February 2021 in “Journal of the Korean Society of Cosmetology”
This study found that applying castor oil to damaged hair increased tensile strength and decreased absorbance, indicating improvements in hair texture.
13 citations
,
July 2011 in “Photomedicine and laser surgery”
This study found that coloring white facial hair is an effective and feasible adjunct to intense pulsed light therapy for hair removal, with similar efficacy between using black eyeliner and black hair dye.
December 2025 in “Journal of Pharma Insights and Research.”
This study explains the formulation and evaluation of a natural polyherbal shampoo, which effectively colors hair and provides conditioning without the dermal and systemic toxicity risks of synthetic dyes, offering an effective alternative to conventional products.
47 citations
,
June 1996 in “International Journal of Legal Medicine”
This article discusses how drug molecules integrate into hair fibers, focusing on biological transport mechanisms and physicochemical factors, but reports no new experimental findings.
January 2017 in “Clinical approaches and procedures in cosmetic dermatology”
This chapter reviews hair anatomy, hair shaft structure, and various cosmetic treatments that can alter or damage hair, but it presents no new research findings.