Why insurance requires an 8 a.m. testosterone test and what causes hand numbness and locking fingers.

My insurance company won’t let me receive my testosterone injection unless I have a low testosterone level at 8 a.m. Does this make any sense? -- T.B. ANSWER: Although I am never fond of insurance ...

Certain health conditions can make it difficult for some men to have normal levels of testosterone. Low testosterone levels, also known as hypogonadism, can affect a person’s life, can cause different ...

Many healthcare providers regard testosterone cypionate and testosterone enanthate as interchangeable, but each has differences in their ingredients and duration of action. These differences influence ...

A clinical study of 65 men found testosterone injections improved libido for people with diabetes. The study's lead author said the findings were the first to show improvement from testosterone in a ...