Do we need food supplements

The food supplements industry is coming up with new “essential” supplements every now and then. The underlying premise behind these food supplements (including Vitamins, Proteins, Omega 3 oil etc.) is that human body needs them and cannot produce them on its own. If the body can convert mass into energy, essentially the function of a nuclear reaction, it could also be converting one type of element into another. Most of the world lived on just basic grains (wheat and rice) during most of the history. If food supplements were so important, and body could not produce it from grains, how could those people maintain healthy and strong bodies?

Though generalization would be an overstatement, Latest studies on multivitamins say that these are a waste of money and high doses of B12 can be dangerous and so is  Omega 3 and now, the serious side effects of Protein foods, which people are eating heavily for the last 2 decades.