There is little evidence to suggest that multivitamins benefit health in a measurable way for the average healthy person, according to NPR. Nutritious food is the best source for vitamins and minerals, says the American Heart Association.
A multivitamin or other supplement can prove useful for women of child-bearing age, as reported in the Huffington Post. The same is true for women who are going through or have gone through menopause.
There are certain populations that have vitamin deficiencies that require supplementation, as reported by NPR; however, a well-nourished adult does not need vitamin supplements. The best source of vitamins and minerals is fresh fruits and vegetables, according to Women's Health.