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In this study, phenylthiocarbamide intake was associated with hair graying in rats, while switching to tap water led some rats to regain their original fur color, suggesting dietary factors influence pigmentation.

This article reports a rare combination of rapid-onset halo nevi, nonsegmental vitiligo, and premature scalp hair graying.

This study found no strong genetic link between hair color and alopecia areata risk, although a weak inverse association with blond hair was suggested, noting the results are exploratory and require further investigation with larger cohorts.

This review explores the role of oxidative stress and stem cell decline in hair graying, suggesting potential areas for future research but reports no new findings.

This study describes changes in scalp hair color, including rare instances of repigmentation, following volumetric modulated arc therapy for skin cancer; this potential side effect may warrant discussion during informed consent.

This study found that CD34- melanocyte stem cells regenerated pigmentation more efficiently, while CD34+ cells showed potential for neuron myelination, suggesting different therapeutic applications for each population.

This study found a significant association between premature greying of hair and deficiencies in vitamin D, vitamin B12, hypothyroidism, and disrupted iron profiles, alongside lifestyle factors like stress and smoking.

This study described the clinical and genetic features of two Iranian siblings with hereditary vitamin D resistant rickets, identifying a specific VDR gene mutation contributing to their symptoms.

Ketoconazole shampoo can cause rare pink hair discoloration.

This study found that increased PHGDH expression in mice led to earlier melanin and melanocyte presence in hair follicles but did not induce cancer.

This study in Saudi Arabia found that 55.9% of participants reported premature graying of hair before age 30, with risk factors including genetic, health, and lifestyle aspects such as smoking, anxiety, nutrient deficiencies, and family history.

In this case report, an 80-year-old woman experienced darkening of previously grey hair, which may be linked to vitamin B supplementation, though its effectiveness is typically associated with reversing greying only in the presence of an initial vitamin B deficiency.

This case report describes a 17-month-old girl who experienced sudden hair whitening during septic shock, suggesting systemic stress may trigger canities subita in young children and highlighting the need to distinguish it from congenital pigment dilution syndromes.

This review examined the psychological effects, mechanisms, health associations, and treatments related to premature hair graying, highlighting factors like genetics, oxidative stress, smoking, and diet, with the aim of enhancing understanding and addressing its broader implications.

This study found that individual differences between pigmented and unpigmented hair fibers in Old Order Mennonites suggest grey hair may be perceived as drier and less manageable due to small mechanical and moisture changes.

In this case report, researchers observed hair repigmentation in a man with metastatic renal cell carcinoma during treatment with axitinib, marking the first documented instance of this effect with axitinib without the use of hair dyes or other medications.

This study found that adverse reactions to para-phenylenediamine in hair dye, including severe allergic contact dermatitis, may be more common than currently reported and often misdiagnosed.

Darker hair may lead to higher cortisol readings, suggesting a need to adjust for hair color in studies.

This study observed that white hair can create an optical illusion of increased scalp visibility, potentially misleading clinical evaluations of hair loss and complicating hair transplantation planning, and identified five core dyeing strategies to address this phenomenon.

This study found that Korean Red Ginseng may protect against chemotherapy-induced alopecia by reducing hair follicle damage in a human hair follicle organ culture model.

This review discusses historical and literary accounts of sudden hair whitening, known as canities subita, and presents no new clinical findings.

This study suggests that the patchy thickening and reddish discoloration in rabbit skin during the hair cycle may be due to large anagen-phase hair follicles compressing the dermis and increased blood vessels causing redness.

This study concluded that iron deficiency is common among women but not more prevalent in those with female pattern hair loss or chronic telogen effluvium compared to control subjects without hair loss.

This case study reports a rare instance of RC11 associated with precocious puberty, severe hyperandrogenism, insulin resistance, and type 2 diabetes, suggesting a possible link to 11q-syndrome.

This review discusses various adverse drug reactions affecting hair, such as hair loss, hypertrichosis, and color changes, and emphasizes their generally reversible nature if the causative drug is discontinued.

This commentary critiques the definition of iron deficiency in hair loss studies, suggesting higher serum ferritin levels as a more accurate threshold for diagnosing deficiency in women.

This study reports a novel TRbeta gene mutation associated with resistance to thyroid hormone syndrome, which may contribute to various forms of alopecia in the affected family members.

In this study, researchers found that mangosteen pericarp extract, combined with FeSO₄ as a mordant, effectively produced a stable reddish hair dye on bleached hair, with good color persistence and enhanced tensile strength, indicating its potential as an eco-friendly and safer alternative to synthetic dyes.

Iron supplements may reverse premature hair graying caused by iron deficiency.