8 citations,
October 2017 in “Dermatology practical & conceptual” A spermidine-based supplement may help hair grow longer by keeping it in the growth phase.
Thyroid problems can cause hair loss and change hair texture.
12 citations,
December 2009 in “Amino Acids” Putting α-methylspermidine on mouse skin can start hair growth.
54 citations,
May 2001 in “Journal of Investigative Dermatology” Excessive putrescine causes hair loss in transgenic mice by disrupting hair follicle development.
January 2014 in “Journal of Investigative Dermatology” Proteins like aPKC and PDGF-AA, substances like adenosine and ATP, and adipose-derived stem cells all play important roles in hair growth and health, and could potentially be used to treat hair loss and skin conditions.