7 citations
,
January 1990
August 2023 in “Journal of Health and Beauty” K-30 treatment restores protein and weight in damaged hair, making it similar to healthy hair.
90 citations
,
July 1993 in “Journal of Investigative Dermatology” 7 citations
,
September 2020 in “International Journal of Cosmetic Science” Different sizes of keratin peptides can strengthen hair, with smaller ones possibly increasing volume and larger ones repairing damage.
38 citations
,
July 1993 in “Journal of Investigative Dermatology”