January 2001 in “China Surfactant Detergent & Cosmetics” Both conditioners help protect hair from perm damage, but their effectiveness varies.
January 2002 in “China Surfactant Detergent & Cosmetics” Shampoo D is best for fixing perm-damaged hair.
April 2023 in “Han'gug miyong haghoeji/Journal of the Korean society of cosmetology” Direct heat perms cause more damage to hair than softening heat perms.
October 2024 in “Cosmetics” ATG effectively reduces hair frizz without damaging hair strength.
March 2023 in “Asian journal of beauty & cosmetology” Keratin pretreatment improves the quality of damaged hair during perming.