you should try to mimic puberty for the best results and least amount of stress to the body.
I don't believe in all that hormone supplement rubbish, because external substances throw other hormones out of wack.
so the best way to mimic the stress is to not lengthen to fast but to lengthen at a rate the body normally lengthens at.
now I don't want to hear all this rubbish about "your body can only lengthen that fast during puberty" it is a sily argument.
we are here to mimic as closly as possible not REPLICATE puberty. we can never go through puberty again.
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ok here are the lengthening speeds the body is accustomed to. the topic puberty.
The first stage: Boys generally begin puberty sometime around age 10, an initial growth spurt may occur (with average growth being around 2 inches (5.1 centimeters) a year).
The second general stage of puberty usually occurs around age 12 or 13, The boy will continue to grow taller rapidly, at a rate of 2 to 3 inches (5.1 to 7.6 centimeters) a year.
The third stage of male puberty occurs around age 13 or 14, but frequently as early as 11 or late as 16, the boy gains in height at a rate of over 3 inches (7.6 centimeters) a year.
Stage four of male puberty commonly takes place when a boy is around 14 or 15 years old, He begins to grow taller and even faster, at about 4 inches (10.2 centimeters) a year.
The final stage of male puberty occurs anywhere from age 14 to age 18. During this time, a boy will achieve most (but not necessarily all) of his height. His body shape will have evolved to that of a man's
http://health.howstuffworks.com/sexual-health/male-reproductive-system/male-puberty.htm