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The book "Color Atlas of Hair Restoration Surgery" provides useful information on hair restoration techniques, though some methods discussed may cause scarring.

This article reviews various aspects of diagnosing and treating alopecia, including medical and surgical therapies, without reporting new clinical results.

This study suggests hair diameter may indicate protein status in children if the sampling location on the head is controlled, noting inconsistencies in past research.

This study analyzed how oxidative hair dye leaches from pigmented and nonpigmented hair during wash cycles, finding that melanin influences the dye deposition and leaching processes.

This study analyzed gray hair, revealing that it differs from pigmented hair in follicular activity, oxidative balance, and structure, impacting coloring processes and necessitating adapted techniques to maintain hair quality.

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.

This study introduced an eco-friendly enzymatic hair dyeing process utilizing laccase-catalyzed polymerization of hematoxylin, achieving intense, long-lasting color comparable to commercial dyes while enhancing hair strength and offering antioxidant and UV-shielding benefits.

This case study highlights rose stem cell-derived exosomes combined with thulium laser therapy as a promising treatment for stress-induced alopecia areata, achieving significant hair regrowth and pigmentation without corticosteroid side effects, though further research is needed for broader application.

This study found that individuals with black hair have a significantly higher risk of alopecia areata compared to those with dark brown hair, while lighter hair colors like red or blonde are associated with a lower risk.

This review discusses the harmful effects of coloring shampoos containing trihydroxybenzene on the scalp-skin barrier and emphasizes the need for safer ingredient selection to prevent side effects.

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.

Pilocarpin can cause hair regrowth and color change in some cases but not in others, and it may have side effects in animals.

This pilot study found that prebleaching either virgin or previously colored hair only slightly affects the SERS spectra of dyes applied afterward, without impacting the accuracy of dye identification, supporting the technique's robustness for forensic analysis of hair dyes.

This study reported that polymeric nanofibers containing minoxidil sulphate showed effective encapsulation and stability, with minimal concentration loss over six months, making them potentially ideal for delivering this unstable drug in a more visually appealing and easier-to-apply form.

This study highlights that misdiagnosis of hair and scalp disorders is prevalent in patients with skin of color and emphasizes the role of thorough examination and biopsies in improving diagnostic accuracy.

More research is needed to understand hair and scalp disorders in children with skin of color.

This study highlighted that dermatology residents in the U.S. felt comfortable handling common hair conditions like androgenetic alopecia but were less confident in dealing with hair care specific to patients with skin of color, pointing to gaps in training programs.

This atlas graphically presents hair restoration surgery techniques through drawings and photographs, without reporting new clinical results.

In this study, the researchers reported that chloramphenicol-loaded liposomes, particularly those incorporating deoxycholic acid, enhanced follicular uptake and showed strong antibacterial activity against methicillin-resistant Staphylococcus aureus, offering potential for treating MRSA-infected skin conditions with good skin biocompatibility and minimal toxicity.

This study found that a 671-base pair promoter sequence from the ultra-high-sulfur keratin gene is sufficient to direct tissue-specific and development-specific expression of a reporter gene during hair growth in transgenic mice.

This study developed a highly sensitive fluorescent assay for measuring enzyme activity in single hair follicles, allowing the efficient analysis of over 100 samples per day.

This study found that thermoporometry measurements effectively assessed hair porosity, showing that bleaching increases overall pore volume by adding smaller pores, while prolonged bleaching leads to fewer but larger pores likely due to pore-merging.

This study observed that injecting mice with α-MSH resulted in black hair regrowth in shaved and plucked areas, suggesting a potential link to the agent darkening hair in animals with a specific pituitary tumor.

Valproic acid can cause hair loss, but information on hair color change is not detailed.

This study used nanoscale secondary ion mass spectrometry to locate where calcium and copper are concentrated in colored hair, finding these metals particularly in the cuticle's sulfur-rich regions.

This study reports the development of a natural hair-coloring system using size-controlled ink particles from cuttlefish ink combined with chitosan, achieving darker and more uniform black coloration on hair than existing plant-based natural colorants, without the need for metallic mordants.

This study developed a natural hair dye using Coreopsis tinctoria Nutt. extract, finding that it produced yellow to dark brown colors depending on the treatment, with ferrous lactate enhancing dye performance and color stability after washing.

This study reported that discarded squid ink was used to develop a high-performance, environmentally friendly hair dye that offers a stable deep black color, UV protection, and preserves hair structure, while showing excellent biosafety in lab tests.

In this article, the authors describe how hair coloring in 2026 has transformed into a sophisticated, scientifically precise process involving advanced techniques, pre-treatment diagnostics, and careful chemical management for safe application.