Re: best supplements to take
Of the prohormones available legally, the various andros and dhea for example, most show a much stronger tendency to convert to estrogen than to testosterone or anything that would help gain mass. All have been tested in many studies looking for a hypertrophy or strength gain advantage, and none show it.
So, the prohormones don't seem to help, carry the risk of adverse action (estrogen is non- or anti-anabolic depending on the circumstances), and for what?
Things that increase testosterone or growth hormone or igf-1 are: sleep, very intense work with large muscle groups--squats and dead lifts most famously--possibly zinc, and possibly melatonin. Especially since the latter helps you sleep, which is the most anabolic activity there is other than exercise itself, it seems a better bet. Even for melatonin, caution is advisable, since it is also hormonal in action and therefore has wide systematic effects which we may not fully understand.
hope this helps