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This study suggests that hair loss was a metabolic adaptation allowing hominids to evolve larger brains by alleviating dietary restrictions on essential amino acids for hair and brain development.

This study reports that citrulline, uniquely found in the inner root sheath of hair follicles, can be specifically detected with the carbamido diacetyl reaction, resulting in a bright orange color.

This study identified key genes and pathways involved in the seasonal hair cycle regulation of yak, uncovering molecular mechanisms that may aid in understanding their adaptation to alpine environments.

This study identified key proteins, such as Sfrp1 and Ppard, involved in the complex and dynamic regulation of yak hair follicle growth and degeneration across different stages, offering insights into yaks' adaptation to highland environments.

This study observed that darker hair is typical in wetter regions for the Indriidae family, while within Propithecus, dark black hair is common in colder forests, suggesting evolutionary adaptations to environmental pressures.

This study observed structural and molecular changes in Ganxi goat skin that adapt to hot and humid climates and suggested that GSDMA might play a role in hair follicle regulation and skin homeostasis, though further research is needed to confirm its function in environmental adaptation.

This study found that higher scores of hair loss on the Hamilton-Norwood scale correlated with increased hair gain in the conchal bowl in men, suggesting potential age-related adaptations beyond cosmetic concerns.

This study constructed a single-cell atlas of hair follicle cells from yaks and taurine cattle, revealing that differences in WNT signaling within dermal papilla cells may be key to the yak's adaptation to cold environments on the Qinghai-Tibet Plateau.

In this study, preconditioning hair follicle-derived stem cells with valproic acid and/or rapamycin was shown to protect against damage caused by oxygen glucose and serum deprivation, potentially enhancing stem cell therapy efficacy for ischemic stroke by improving cell adaptation to oxidative stress.

This research review highlights how hair cortisol concentration can reflect the activation of the stress-response system in farm, domestic, and wild animals, noting it correlates with factors like species, sex, age, and environmental conditions, which may influence stress and adaptation.

In this study, the researchers found that mammalian hair likely evolved through the adaptation of existing structural proteins, as similar cysteine-rich α-keratins were identified in chicken and lizard genomes, suggesting pre-mammalian origins.

This study found that glutathione deficiency affects lateral root and root hair responses to indole butyric acid in plants, but not to indole acetic acid, indicating its role in auxin pathway regulation.

In this study, researchers developed a mathematical model of outer hair cell hair bundles that replicates experimental responses to mechanical stimuli, providing insights into the stimulus-dependent adaptation mechanisms and the functional significance of their three-row stereocilia configuration in mammalian hearing.

This letter discusses the limited adaptation of low dose oral minoxidil for androgenetic alopecia in North America and reports no new clinical results; the authors suggest safety concerns or unclear dosing may be factors.

This study examined genetic adaptations in Tibetan sheep through whole-genome resequencing, identifying key genes related to hypoxia tolerance, wool color, and body size. These findings provide a foundation for future molecular breeding strategies to enhance wool quality and adaptive traits in these high-altitude environments.

This study found that hair cortisol levels in black-tailed prairie dogs, influenced by factors like predation risk and lactation, were associated with reproductive success, supporting the Cort-Adaptation hypothesis.

This article discusses surgical treatments for male pattern hair loss in black individuals, emphasizing the need for technique adjustments due to specific characteristics of black skin and hair, but reports no new clinical results.

This study found that Tibetan cashmere goats have genetic adaptations that contribute to their finer cashmere, possibly enhancing their ability to withstand the cold climate of the Tibetan plateau, while identifying specific genes related to hair growth, pigmentation, and heart development.

This study found that Nubian ibex have developed genetic adaptations in response to their desert environment, including enhanced skin barrier, DNA repair, viral response, and metabolism of toxic compounds.

This study found that nitric oxide production in Solanum nigrum roots facilitates adaptation to excess zinc by promoting programmed cell death and altering root architecture.

This study investigated key genes associated with hair follicle cycle regulation and environmental adaptation in Xinjiang goats, highlighting ELOVL3's role in promoting dermal papilla cell proliferation under varying climates, potentially aiding in cashmere quality improvement and stress-resistant breeding.

This study found that in Chinese goat breeds, specific genetic variations, particularly in Tibetan Cashmere goats, are associated with traits like hair growth and adaptation to high-altitude environments.

This study demonstrates a varied distribution of keratins in the epidermis of the Malayan pangolin, suggesting evolutionary adaptations related to their distinctive scales.

This study analyzed gene expression changes during the autumn coat color change in mountain hares and found conserved gene regulation with snowshoe hares, highlighting its role in seasonal camouflage adaptation.

Asian hair restoration surgery requires different methods due to the unique characteristics of Asian hair, such as its sparseness and coarseness.

This paper introduces the Vertex Overload Framework for androgenetic alopecia, suggesting that chronic mechanical and thermal stress on the vertex contributes to hair follicle miniaturization, with androgens acting as co-mediators of stress adaptation rather than isolated causes.

This study suggests that sustained hair regrowth is necessary to significantly change patient-reported psychosocial outcomes in alopecia areata, with time since regrowth being a critical factor in measuring adaptation.

This study used genomic analysis to reveal moderate genetic diversity, minimal inbreeding, and specific genes under positive selection in Xiangdong black goats, highlighting their unique adaptation traits and potential for breeding and conservation.

This review highlights the role of the skin's photosensory system in mediating responses to UVA radiation, contributing both to immediate protective effects and to broader circadian and seasonal adaptations, but reports no new experimental results.

In this study, adult albino rats on a vitamin A deficient diet developed ocular symptoms like xerophthalmia and photophobia within four weeks, without showing loss of dark adaptation.