Sir, my age is 31, I go to gym regularly. My exercise coach has told me take testosterone boosters for building muscles. He has suggested taking capsules or injections. I am not sure about these things. Can you suggest me whether I should take these things or not and what could be the side effects of testosterone boosters capsules n injections. I would like to ask another question to an ayurvedic doctor, are there any herbs available for increasing the tesosterone levels naturally without any side effects which inturn can result in increased muscle mass. Thank you.