I don't know. Sounds like a gimmick to me. Vitamins and minerals ... how is this different from carrying a couple of multi-vitamins that sell for about ten cents each? Except being many times more expensive.

On the other hand I used to hike with a girl who ate nothing but spirulina capsules during a pretty tough two-day hike. I was dragging rump near the end and she had loads of energy. I suspect it was an extended placebo effect. Go figure.