January 2011 in “Journal of Society of Cosmetic Chemists of Japan” 18-MEA and SPDA can restore damaged hair's smoothness and reduce frizz.
34 citations,
January 1943 in “Endocrinology” Adrenalectomy boosts hair growth and melanin in black rats, even with vitamin B¹ deficiency.
27 citations,
October 1945 in “Endocrinology” Synthetic hormone treatment reduces melanin and hair growth in rats.
5 citations,
August 2014 in “Pharmaceutical Development and Technology” Propylene glycol and ethanol increase finasteride skin absorption, sodium lauryl sulfate doesn't.
4 citations,
November 2017 in “Journal of Cosmetic Dermatology” Certain polymers can stick to hair and increase volume, working best at a pH of 7 to 9.