Can Vitamins Prevent Disease?

The vitamin supplement industry is worth millions of pounds every year, and the Internet is full of suggestions that vitamins can prevent or cure all kinds of diseases. There is research under way all around the world looking at the role of vitamins in health and disease, and while there is some evidence about where vitamins can and cannot help, some claims are just based on anecdote and assumption, and should be taken with a pinch of (vitamin enriched?) salt.
Even where there is scientific evidence, using vitamins to treat specific diseases, especially at doses above recommended daily allowances, should only be done at the recommendation of a doctor.
Vitamins and Cancer/Heart Disease
Following studies of people with diets rich in fruit and vegetables showing lower rates of cancer and heart disease, researchers studied a group of 161,808 women taking multivitamin supplements for eight years and saw no reduction in cancer and heart disease. This might mean that the vitamins in food are ‘better’ than the vitamins in supplements (see ‘Are Vitamins in Food Better Than Supplements?’) or it might mean that the people who ate a lot of fruit and vegetables were also the kind of people who exercised more and ate less meat.Vitamin B2 and Migraine
In a study, Vitamin B2 (riboflavin) supplements at 400 mg per day halved the number of migraines in some people.Vitamin B6 and Pre-Menstrual Syndrome
Vitamin B6 (pyridoxine) at doses of 50 to 100 mg can help with the symptoms of pre-menstrual syndrome. Higher doses are unlikely to be any more effective and vitamin B6 at doses above 200 mg per day can cause tingling in hands and feet and may lead to irreversible nerve damage.Folic Acid (Vitamin B9) and Neural Tube Defects
Taking folic acid before conception and during pregnancy can reduce the risk of the unborn child having neural tube defects – problems with the spinal cord, skull and brain.Folic Acid (Vitamin B9) and Heart Disease/Stroke
There is mixed evidence for and against the suggestion that taking a folic acid supplement can reduce the risk of heart disease – some evidence suggests that it could increase the risk. There is some evidence that folic acid can reduce the risk of stroke.Vitamin B12 and Anaemia
Injected vitamin B12 is used to treat pernicious anaemia, a form of anaemia caused by the inability to absorb B12 from food.B Vitamins and Diabetic Neuropathy
Some diabetics are low in B vitamins – this may be related to reduced absorption of B vitamins caused by the antidiabetic drugs. B vitamins, including vitamin B12, may help prevent and treat diabetic neuropathy.Vitamin C and the Common Cold
There is no evidence that high doses of vitamin C prevent colds, though they may reduce the length and severity slightly. High doses of vitamin C can cause indigestion, diarrhoea and kidney stones.Vitamin D and Multiple Sclerosis
Results from research in 2009 suggested that a vitamin D supplement during pregnancy and childhood, or careful exposure to the sun, could prevent multiple sclerosis. However, this is still early research.Vitamin E and Heart DiseaseThough some studies have shown that vitamin E supplements reduce the risk of heart disease, other studies have not shown the same results.
- Why Do We Need Vitamins
- The Myths About Vitamins
- How Were Vitamins Discovered?
- Do Animals Need Vitamin Supplements?
- What Are Fat Soluble Vitamins?
- How Drugs and Foods Interact With Vitamins
- The Effect of Caffeine on Vitamin Absorption
- Which are the Most Nutrient Rich Foods?
- Vitamins in Your Diet
- Pros and Cons of Vitamin Supplements
- What are Vitamins?
Re: What Are Fat Soluble Vitamins?
Very good answer and very simple fat soluble vitamin
Re: Can Our Bodies Make Our Own Vitamins?
@paty I am in the same boat with the digestive system. Usually a quick 1 day juice/water fast will strengthen my…
Re: Can Our Bodies Make Our Own Vitamins?
Hi ..a friend of mine told me that our body can produce vitamin B which I'm skeptical about.As far as I know our body…
Re: Beri Beri and Pellagra: Deficiency of Vitamins B1, B3
My friend's Chihuahua was suddenly paralyzed. The vet suggested expensive back surgery, expensive…
Re: Why Do We Need Vitamins
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Re: Why Do We Need Vitamins
This is a very good and helpful resource.
Re: The Effect of Caffeine on Vitamin Absorption
"Try drinking an extra glass of milk every day also to keep calcium levels healthy" only in dreams milk is…
Re: What Does Vitamin A do?
I love this site is educating and helpful
Re: Q & A: Which Foods Prevent These Deficiencies?
This information above helped me a lot when I was struggling with my Ancillary health care assignment.…
Re: Q & A: Which Foods Prevent These Deficiencies?
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