Has anybody used the supplement OPTYGEN? I have seen it advertised in IT a couple of times. Is there anything harmful/ilegal in it. I know Steve Larsen is endorsing it, but you never know. Any validity to their statements of increasing V02 Max, reducing lactate threshold, etc. Half of these supplements advertise, and I think they are a bunch of Sh*t. Just wondering if it is safe/legal/worth training with.

Bob