From vitamin D to iron, doctor reveals 10 vitamin supplements that may do more harm than good

Global wellness expert Dr Eric Berg warns that many common synthetic vitamins and minerals can harm health. He advises against synthetic Vitamin A, beta-carotene, folic acid, B12, calcium carbonate, ferrous sulfate, magnesium oxide, Vitamin D2, excessive omega-6 oils, and isolated copper. Berg stresses that nutrients are best absorbed from whole foods. Supplements should be used with caution.