TLDR Minoxidil helps 32% of patients with hereditary baldness regrow hair.
In a double-blind trial, 56 patients with androgenetic hereditary male pattern alopecia were treated with either 2% or 3% minoxidil or a vehicle for 12 months. The patients' bald patches were studied before and at monthly intervals during treatment. 32% of patients had hair regrowth that was classified as good to excellent. The patients who tended to show improvement had smaller diameter of baldness, shorter duration of baldness and had > 100 indeterminate hairs in the bald patch at treatment onset. Age and strength of minoxidil solution did not affect hair regrowth. No major side effects were reported.
March 2020 in “International Journal of Research in Medical Sciences” Microneedling with 5% minoxidil works better for hair loss than using 5% minoxidil alone.
32 citations,
January 2019 in “American Journal of Clinical Dermatology” Minoxidil helps treat eyebrow thinning, monilethrix, early hair loss, and shortens chemo-related hair loss.
May 2017 in “Journal of The American Academy of Dermatology” Microneedling with PRP and minoxidil (5%) improves hair growth more than minoxidil (5%) alone.
4 citations,
December 2015 in “MVP journal of medical science” Topical Minoxidil 5% works as well as the combination treatment for hair loss.
1 citations,
September 2015 in “MVP journal of medical science” Topical Minoxidil 5% is as effective as the combination treatment for hair loss.
21 citations,
March 2005 in “PubMed” 26 citations,
March 1994 in “Archives of Dermatology” 4 citations,
March 1988 in “PubMed” 
55 citations,
February 1985 in “Archives of Dermatology” Minoxidil applied twice daily can help regrow hair in some people with hereditary baldness, with no serious side effects.
