February 2022 in “Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature” Low-dose oral minoxidil is a promising, safe treatment for various hair diseases, improving hair thickness and density, but more research is needed on long-term side effects and treatment duration.
July 2021 in “Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature” June 2020 in “Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature” 
January 2017 in “Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature” 60% of women who didn't respond to 5% minoxidil for hair loss showed significant improvement with a 15% minoxidil solution.
May 2016 in “Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature” 
February 2016 in “Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature” A hair test can accurately predict if a person with hair loss will respond to minoxidil treatment.
December 2014 in “Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature” Low-level light therapy significantly increased hair density and thickness in people with hair loss, but they didn't notice a difference.
July 2014 in “Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature” Applying valproic acid on the scalp increased hair growth in men with hair loss.
February 2014 in “Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature” Dutasteride 0.5mg is more effective than finasteride 1mg for treating male pattern baldness.
Hair loss at the top of the head is linked to prostate cancer, but other types of hair loss are not.