It is really easy to figure things out at the cellular level because you can easily build experiments containing controls and the turn-around time on iterations

It is really easy to figure things out at the cellular level because you can easily build experiments containing controls and the turn-around time on iterations is fast. The human body has trillions of cells and even more symbiotic bacteria. We are clueless how the system functions as a whole. We know some simple things (iron and calcium compete for absorption in the intestine), but only the "big" stuff. Maybe if you eat 20% of your RDA of Vitamin E at every meal, it makes your intestines toxic to a particular strand of gut biota that regulates half your body[1]. The space we know nothing about is huge, and jumping in with a product for the masses with so little respect for that is, IMO, very dangerous. 1. There is evidence that people suffering metabolic syndrome have significantly different gut biota than those who aren't and when "normal" biota is reintroduced, their health improves. My hypothetical is not an impossibility.