B3 - example that food is medicine
Niacin was long considered a mere part of the diet until it was discovered that its deficiency causes skin, digestive, and mental problems known as pellagra. Doctor Goldberger proved that the cause of this disease is not an infection but a one-sided diet without vitamin B3. He conducted an experiment on himself and his colleagues, who consumed exclusively poor diets and began to show symptoms of pellagra. However, when they added nutrients rich in niacin to their diet, the symptoms disappeared. In 1937, niacin was isolated from the liver, confirming its importance and nutritional value.
