
Originally Posted by
marcus300
In humans your Endocrine system is not fully functional until an average age of 25yrs, although the main development is up to around 21yrs it still fluctuates a little bit up to its fully functional age.
There is a risk of permanently damaging your HPTA if you take AAS to young, ive noticed over the years with many Bodybuilders who have started in their early 20's they have had some major issues with recovery and natural Testosterone, I guess its all down to what you want to risk for the reward but IMHO i think 24-25 yrs old is a good starting point what should reduce the risk of damage. Why would anyone shut down a system what hasnt fully developed is beyond me.