Quote Originally Posted by Brohim

Your endrocrine system is still up-regulating hormones hence teenage "raging hormones". Steriods are used for older people who's hormones are down-regulated and their body is not able to convert cholesteral to testosterone at a acceptable rate.

So it would do you no good to inject 100mg into your body. The average healhty male produces 500-1100mg of testosterone each week. If you inject 125mg that would be merely replacing what you are already producing.

Futhermore, if you inject synthetic testosterone, by week 8 or so your body will have shut down your natural production. Your testicles will shrink and now you will have to restart your system when you are done. (PCT) There is no certainty that your system will recover 100%.

So from 18-25 or so you have "natural" steriods coursing through your body. It is the greatest time to live for a young lifter. Focus on diet, training, and rest and you can make great gain's. There is no reason to take synthetic test at this age unless you wanted to compete in heavy weight bodybuilding competition's and live the lifestyle of a bodybuilder. As a pre-med student I'm guessing that isn't the route you are taking.

Nevertheless, these are the fact's, not advise or opinion's. Take these fact's and make your own decision's.

BTW I am natural, started just like you benching 135lbs. at 20yo and eventually gained 55 lbs. and can bench 300lbs. if I wanted to. But I lift for health not a show. I have also never been injured lifting. If you take testosterone by itself it will weaken your ligaments and might cause injury. IE your muscles become big but your tendons become weaker. Unless you stack with something like Anavar.
Nicely put but mickeys right about the test # but once again nice write