Yes, not guaranteed to work and could even cause irreversible impotence and permanent sexual problems for some users.
Not worth the risk at all.
I was scared to take it out of fear of this happening, and then the great anabolichalo (PIP) put it into perspective: a normal guy is lucky to have sex 3-4 times/week throughout their life. Whereas baldness is a 24/7 affliction

I had maybe 10% libido decrease but could also have been just getting older. Zero movement in my hairline, even w test, for 6-7 years now. A miracle product in my eyes, but experiences may vary