I am the lead medical author of a published review on Vitamin and Mineral Supplements. Please read the full article by clicking on this link:
What Are the Benefits to Vitamin and Mineral Supplements?
The benefits of vitamins and minerals can be obtained by either eating more foods rich in vitamins and minerals (like vegetables, nuts, seeds, and whole grains) or by taking supplements. The benefits can include increased energy, healthier hair and skin, and prevention of heart disease, cancer, and other chronic diseases. For example, research shows that vitamins A, C, and E may play a role in the prevention of cancer. Minerals, such as iodine and selenium, are essential for normal thyroid function... read more: www.emedicinehealth.com/vitamin_and_mineral_supplements/article_em.htm#what_facts_should_i_know_about_vitamins_and_minerals