Overreaction.

I'd take the drink over the junk an average American eats any day. I'd take it over my own well researched eating regime every other day if it seemed to be working for me.

You underestimate the power of self experimentation. With a drug which if you took 40x the daily dose you might die, or a drug that might cause significant harmful side effects at normal dose, you need careful studies to prove a benefit and quantify risks. With a dietary change, the risks are orders of magnitude lower. I'd be surprised if the average American wouldn't improve their nutritional status doing this for a while, with an existing diet likely low in magnesium, copper, zinc, vitamin c and d and probably more.