Drinking water != drinking a semi-nutricional mix with uncertain (and most possibly bad) long-term implications and fantasising I have superpowers, from super-concentration to curing dandruff and long-term eye diseases in 4/9 days of trying it (while feeling like the "million dollar man")...
I can get by on a power-mix like that for months. Maybe years. Heck, I can get of just Big Mac and Coke, or Beer and Tomatoes for months.
But the medium and long term health effects? I seriously doubt they would be any good, and wouldn't believe any random internet post without a proper study, from a reliable source, with at least 10 people and a control group.
The "cured dandruff, lost weight, increased mental capacity and cured eye-disease"? You can find similar and bolder claims in BS new-age groups touting Orgone, Pyramid Power, Spiruline and what have you. They are a dime-a-dozen.
That this takes the form of "science" (with basic vitamins, proteins and stuff taken into account) doesn't mean much. Much of the perpetual machine etc folklore also take the form of science.
(Not to mention these posts could be the first steps in a viral marketing effort to start selling the thing. Next step: the same mix on sale).