Comment by Aurornis

This is an elemental diet, which is not new. An elemental diet uses amino acids, fats, sugars, and vitamins to provide the elements of a human diet (hence the name) without whole or partial proteins, fiber, and other things that gut bacteria like to eat. The bacterial overgrowth subsides because you’re not giving it the food it wants. This means you can’t eat anything other than this diet mix for 2 weeks, no exceptions.

The only novel part about this branded one is that it’s palatable. That’s actually a big advantage because a plain elemental diet tastes so bad that it’s hard to tolerate.

You can search for DIY elemental diet recipes and there are several sources for the amino acid blends they use. People report some success, if they can tolerate the taste.