Once I quit taking testosterone, methyl-1 test, and madol for lifting weights mine started thinning a little. Too much androgens I guess. But Im also 46 so par for the course.
If you are into lifting weights those androgens will pack muscle on fast, but you will lose some hair. It was worth it for me.
Since I was losing mine at 22 and shaved it slick at 29 I would totally take that trade off.