I've never had anything slow down my hair loss, granted I'm late 30s and it's a natural hairline.
I'll probably consider FUE to fix it, the amount you spend over years in supplements/lotions will probably cost more.
I won't consider Rogaine, because I CBF applying serum twice a day for the rest of my life.
Derma Pens are showing promising results, haven't started using mine yet.
Finasteride didn't do anything, but give me sides.
I'm always interested if anyone has found things which work! I did read some interesting posts about 830nm red light therapy, in-regards to stopping hair loss.