I'm 63, smoked pot, tobacco and drank a lot for 50 years and a recent T test during a physical came up higher than most 18 year old's. Full head of hair half way down my back and a dick so hard a cat couldn't scratch it. Wife used to smoke a little kief and get all frisky but after early menopause hasn't wanted sex for almost 5 years now. I wish pot removed my libido.
I avoid junk food but never exercise so am in lousy shape tho not heavy. 5' 8" and 136lbs. Pretty severe arthritis and chronic depression keep me from using any of the exercise stuff we have or even going out for a walk tho I was getting out on my mountain bike once a week for a 4 mile ride during the warmer months in the north. Mosquitoes can't get you when you're moving fast but swarm me on foot.
I take no pharma meds at all but do take a lot of supplements like termeric, St. John's Wort, Vit D3. zinc, selenium, Omega3s and a few more.
Zinc will put lead in your pencil and Saw Palmetto helps many as well as both being good for the prostate. Add a bit of selenium for the trifecta.
If you're losing hair just accept it. Says the guy with Fabio hair.