The only reason Soylent have gotten away with it for so long is that the FDA rules for this category of product haven't been written yet.
A product shouldn't make people sick when used as intended. So if a product is intended to be consumed as 100% of your diet, it MUST:
- contain all known macro- and micro-nutrients necessary for human health
- contain nothing that makes you sick when you eat it all the time
Soylent failed on both counts:
- Early formulations lacked selenium. Beta testers duly developed symptoms of selenium deficiency.
- The latest formulation contained algae. Customers duly got sick from consuming more of this kind of algae than humans have ever consumed before.
The first mistake might be excused as a beginner's error and a learning experience. But they didn't learn. Luckily, Soylent lives in the land of class action lawsuits. The lawyers are gonna shut these jokers down.