Human hair can almost fully recover its structure within about 1,000 minutes after being stretched.
September 2015 in “The European physical journal. E, Soft matter and biological physics/The European physical journal. E, Soft matter” Longer time setting curls overnight leads to better curl retention.
3 citations,
September 2005 in “International Journal of Cosmetic Science” Different oils penetrate hair differently; monounsaturated oils like olive oil penetrate better than polyunsaturated oils.
22 citations,
May 2021 in “Nature Communications” Tissue stiffness affects hair follicle regeneration, and Twist1 is a key regulator.
1 citations,
September 2022 in “Pharmaceutics” The stiffness of a wound affects hair growth during healing, with less stiff areas growing more hair.