"나이가 들면 콜라겐 17A1이라는 단백질이 줄어들면서 줄기세포들이 모발세포로 분화되지 못하고 상피피부세포로 분화가 되어 모발이 가늘어지게 된다" (Age-related DNA damage triggers the destruction of a protein called Collagen 17A1. That in turn triggers the transformation of stem cells into epidermal keratinocytes)

나이가 들면 왜 모애락 샴푸 인헨서 제품을 써야되는지 정확한 답변을 주는 연구결과입니다. 모애락 성분은 베타카테닌을 자극해 케라틴세포가
모발세포로 분화되는 것을 촉진시킬 수 있습니다.

http://www.sciencemag.org/news/2016/02/one-reason-your-hair-thinning-some-it-turns-skin