I have done TRT for a long time. I inject. I do the subcutaneous route 30 mg every other day without HCG augmentation. It seems to work for me but may not work for you. Estradiol response is more controlled 'for me' than when I did larger doses of testosterone less frequently. I follow Jay Campbell's recommendations he discusses in his book "The Testosterone Optimization Therapy Bible" which I highly recommend. Hope you find the correct answers! Hey another book I highly recommend that has some great insights on physiology, fasting, keto based diet, and physical training is by Dr. Jon Jaqush and Henry Alkire, "Weight Lifting is a Waste of Time". Don't let the title throw you their arguments are backed up by science and a ton of peer reviewed citations. These books will uplift your knowlege base and you will be able to be more discerning in selecting the right physician. My professional background is in medicine as a physician assistant. My specialty is emergency medicine. Luck!