>>133273
>Are there studies
Yes, I'll leave you a few at the bottom, and feel free to ask for a citation on any specific claim I made. For now I will elaborate on this part:
Prostaglandin D₂ inhibits hair growth and is a derivative of prostaglandin H₂.
Garza, Luis A., et al. Prostaglandin D2 inhibits hair growth and is elevated in bald scalp of men with androgenetic alopecia. Science translational medicine 4.126 (2012): 126ra34-126ra34.
URL: http://stm.sciencemag.org/content/4/126/126ra34.short
Aspirin inhibits cyclooxygenase-2 (COX-2), the enzyme which converts arachidonic acid (the derivative of linoleic acid) to prostaglandin H₂---the immediate precursor to prostaglandin D₂.
Flower, Rod. What are all the things that aspirin does?: This fascinating but simple and cheap drug has an assured future. BMJ: British Medical Journal 327.7415 (2003): 572.
URL: https://dx.doi.org/10.1136%2Fbmj.327.7415.572
> A defining point in the history of aspirin was the discovery that it inhibited the prostaglandin forming cyclooxygenase.1
Not only does vitamin E also inhibit COX-2,
O’Leary, Karen A., et al. Effect of flavonoids and vitamin E on cyclooxygenase-2 (COX-2) transcription. Mutation Research/Fundamental and Molecular Mechanisms of Mutagenesis 551.1 (2004): 245-254.
URL: https://doi.org/10.1016/j.mrfmmm.2004.01.015
> …the tocopherols inhibited COX-2 activity…
but it does so synergistically with aspirin.
Abate, Aida, et al. Synergistic inhibition of cyclooxygenase-2 expression by vitamin E and aspirin. Free Radical Biology and Medicine 29.11 (2000): 1135-1142.
URL: https://doi.org/10.1016/S0891-5849(00)00425-1
Getting sunlight at high noon every now and then is also important, as vitamin D also inhibits COX-2.
Wang, Qingsong, et al. Vitamin D inhibits COX-2 expression and inflammatory response by targeting thioesterase superfamily member 4. Journal of Biological Chemistry 289.17 (2014): 11681-11694.
URL: https://doi.org/10.1074/jbc.M113.517581
So either consuming less substrate for prostaglandin D₂ formation (linoleic acid, arachidonic acid, etc) or inhibiting an enzyme crucial to its synthesis are both valid ways to reduce a certain kind of hair loss, and my opinion is that this kind is specifically the classical male pattern baldness. (Ultimately, consuming less substrate is the only valid long term strategy though.)
• https://www.ncbi.nlm.nih.gov/pubmed/26291567
• https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2956867/
• http://onlinelibrary.wiley.com/doi/10.1111/j.1365-4632.2007.03119.x/full
• https://www.ncbi.nlm.nih.gov/pubmed/18489298
• http://onlinelibrary.wiley.com/doi/10.1111/bjd.13114/abstract