I started noticing my hair thinning at the temples in 2008 when I was 22. I did nothing about it except start using Vichy Dercos anti-hair-loss shampoo, which I used daily until late 2015. I then switched to daily Vichy Neogenic shampoo.
My hair loss has been slower than I imagined it would...
I think anyone considering taking Finasteride should indeed read the paper linked above. It says:
"However, a substantial body of evidence exists which points to serious and potentially ill-health effects of 5α-RIs' therapy. These include loss or reduced libido, erectile dysfunction, orgasmic...