HOLY CRAP!!!! an intelligent comment from a younger person. no offense meant, it's a compliment. good for you for having the sense to ask this question. as you pretty much already stated, you're test levels are through the roof and any "boost" would be unnecessary right now and for at least the next several years. as for the age one might want to start with test boosters, early 20's is fine. by then you should have stopped all final development of your body systems. you could probably get away with doing some in your late teens, but then that raises the question, "why would you want to boost test when it's already high?". keep in mind test really does not lower until like you're early 30's or somewhere in there. unless theres a condition you might have. the short answer is, there is no exact age but with some knowledge,late teens and early 20's would be fine. remember young man, this is not a race and should continue a lifetime, slow and steady wins the race, not, take a bunch of crap too early in life and f**k up your body permanently. your on the right track, you'll be fine and better off then these young men that are already taking AAS/PH/PS.