Vitamins, minerals, fish oils… the list of nutritional supplements you can buy keeps growing. Some are worth it, some aren’t. We sift the evidence for you IN 1911, Polish chemist Casimir Funk made one of the most influential biomedical discoveries of all time. He learned that a disease called beriberi affected those who ate a diet of mainly white rice, but not those who ate mostly brown rice. He isolated a chemical from rice bran,…