February 2026 in “Journal of the Korean Society of Cosmetology” Silicone oil viscosity affects hair curling and damage during treatments.
Rosehip extract improves hair treatment and waving efficiency with cysteine but not with thioglycolate.
March 2016 in “The Korean Society of Beauty and Art” MSG-based hair hardener improves hair thickness, strength, and wave retention after perms.
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June 2013 in “Fashion business” Rosehip extract improves hair wave, thickness, and color vibrancy.
August 2021 in “Han'gug miyong haghoeji/Journal of the Korean society of cosmetology” Using natural polyphenol cross-linkers like tannic acid and green tea extract in perm treatments improves curling and protects hair.