December 2023 in “Forensic science international. Genetics” This study found that the RapidHIT™ ID system can successfully obtain DNA profiles from single hair roots, particularly those with high nuclei counts.
August 2022 in “Contact dermatitis” This case report describes a 24-year-old male who developed alopecia areata following an allergic reaction to a permanent hair dye, possibly linked to previous sensitization from a henna tattoo.
January 2019 in “Dermatologic Surgery” This source outlines the Dermatologic Surgery journal, which provides extensive and up-to-date information on diverse dermatologic surgical procedures and skin cancer treatments, featuring peer-reviewed articles, literature reviews, and case reports valuable to professionals like dermatologists and plastic surgeons.
February 2009 in “Journal of The American Academy of Dermatology” This study suggests that fractional infrared technology may effectively improve cervical skin laxity by enhancing dermal thickness without adverse effects in a small pilot group.
December 1990 in “Indian Journal of Dermatology Venereology and Leprology” Topical minoxidil and hair dye can improve hair density and appearance in congenital hypotrichosis.
December 1988 in “Anatomia, Histologia, Embryologia” In this study, eight healthy dogs showed hair and skin damage, including hair shaft fractures and skin irritation, after repeated application of Clairol Hair Dye Flaxen Blonde.
August 1985 in “Proceedings ... annual meeting, Electron Microscopy Society of America/Proceedings, annual meeting, Electron Microscopy Society of America” This study investigated the effects of intensive hair dye use in mixed-breed dogs and found changes in the cuticle of the hair shaft and the epidermis using scanning electron microscopy.
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July 2022 in “Journal of Cosmetic Dermatology” In this study, an ammonia-free and PPD-free permanent hair dye was tested on 50 ethnically diverse females, showing no cases of contact dermatitis and significant improvements in hair shine, color, moisturization, porosity, and combability after two dyeing sessions.
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January 2016 in “Skin research and technology” This study found that oxidative hair dyes altered the color and ultrastructure of Caucasian hair but did not significantly affect the hair's breaking strength.
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December 2021 in “Annals of phytomedicine” This study found that a herbal hair dye formulated with a 1:2 ratio of henna and indigo successfully colored unpigmented hair dark brown to black, with favorable attributes compared to synthetic dyes.
This study found that extracts from plants like onion peel and walnut possess strong antioxidant properties, making them promising eco-friendly alternatives to synthetic hair dyes, delivering vibrant colors and better wash fastness when combined with oxalic acid.
June 2026 in “Zenodo (CERN European Organization for Nuclear Research)” In this study, researchers developed and evaluated an herbal hair dye using extracts from plants like henna and amla, which possess antibacterial and antioxidant properties, and found favorable results through various tests such as organoleptic and physico-chemical evaluations.
June 2026 in “Zenodo (CERN European Organization for Nuclear Research)” This study prepared a herbal hair dye using extracts from various herbs like Ratanjot, Henna, and Amla, known for their antibacterial and antioxidant properties, and evaluated its characteristics and effects through organoleptic and physico-chemical assessments, among other tests.
June 2026 in “Applied and Computational Engineering” This study reviewed the principles and classifications of hair dyes, identifying significant differences between oxidative, temporary non-oxidative, and semi-permanent non-oxidative dyes in terms of duration, application methods, and potential risks, which could help improve safety and convenience in hair dye use.
May 2026 in “Zenodo (CERN European Organization for Nuclear Research)” This review highlights that natural hair dyes from plant-derived pigments can produce viable colors on gray hair with low irritation potential, though they face challenges in shade range and consistency; some products may also be adulterated, affecting safety perceptions.
May 2026 in “Zenodo (CERN European Organization for Nuclear Research)” This review summarizes current research on natural hair dyes, reporting that plant-based formulations can safely provide viable colors on gray hair with minimal irritation compared to synthetic options but face challenges in color range and consistency.
May 2026 in “Zenodo (CERN European Organization for Nuclear Research)” This study developed a herbal hair dye gel using natural ingredients like henna and amla, which was found to provide natural color, improve hair texture, and clean the scalp without causing irritation, making it a safe and effective alternative to chemical hair dyes.
May 2026 in “Zenodo (CERN European Organization for Nuclear Research)” This study found that a herbal hair dye gel made from natural ingredients like henna and amla showed promising results in providing natural color and hair health benefits without causing irritation, offering a safer alternative to chemical hair dyes.
April 2026 in “Zenodo (CERN European Organization for Nuclear Research)” This review discusses the development and benefits of herbal hair dye formulations using medicinal plants like henna and indigo, noting their potential as safer, eco-friendly alternatives to synthetic dyes due to their nourishing and protective properties for hair and scalp.
April 2026 in “Zenodo (CERN European Organization for Nuclear Research)” This review concludes that herbal hair dyes made from medicinal plants like henna and indigo offer a promising natural alternative to synthetic hair colorants, potentially reducing side effects while providing additional benefits such as hair nourishment and scalp protection.
March 2026 in “INTERANTIONAL JOURNAL OF SCIENTIFIC RESEARCH IN ENGINEERING AND MANAGEMENT” This study suggests that herbal hair dyes, using natural pigments, may provide a safer, eco-friendly alternative to traditional synthetic dyes, although their effectiveness depends on application technique and botanical purity.
March 2026 in “Zenodo (CERN European Organization for Nuclear Research)” This study formulated and evaluated a polyherbal hair dye using Phyllanthus reticulatus fruit and other natural ingredients, reporting that the dye provided satisfactory color, stability, scalp pH compatibility, and did not cause irritation, also demonstrating antioxidant and antimicrobial properties that benefit scalp health.
March 2026 in “Zenodo (CERN European Organization for Nuclear Research)” This study developed and evaluated a polyherbal hair dye using Phyllanthus reticulatus fruit, finding it to be a safe, effective, and environmentally friendly alternative to synthetic dyes, with added antioxidant and antimicrobial benefits for scalp health.
November 2025 in “Zenodo (CERN European Organization for Nuclear Research)” In this study, researchers formulated a herbal hair dye using natural ingredients like indigo and henna, finding that it provides excellent color, better dye retention, and is more environmentally friendly compared to conventional chemical hair dyes, without side effects.
November 2025 in “Zenodo (CERN European Organization for Nuclear Research)” In this study, researchers developed a herbal hair dye using ingredients like Indigo, Henna, and amla, which showed excellent color retention and were found to be more eco-friendly and safer for health compared to traditional chemical hair dyes.
November 2025 in “Journal of Ayurveda and Integrated Medical Sciences” This study evaluated an herbal hair dye made from plant-based ingredients, finding it stable, non-toxic, and effective in providing lasting color, improving hair texture, and reducing hair fall, making it a viable and eco-friendly alternative to chemical dyes.
March 2025 in “International Journal of Advanced Research in Science Communication and Technology” This study explores the potential of herbal hair dyes as eco-friendly alternatives to synthetic dyes, highlighting their natural coloring ability and additional benefits like scalp nourishment and hair strengthening, while evaluating factors such as pH, spreadability, and color fastness.
This study concluded that herbal hair dye formulations, particularly two-stage applications with henna, provide darker colors and may offer added protective benefits for hair and skin due to their plant-based ingredients.
April 2024 in “Pharmacognosy research” In this study, researchers developed a herbal hair dye using henna and other natural ingredients that achieved a color similar to natural black on blonde hair, though further testing on various hair shades is needed to explore its full benefits.
This study evaluated various herbal blends of powdered leaves, including Henna and Indigo, for their coloring and sensitivity reactions, finding Henna and Indigo to be effective natural colorants for achieving a reddish-brown hair color with better retention than marketed herbal hair dyes.