July 2025 in “Scientific Reports” Fermented grapeseed oil effectively repairs and protects chemically damaged hair.
Hair coloring and bleaching can permanently break down hair protein and temporarily change its properties.
3 citations,
June 2019 in “Journal of cosmetic dermatology” Lower pH straighteners change hair more but weaken it.
March 2014 in “CRC Press eBooks” Some nutrients and antioxidants may improve skin and hair health, but more research is needed to confirm these benefits.
October 2024 in “Cosmetics” ATG effectively reduces hair frizz without damaging hair strength.