One thing with Sarcev that I noticed: He rarely or never refered to any scientific studies, but would rather resort to allegories.
Eg when asked why the expensive Amino Acids used in his drink formula were better than regular Amino Acids, his answer was something like: "You don't put second oil in a sport car", or something like that.
Frankly, if he can back up his products with facts and results (both!), great.
If not, and he also doesn't admit it, he's a con artist.