what is low testosterone

Hello, I'm a 27 year old male, over the past two years i have been feeling terrible. I have no motivation, no drive, no desire to have sex. I have no energy, living on caffeine. Cant perform at my Job how I need to. Basically I have all the symptoms of low T including hair loss. massive weight...

From the book: Natural Versus Testosterone Therapy It always struck me as very arbitrary how testosterone deficiency was defined by most practicing physicians. For years most physicians decided to treat or not to treat based on the bottom value of their lab's total testosterone range. So...

If someone has a total testosterone of 150 but their free testosterone is within range, do they have low T? That was my case before I started TRT. I had clinically low total testosterone but my free testosterone was within range (but maybe on the lower end of the scale). So if someone has a...