research Synthesis and Validation of Functional Nanogels as pH-Sensors in the Hair Follicle 29 citations , April 2017 in “Macromolecular bioscience” Scientists created tiny pH-sensing gels that can safely measure the pH levels inside hair follicles.
research Allergens of permanent hair dyes induces epidermal damage, skin barrier loss and IL-1 α increase in epidermal in vitro model 12 citations , December 2017 in “Food and chemical toxicology” Permanent hair dye mixtures can irritate and damage the skin.
research Determination of the pH Gradient in Hair Follicles of Human Volunteers Using pH-Sensitive Melamine Formaldehyde-Pyranine Nile Blue Microparticles 13 citations , September 2020 in “Sensors” Hair follicles have a pH gradient, increasing towards the root.
research Development and Physicochemical Evaluation of a Polyherbal Dual-Action Shampoo for Hair Coloring and Conditioning December 2025 in “Journal of Pharma Insights and Research.” The shampoo naturally colors and conditions hair safely without toxic chemicals.
research Riboflavin-Sensitized Photo-Acceleration of Food-Grade Genipin Coloration: Kinetic Insights, Mechanistic Analysis, and Application in Rapid Hair Coloration March 2026 in “Dyes and Pigments” Riboflavin and blue light speed up genipin hair dye, making it fast, glossy, stable, and eco-friendly.