Question about Supplements Mentioned in M&F.

[joverfield]

I got my new M&F magazine today, and there is a section talking about five supplements for strength. A few of these I have never heard of, so I was wondering if anyone has tried/has knowledge of how well these work or if they would cause a positive drug test. These are:

Forskolin (Coleus Forskohlii) - Test booster.
Alpha-Flycerylphosphorylcholine (Alpha-GPC) - Augments growth hormone response to exercise.
Phosphatidylserine (PS) - Test boost and cortisol reduction.
Huperzine A - Strength

Any information that anyone can tell me about these would be greatly appreciated.