Your nutrition plan is a bigger predictor of what growth you experience and more importantly, what you will retain.

Cycling before 25 increases risks of permanently disabling the HTPA of your endocrine system which can lead to a number of acute and chronic problems (depression, sexual dysfunction, erectile dysfunction). Running cycles at any age will elevate the risks for hypertension, hypercholesterolemia, hyperlipidemia, alopecia, ED, dyspepsia, dyspnea, changes to hemoglobin and hematocrit and the potential for prostate problems - to name just a few.

The philosophy of many members here is that it is best to dedicate your efforts to eating, lifting, and sleeping and to build the foundation for steroids when your body is in a potentially better situation to handle the physiological strains.

Please give this a read: http://forums.steroid.com/anabolic-s...-steroids.html