> ... total diet replacement (825–853 kcal/day formula diet for 3–5 months), stepped food reintroduction (2–8 weeks) ...
That sounds to me like participants were given a professionally prepared formula to consume instead of food, so the calorie counts might be that accurate.
I think in the previous post that was on HN about this they were interviewing a lady that said she was eating some powder that "had all the nutrients", which sounds like something similar to Soylent.
There's a keto version called keto chow. There are recipes online as well as pre-mixed packages to buy. I don't know that the study used this exactly, but it's the same idea.
> ... total diet replacement (825–853 kcal/day formula diet for 3–5 months), stepped food reintroduction (2–8 weeks) ...
That sounds to me like participants were given a professionally prepared formula to consume instead of food, so the calorie counts might be that accurate.