August 2024 in “Cosmetics” K18® and Olaplex® both effectively repair bleached hair, improving its strength, smoothness, and overall health.
5 citations,
January 2021 in “International journal of biological macromolecules” Treatments improved hair surface and scale structure but didn't increase certain bonds in the hair cortex.
October 2023 in “International journal of women’s dermatology” Hair camouflage methods like wigs and extensions can help Black women with alopecia feel better but may also damage hair if not used carefully.