Effectiveness of Blue LED in Enhancing Hair Treatments: Analysis in Different Hair Ethnicities

May 2025 in “ Journal of Photochemistry and Photobiology B Biology ”

Juliana Ferreira–Strixino, Priscila Vareschi Cardoso Fujimoto, Paul Leite, Juliana Guerra Pinto

blue LED cosmetic permeation hair treatment hair ethnicities spot application sweep application hair fiber characteristics

TLDR Blue LED light improves hair treatments for Caucasian and Asian hair but not for African hair.

The study investigates the effectiveness of blue LED light in enhancing cosmetic permeation and hair treatment across different hair ethnicities. It found that blue LED, when combined with cosmetics, significantly improved the resistance, diameter, and cosmetic permeation in Caucasian and Asian hair, particularly with spot and sweep application methods. However, African hair showed better results with cosmetics alone, suggesting that blue LED may not be as beneficial for this hair type. The study highlights the importance of considering hair fiber characteristics when applying blue LED treatments.

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