I have had extremely low-T. It was around 100. I am 66. I had no energy, thinking struggles and no sex life at all. After starting treatment within two weeks I started to have a lot of energy, no sleep issues and after five weeks, my spouse and I are sexually active at least once a week! I love my life again. I did the head scan for the pituitary gland and went for a sleep test as well. Nothing is causing the low-T anymore. I am now in the normal range and have been for about two years. I still feel great! I never want to go back to that miserable life!