They have blood tests for it, and a little bit of googling shows that there are home test kits too (that use saliva and are less accurate): https://www.amazon.

They have blood tests for it, and a little bit of googling shows that there are home test kits too (that use saliva and are less accurate): https://www.amazon.com/Testosterone-Level-Hormone-Balance-Test/dp/B00846J5YO https://www.amazon.com/Testosterone-Level-Hormone-Balance-Te...