Pheraplex - from what i hear does convert slightly(aromatize) to estrogen. So that would be a problem for growth plates if you are still growing. However if you think you can still grow another inch then you are probably too young to try any steroids/prohormones...you should be at least 21 which it sounds like you are not. I'd just hold off for a year or two...or however long until you finish growing/developing....you may (most likely) regret it later. there are a bunch of "natural" non-hormonal supplements that work really well...look into X-factor, i like methoxyisoflavone at 2 grams a day (bulk powder is not expensive= ******** .com). good luck with whatever you choose to do b/c ultimately it is up to you.
-Soma