August 1994 in “Molecular Endocrinology” Changing protein kinase levels in pituitary cells affects calcium flow and beta-endorphin release.
July 2021 in “Medical journal, Armed Forces India” Using platelet-rich plasma in hair restoration surgery significantly improves hair density after 6 months and is safe to use.
May 2021 in “Lasers in Surgery and Medicine” Minoxidil and photobiomodulation together improve hair growth better than minoxidil alone.
March 2020 in “Journal of the turkish academy of dermatology” There's no significant link between blood fat levels and male pattern baldness.
November 2019 in “Nosotchu” Man had stroke possibly linked to hair loss medications finasteride and minoxidil.
January 2019 in “Springer eBooks” PRP and LLLT can improve hair growth in AGA, but more research needed.
April 2018 in “Radiotherapy and Oncology” Prostaglandin helps regenerate hair follicles after radiation damage.
April 2017 in “Journal of Investigative Dermatology” 
June 2016 in “International journal of recent surgical and medical science” Early balding in men is linked to metabolic syndrome, so screening is important for prevention.
June 2016 in “American Journal of Cardiology” Hair loss may indicate higher risk of heart disease.