[ugh]

http://www.diagnose-me.com/cond/C489728.html

[...]Recently, a group of Japanese researchers reported a correlation between excessive sebum in the scalp and hair loss. Excessive sebum often accompanying thinning hair is attributed to an enlargement of the sebaceous gland. They believed excessive sebum causes a high level of 5-alpha reductase, the enzyme which converts testosterone into dihydrotestosterone (DHT), and pore clogging, thus malnutrition of the hair root and a shift into the resting phase.[...]

Niet echt heel recent, namelijk uit de jaren 80 of 90 ofzo.

http://www.folica.com/Hair_Loss_Treat_d1283.html

Medical researchers in Asia believe that hair loss is caused mainly by insufficient blood supply to the scalp. The other possibility is excessive sebum, or oil, in the scalp, which causes clogged pores and malnutrition of the hair root ("Sebaceous Gland Hypothesis" proposed by Dr. Yoshikata Inaba of The Inaba Aesthetic Surgery in Tokyo).

Het boek met de studie:
http://www.med-estetica.com/Cientifi...6-AndroAlo.htm