2 citations,
January 2004 in “PubMed” Conditioners with PQ-10 soften the flat part of hair cuticles but harden the edges.
9 citations,
March 2005 in “International Journal of Cosmetic Science” The torsional method effectively evaluates hair damage and the performance of hair care ingredients.
Different treatments change the strength and flexibility of human hair.
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.
4 citations,
August 2007 in “PubMed” Polyquaternium-70 shampoo is best for reducing frizz.