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1. Multivitamins/Minerals
Most people can benefit from taking a multiple daily to fill in any nutritional gaps. These supplements, however, are not meant to 'cure' diseases.
2. Sports Nutrition
For athletes, these products are helpful in endurance events for powders / formulas quick fueling in a race. Though fairly economical and extremely convenient, sports nutrition products aren't truly necessary for an athlete's regimen. Training effects, such as muscle recovery, can be achieved with real food.
3. Calcium
Supplementing with calcium is recommended, particularly for menopausal women, to protect against osteoporosis. Calcium may also protect against cancer of the colon.
4. B Vitamins
Most well-conducted trials of folic acid/vitamin B supplementation have shown that they confer no protection against heart disease, stroke, or cognitive decline.
5. Vitamin C
Supplementing with vitamin C has no effect on longevity of colds, according to recent studies on antioxidants. In doses exceeding the daily recommended dietary allowance, supplemental vitamin C may have a harmful effect on the immune system.
