Perms can damage hair and scalp, so proper assessment and care are essential.
January 2001 in “China Surfactant Detergent & Cosmetics” Both conditioners help protect hair from perm damage, but their effectiveness varies.
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.
March 2016 in “The Korean Society of Beauty and Art” MSG-based hair hardener improves hair thickness, strength, and wave retention after perms.
January 2013 in “프로그램북(구 초록집)” Hair perms or treatments seem safe to use up to 3 to 4 times during pregnancy.