If you have ever had your testosterone checked and been told the number was “normal,” or “too high,” or “out of range,” there is something important you were probably not told.

The blood test is not measuring what most women think it is measuring.

It is measuring one slice of testosterone. A small one. And the lab range printed next to that number was built for a different purpose than guiding hormone treatment. Once you understand what the test actually shows, the whole conversation about dosing, safety, and “normal” levels changes.

If you have spent any time in the menopause corner of the internet, you have probably heard it by now. Several well-known voices on social media and popular podcasts are promoting the use of Duavee for women to prevent breast cancer, for women with DCIS, or for women who simply want to stay "safe." And just like that, a quiet little pill becomes the next thing every woman is told she should be on to prevent breast cancer.