Hello definitely it will be beneficial for hair growth but even the side effects also should be taken into consideration testosterone therapy carries various risks like increase in heart diseases, contributing to sleep apnea, stimulating noncancerous growth of the prostate, enlarging breasts, limiting sperm production, stimulating growth of existing prostate cancer and blood clots forming in the veins. If you wonder whether testosterone therapy might be right for you, talk with your doctor about the risks and benefits. If you are taking testosterone, make sure your doctor is monitoring your response to treatment with regular blood tests. Consult endocrinologist for further evaluation and treatment.