Before undergoing testosterone replacement therapy (TRT), it’s vital to obtain a number of blood tests. The main blood tests to measure are total and free testosterone, hematocrit, PSA, estradiol, HDL cholesterol and others. Pre-treatment testing provides doctors with baseline values to diagnose hypogonadism (low testosterone) and asses overall health. Baseline tests are also conducted during TRT as well, ensuring that doctors can adjust TRT dose and catch side effects before they become an issue.
But do you know why these tests are needed or what they mean? Below, you’ll find some of the main blood tests that have been shown to be affected by TRT, so doctors measure them before and during therapy to prevent or manage side effects: