provider:
Aspirin and nonsteroidal anti-inflammatory drugs (NSAIDs) -- Both aspirin and NSAIDs can lower the amount of vitamin C in the body because they cause more of the vitamin to be lost in urine. In addition, high doses of vitamin C can cause more of these drugs to stay in the body, raising the levels in your blood. Some very early research suggests that vitamin C might help protect against stomach upset that aspirin and NSAIDs can cause. If you regularly take aspirin or NSAIDs, talk to your doctor before taking more than the recommended daily allowance of vitamin C.
Acetaminophen (Tylenol) -- High doses of vitamin C may lower the amount of acetaminophen passed in urine, which could cause the levels of this drug in your blood to rise.
Aluminum-containing antacids -- Vitamin C can increase the amount of aluminum your body absorbs, which could cause the side effects of these medications to be worse. Aluminum-containing antacids include Maalox and Gaviscon.
Barbiturates -- Barbiturates may decrease the effects of vitamin C. These drugs include phenobarbital (Luminal), pentobarbital (Nembutal), and seconobarbital (Seconal).
Chemotherapy drugs -- As an antioxidant, vitamin C may interfere with the effects of some drugs taken for chemotherapy. However, some researchers speculate that vitamin C might help make chemotherapy more effective. If you are undergoing chemotherapy, do not take vitamin C or any other supplement without talking to your oncologist.
Oral contraceptives (birth control pills) and hormone replacement therapy (HRT) -- Vitamin C can cause a rise in estrogen levels when taken with these drugs. Oral estrogens can also decrease the effects of vitamin C in the body.
Protease inhibitors -- Vitamin C appears to slightly lower levels of indinavir (Crixivan), a medication used to treat HIV and AIDS.
Tetracycline -- Some evidence suggests that taking vitamin C with the antibiotic tetracycline may increase the levels of this medication. It may also decrease the effects of vitamin C in the body. Other antibiotics in the same family include minocycline (Minocin) and doxycycline (Vibramycin).
Warfarin (Coumadin) -- There have been rare reports of vitamin C interfering with the effectiveness of this blood thinning medication. In recent follow-up studies, no effect was found with doses of vitamin C up to 1,000 mg per day. However, if you take warfarin or another blood thinner, talk to your doctor before taking vitamin C or any other supplement.
Alternative Names:Ascorbic acid
Read more: http://www.umm.edu/altmed/articles/vitamin-c-000339.htm#ixzz1med6wGt0
You need vitamin C for the growth and repair of tissues in all parts of your body. It helps the body make collagen, an important protein used to make skin, cartilage, tendons, ligaments, and blood vessels. Vitamin C is needed for healing wounds, and for repairing and maintaining bones and teeth.
Vitamin C is an antioxidant, along with vitamin E, beta-carotene, and many other plant-based nutrients. Antioxidants block some of the damage caused by free radicals, substances that damage DNA. The build-up of free radicals over time may contribute to the aging process and the development of health conditions such as cancer, heart disease, and arthritis.
It' s rare to be seriously deficient in vitamin C, although evidence suggests that many people may have low levels of vitamin C. Smoking cigarettes lowers the amount of vitamin C in the body, so smokers are at a higher risk of deficiency.
Signs of vitamin deficiency include dry and splitting hair; gingivitis (inflammation of the gums) and bleeding gums; rough, dry, scaly skin; decreased wound-healing rate, easy bruising; nosebleeds; and a decreased ability to ward off infection. A severe form of vitamin C deficiency is known as scurvy.
Low levels of vitamin C have been associated with a number of conditions, including high blood pressure, gallbladder disease, stroke, some cancers, and atherosclerosis, the build-up plaque in blood vessels that can lead to heart attack and stroke. Getting enough vitamin C from your diet -- by eating lots of fruit and vegetables -- may help reduce the risk of developing some of these conditions. There is no conclusive evidence that taking vitamin C supplements will help or prevent any of these conditions.
Vitamin C plays a role in protecting against the following:
Heart Disease
Results of scientific studies on whether vitamin C is helpful for preventing heart attack or stroke are mixed. Vitamin C doesn't lower cholesterol levels or reduce the overall risk of heart attack, but evidence suggests that it may help protect arteries against damage.
Some studies -- though not all -- suggest that vitamin C, acting as an antioxidant, can slow down the progression of atherosclerosis (hardening of the arteries). It helps prevent damage to LDL ("bad") cholesterol, which then builds up as plaque in the arteries and can cause heart attack or stroke. Other studies suggest that vitamin C may help keep arteries flexible.
In addition, people who have low levels of vitamin C may be more likely to have a heart attack, stroke, or peripheral artery disease, all potential results of having atherosclerosis. Peripheral artery disease is the term used to describe atherosclerosis of the blood vessels to the legs. This can lead to pain when walking, known as intermittent claudication. But there is no evidence that taking vitamin C supplements will help.
The best thing to do is get enough vitamin C through your diet. That way, you also get the benefit of other antioxidants and nutrients contained in food. If you have low levels of vitamin C and have trouble getting enough through the foods you eat, ask your doctor about taking a supplement.
High Blood Pressure
Population based studies (which involve observing large groups of people over time) suggest that people who eat foods rich in antioxidants, including vitamin C, have a lower risk of high blood pressure than people who have poorer diets. Eating foods rich in vitamin C is important for your overall health, especially if you are at risk for high blood pressure. The diet physicians most frequently recommend for treatment and prevention of high blood pressure, known as the DASH (Dietary Approaches to Stop Hypertension) diet, includes lots of fruits and vegetables, which are loaded with antioxidants.
Common Cold
Despite the popular belief that vitamin C can cure the common cold, the scientific evidence doesn't support the notion. Taking vitamin C supplements regularly (not just at the beginning of a cold) produces only a small reduction in the duration of a cold (about 1 day). The only other piece of evidence supporting vitamin C for preventing colds comes from studies examining people exercising in extreme environments (athletes such as skiers and marathon runners, and soldiers in the Arctic). In these studies, vitamin C did seem to reduce the risk of getting a cold.
Cancer
Results of many population based studies (evaluating groups of people over time) suggest that eating foods rich in vitamin C may be associated with lower rates of cancer, including skin cancer, cervical dysplasia (changes to the cervix which may be cancerous or precancerous, picked up by pap smear), and, possibly, breast cancer. But these foods also contain many beneficial nutrients and antioxidants, not only vitamin C, so it's impossible to say for certain that vitamin C is protecting against cancer. Taking vitamin C supplements, on the other hand, has not been shown to have any helpful effect.
In addition, there is no evidence that taking large doses of vitamin C once diagnosed with cancer will help your treatment. Moreover, some doctors are concerned that large doses of antioxidants from supplements could interfere with chemotherapy medications. More research is needed. If you are undergoing chemotherapy, talk to your doctor before taking vitamin C or any supplement.
Osteoarthritis
Vitamin C is essential for the body to make collagen, which is a part of normal cartilage. Cartilage is destroyed in osteoarthritis (OA), putting pressure on bones and joints. In addition, some researchers think free radicals -- molecules produced by the body that can damage cells and DNA -- may also be involved in the destruction of cartilage. Antioxidants such as vitamin C appear to limit the damage caused by free radicals. However, that said, no evidence suggests that taking vitamin C supplements will help treat or prevent OA. What the evidence does show is that people who eat diets rich in vitamin C are less likely to be diagnosed with arthritis.
Taking nonsteroidal anti-inflammatory drugs can lower your levels of vitamin C. If you take these drugs regularly for OA, you might want to take a vitamin C supplement.
Age-related Macular Degeneration
Vitamin C (500 mg) appears to work with other antioxidants, including zinc (80 mg), beta-carotene (15 mg), and vitamin E (400 IU) to protect the eyes against developing macular degeneration (AMD), the leading cause of legal blindness in people over 55 in the United States. The people who seem to benefit are those with advanced AMD. It isn't known whether this combination of nutrients helps prevent AMD or is beneficial for people with less advanced AMD. This combination includes a high dose of zinc, which should be taken only under a doctor' s supervision.
Pre-eclampsia
Some studies suggest that taking vitamin C along with vitamin E may help prevent pre-eclampsia in women who are at high risk. Pre-eclampsia, characterized by high blood pressure and too much protein in the urine, is a common cause of premature births. Not all studies agree, however.
Asthma
Studies are mixed when it comes to the effect of vitamin C on asthma. Some show that low levels of vitamin C are more common in people with asthma, leading some researchers to think that low levels of vitamin C might increase the risk for this condition. Other studies seem to show that vitamin C may help reduce symptoms of exercise-induced asthma.
Other
Although the information is limited, studies suggest that vitamin C may also be helpful for:
- Boosting immune system function
- Maintaining healthy gums
- Improving vision for those with uveitis (an inflammation of the middle part of the eye)
- Treating allergy-related conditions, such as asthma, eczema, and hay fever (called allergic rhinitis)
- Reducing effects of sun exposure, such as sunburn or redness (called erythema)
- Alleviating dry mouth, particularly from antidepressant medications (a common side effect from these drugs)
- Healing burns and wounds
- Decreasing blood sugar in people with diabetes
- Some viral conditions, including mononucleosis -- Although scientific evidence is lacking, some doctors may suggest high-dose vitamin C to treat some viruses
Available Forms:You can purchase either natural or synthetic vitamin C, also called ascorbic acid, in a variety of forms. Tablets, capsules, and chewables are probably the most popular forms, but vitamin C also comes in powdered crystalline, effervescent, and liquid forms. Vitamin C comes in doses ranging from 25 - 1,000 mg.
"Buffered" vitamin C is also available if you find that regular ascorbic acid upsets your stomach. An esterified form of vitamin C is also available, which may be easier on the stomach for those who are prone to heartburn.
How to Take It:The best way to take vitamin C supplements is 2 - 3 times per day, with meals, depending on the dosage. Some studies suggest that adults should take 250 - 500 mg twice a day for any benefit. Talk to your doctor before taking more than 1,000 mg of vitamin C on a daily basis and before giving vitamin C to a child.
Daily intake of dietary vitamin C (according to the National Academy of Sciences) is listed below.
Pediatric
- Birth - 6 months: 40 mg (Adequate intake)
- Infants 6 - 12 months: 50 mg (Adequate intake)
- Children 1 - 3 years: 15 mg
- Children 4 - 8 years: 25 mg
- Children 9 - 13 years: 45 mg
- Adolescent girls 14 - 18 years: 65 mg
- Adolescent boys 14 - 18 years: 75 mg
- Men over 18 years: 90 mg
- Women over 18 years: 75 mg
- Pregnant women 14 - 18 years: 80 mg
- Pregnant women over 18 years: 85 mg
- Breastfeeding women 14 - 18 years: 115 mg
- Breastfeeding women over 18 years: 120 mg
The dose recommended to prevent or treat many of the conditions mentioned in the Uses section is often 500 - 1,000 mg per day.
Precautions:Because of the potential for side effects and interactions with medications, you should take dietary supplements only under the supervision of a knowledgeable health care provider.
Vitamin C supplements have a diuretic effect, meaning the help the body get rid of excess fluid. Be sure to drink plenty of fluids when taking them.
Most commercial vitamin C is made from corn. People sensitive to corn should look for alternative sources, such as sago palm.
Vitamin C increases the amount of iron absorbed from foods. People with hemochromatosis, an inherited condition where too much iron builds up in the body, should not take vitamin C supplements.
Vitamin C is generally considered safe because your body gets rid of what it does not use. But at high doses (more than 2,000 mg daily) it can cause diarrhea, gas, or stomach upset. If you experience these side effects, lower the dose of vitamin C.
People with kidney problems should talk to their doctor before taking vitamin C.
People who smoke or use nicotine patches may need more vitamin C because nicotine makes vitamin C less effective in the body.
Infants born to mothers taking 6,000 mg or more of vitamin C may develop rebound scurvy because their intake of vitamin C drops after birth. If you are pregnant, talk to your doctor before taking more than 1,000 mg of vitamin C.
Vitamin C may raise blood sugar levels in people with diabetes. In older women with diabetes, doses of vitamin C above 300 mg per day were associated with an increased risk of death from heart disease.
Taking vitamin C right before or after angioplasty may interfere with healing.
If you are being treated for cancer, talk to your oncologist before taking vitamin C. Vitamin C may potentially interact with some chemotherapy drugs.
Possible Interactions:If you are being treated with any of the following medications, you should not use vitamin C supplements without first talking to your health care provider:
Aspirin and nonsteroidal anti-inflammatory drugs (NSAIDs) -- Both aspirin and NSAIDs can lower the amount of vitamin C in the body because they cause more of the vitamin to be lost in urine. In addition, high doses of vitamin C can cause more of these drugs to stay in the body, raising the levels in your blood. Some very early research suggests that vitamin C might help protect against stomach upset that aspirin and NSAIDs can cause. If you regularly take aspirin or NSAIDs, talk to your doctor before taking more than the recommended daily allowance of vitamin C.
Acetaminophen (Tylenol) -- High doses of vitamin C may lower the amount of acetaminophen passed in urine, which could cause the levels of this drug in your blood to rise.
Aluminum-containing antacids -- Vitamin C can increase the amount of aluminum your body absorbs, which could cause the side effects of these medications to be worse. Aluminum-containing antacids include Maalox and Gaviscon.
Barbiturates -- Barbiturates may decrease the effects of vitamin C. These drugs include phenobarbital (Luminal), pentobarbital (Nembutal), and seconobarbital (Seconal).
Chemotherapy drugs -- As an antioxidant, vitamin C may interfere with the effects of some drugs taken for chemotherapy. However, some researchers speculate that vitamin C might help make chemotherapy more effective. If you are undergoing chemotherapy, do not take vitamin C or any other supplement without talking to your oncologist.
Oral contraceptives (birth control pills) and hormone replacement therapy (HRT) -- Vitamin C can cause a rise in estrogen levels when taken with these drugs. Oral estrogens can also decrease the effects of vitamin C in the body.
Protease inhibitors -- Vitamin C appears to slightly lower levels of indinavir (Crixivan), a medication used to treat HIV and AIDS.
Tetracycline -- Some evidence suggests that taking vitamin C with the antibiotic tetracycline may increase the levels of this medication. It may also decrease the effects of vitamin C in the body. Other antibiotics in the same family include minocycline (Minocin) and doxycycline (Vibramycin).
Warfarin (Coumadin) -- There have been rare reports of vitamin C interfering with the effectiveness of this blood thinning medication. In recent follow-up studies, no effect was found with doses of vitamin C up to 1,000 mg per day. However, if you take warfarin or another blood thinner, talk to your doctor before taking vitamin C or any other supplement.
Alternative Names:Ascorbic acid
- Reviewed last on: 7/7/2011
- Steven D. Ehrlich, NMD, Solutions Acupuncture, a private practice specializing in complementary and alternative medicine, Phoenix, AZ. Review provided by VeriMed Healthcare Network.
Read more: http://www.umm.edu/altmed/articles/vitamin-c-000339.htm#ixzz1med6wGt0