Saw Palmetto and Biotin might be worth a try.

[ThinningB420]

I've been on both for almost three months. I decided to drastically lower my SP because I was worried about the sides. However, I continue to take a hair vitamin which has some SP in it. I've noticed increased body hair (mostly length). I've also noticed my hair seems less dry than it has been in years. I started Rogaine last month and I've shed a lot so the thickening that appeared is gone. Hopefully, combined with Rogaine I can retain long enough for histogen or something else to come out.

For me, I think it's the biotin which has made my hair healthier.

Edit: A month seems awfully quick to make a drastic change in thickness in hair.