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This study discusses the effects of incorporating various amino acids in hair care products, noting improvements in hair surface properties and color retention when integrated with conditioners.

This study found that two shampoos with different dyeing methods had varying abilities to dye hair and impact hair health, suggesting that individuals should select hair color shampoos based on their personal needs.

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.

Several companies launched new hair care ingredients in 2011 to improve conditioning, color retention, combability, and heat protection.

This study concluded that adding polymeric conditioning actives to shampoos improved color retention in permanently dyed hair, while additional cationic dyes at certain pH levels weakly dyed the hair directly.

This study suggests that in gp91phox-knockout mice, tranexamic acid administration led to brown hair by increasing MGRN1 and collagen XVII levels, while the retention of black hair appears to rely on the gp91phox/ROS/IL-1β/TGF-β pathway.

This study found that genipin-based pigments, accelerated by riboflavin and blue-light photocatalysis, achieved commercial-level hair dye results with enhanced gloss and excellent color retention while reducing cuticle disruption, offering a potentially safer and faster alternative to traditional hair coloration methods.

This study found that hair dyed with anionic basic hair dye lost more color after shampooing compared to cationic and nonionic dyes, with alkaline shampoo increasing this effect.

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.

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.

This study found significant differences in enrollment and completion rates among racial and ethnic groups in alopecia areata clinical trials, with Black patients showing lower enrollment and higher dropout rates compared to other groups.

This study found that using a hair-hardener improved hair thickness, amino acid content, surface condition, tensile strength, and wave efficiency without causing any allergic reactions in participants.

In this study, adding conditioning agents PA1, PA2, and PA3 to light blonde oxidative hair dyes improved combability and protein retention of light brown hair without affecting tensile strength, though PA1 and PA2 offered enhanced thermal protection.

This discussion reviews hair transplantation as a treatment for thinning, hairline restoration, or scar coverage in females, offering no new clinical findings.

This review discusses scalp micropigmentation (SMP) for camouflaging baldness and reports no new clinical results; it aims to highlight SMP's cosmetic benefits and practical advantages over surgical hair transplantation.

This study reported that fermented grapeseed oil may enhance hair permeability and improve strength and color retention in chemically treated hair compared to regular grapeseed or silicone oils.

This study evaluated various herbal combinations for hair coloring and found that a formulation of Henna and Indigo provided a natural reddish-brown color with better retention compared to marketed herbal hair dyes, without using synthetic agents that can cause allergic reactions.

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.

This review concludes that herbal nanoemulgel-based hair dyes, incorporating natural ingredients, enhance dye penetration and retention while providing additional hair and scalp health benefits compared to conventional dyes, though further studies are needed to confirm long-term safety and efficacy.

This review highlights that herbal nanoemulgel-based hair dyes, enriched with natural ingredients, improve dye penetration and retention and offer additional hair and scalp benefits compared to conventional dyes, although further research is necessary to verify their safety and efficacy for long-term use.

This study found that steers grazing on toxic tall fescue with continuous hair growth and reduced sweating had impaired thermoregulation, leading to decreased grazing activity and poor performance.

This study proposed a new standardized in vitro framework using human hair tresses to evaluate cosmetic hair product performance and found significant improvements in hair breakage, tensile strength, shine, volume, and frizz control compared to a control group without such changes.

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 developed plant-pigment-based shampoos using extracts from Neem, Fenugreek, Hibiscus, and Butterfly Pea, which demonstrated stability, antimicrobial properties, and potential scalp benefits such as hair growth promotion and dandruff reduction, making them a promising alternative to synthetic dyes.

Certain ingredients can help protect hair color.

This study found that the postnatal thymus contains a population of mesenchymal stem cells that may help maintain functional thymic microenvironments.

This study evaluated skin and hair color variations in different mouse strains, highlighting the association between hair cycle stages and skin pigmentation to better understand these features and their implications.

This study found that metabolite levels in hair samples differ significantly by hair color and segment, leading to recommendations for best practices in hair metabolomic studies.

In this study, researchers found that the primary cause of slippage and detachment of keratin capsules in hair extensions is the re-contamination by oily residues from the hairdresser's hands, rather than the use of hair care products like masks or conditioners.

This study observed that in wild snowshoe hares, gene expression patterns during seasonal coat color change show a consistent lag between gene expression and visible coat color changes.