Where do you see that? It only claims it's a meal substitute, which it is. The only other recommendation I could find was this:

> As a nutritionally complete food source, Soylent should be considered a food product just like any other. You can include Soylent in your diet for as long as you’d like, in any amount that suits your needs. There is no right or wrong amount of Soylent to eat - the whole idea is to find a balance that works for you.