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This study found that melatonin may enhance hair follicle stem cell viability by downregulating the nuclear receptor RORA, which otherwise inhibits cell proliferation and promotes apoptosis.

This study found that high-resolution tusk isotope profiles from an African elephant can serve as a proxy for the seasonality of diet and precipitation, helping to reconstruct vegetation and climate in modern and fossil ecosystems.

This study found that the maternal nutritional status during early pregnancy significantly influenced epigenetic changes in offspring, as maternal diet altered DNA methylation at human metastable epialleles.

This study suggests that seasonal rhythm genes in cashmere goat skin are differentially expressed with changing daylight, potentially affecting hormone transformation and light sensitivity.

This study observed that alopecia in rhesus macaques follows a seasonal pattern, with the highest hair loss in spring, and varies with reproductive state, as pregnant females experience the most significant alopecia and lowest hair regrowth, which resumes postpartum.

The document concludes that scalp conditions have various causes and can present in many different ways.

This study found that scalp psoriasis in China commonly affects the forehead hairline, is worsened by seasonal changes, and often negatively impacts patients' quality of life.

This review explores the hormonal regulation of hair growth and changes with season, age, and sexual development, and calls for improved treatments for hair disorders.

This study investigated the Mandarin duck as a model for understanding lifelong developmental changes, finding that male sail feather morphogenesis involves a combination of local morphogenetic programs, epigenetic regulation, and hormonal cues, with increased female estrogen levels observed before the mating season.

The researchers reported that differences in brain functional connectivity between unmedicated seasonal affective disorder patients and healthy controls vary with ICA model order, peaking in volume at model order 70.

This study concluded that an endogenous circannual rhythm of prolactin secretion in mouflon influences their seasonal hair growth and moulting cycle, which varies under different photoperiodic and melatonin treatments.

This study found that in mink, the pituitary gland is essential for normal seasonal pelage cycles, and manipulating hormone levels can affect hair growth and type.

Environmental factors like temperature and nutrition affect hair growth, with humans showing seasonal hair growth differences.

This study aims to assess how daily life factors affect sleep patterns and describe individual sleep changes across the year, with results to be published in future research.

This study reported that among dermatology patients at Sir Syed Hospital Qayyumabad, acne and other dermatoses were most frequent, with seasonal variations influencing their prevalence.

In this study, oral supplementation with NMN for 12 weeks in middle-aged Japanese women significantly increased hair growth density and diameter and improved subjective assessments of hair texture and quality of life, with no significant changes in hair hormone concentrations observed.

This study found that injecting various hormones or hormone-cholesterol mixtures into Willow Ptarmigan and White-tailed Ptarmigan led to the growth of pigmented feathers instead of the usual white winter feathers, suggesting hormonal influence on plumage color changes.

This narrative review explores the historical use and significance of cosmetics in ancient India, detailing various formulations and botanical ingredients documented in Ayurvedic texts, but it reports no new research findings.

This study found that Hoxc13 gene expression, influenced by melatonin, was associated with hair follicle activity in Cashmere goats, with in vitro evidence suggesting effects on genes relevant to follicle development.

The study observed that Friesian heifers experienced significant adaptation challenges to Kenya's equatorial conditions, taking around 18 months for their coat composition to resemble that of Dutch heifers in summer.

This collection of papers reviews recent research on women's skin, focusing on hormonal influences, environmental impacts, and specific skin disorders, with no new clinical results reported.

This study found that melatonin implants caused male weasels to molt, develop a new white winter coat, and become reproductively inactive, suggesting melatonin affects their neuroendocrine system.

This study found that Alaskan moose hair mineral content varied seasonally and by location, with differences in magnesium, copper, and manganese levels linked to winter-killed calves.

This article reviews the historical development of understanding the hair growth cycle, particularly anagen, catagen, and telogen phases, and reports no new clinical findings.

This study investigated the impact of prolactin and melatonin on secondary hair follicle growth patterns in Angora and Cashmere goats using in vitro methods, without reporting new definitive results.

This study found that the pituitary gland is crucial for normal pelage color cycles in weasels, with certain hormones influencing regrowth of pigmented or white hair after molting.

The researchers reported that exposure to long days after short-day treatment induced a synchronized, out-of-season wool growth cycle in New Zealand Wiltshire sheep, similar to cycles induced in other species.

This study found that biologic rhythms in mammoth hairs differed from those in modern human hair, with variations in growth rates and mineral content providing insights into the lifestyle and behavior of extinct species.

This study found no improvement in male-pattern hair loss after six months of using laser hair-comb therapy in two men.

This study found significant seasonal variations in public interest for several skin conditions, including tinea pedis, pruritus, and psoriasis, among others, based on Google search trends in Türkiye from January 2022 to January 2025.