Unfortunately Coffee and Cream the facts dont support your enthusiasm. If you have proven low levels of testrosterone as you age AND clear symptoms correlating to hypogonadism, monitored testosterone supplementation may be beneficial and that was what the CAA wanted. It may be harsh to ground someone for more than a couple of weeks, but the annual reviews would surely be what anyone taking the supplement would have anyway. However the risks include benign and malignant prostate issues, obstructive sleep apnoea, and deep venin thrombosis and pulmonary emboli. All are disqualifying or limiting for commercial pilots. Personally I wouldnt touch it with a bargepole unless medically indicated as above.