Hair and nails can show hormone changes during puberty in dogs.
30 citations
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December 2014 in “BMC Genetics” Certain genes and proteins may influence wool growth in Aohan fine wool sheep.
14 citations
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May 2022 in “Animals” Female goslings have darker feathers than males due to more melanin.
2 citations
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July 2023 in “Animals” FGF10 and non-coding RNAs are important for cashmere goat hair follicle development.
1 citations
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October 2025 in “EBioMedicine” Women have a higher DHT/testosterone ratio than men, possibly due to gut bacteria activity.
March 2024 in “Veterinary sciences” Geriatric Julia Creek dunnarts often suffer from reproductive and skin diseases, impacting conservation efforts.
November 2023 in “Animals” Feeding goats more during the non-growing period increases cashmere yield and length.
January 2021 in “Turkiye Klinikleri Journal of Dermatology” Women with a certain type of hair loss had lower levels of a hormone called prolactin compared to healthy women.
83 citations
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February 1977 in “PubMed” Increasing light exposure in winter can make mares ovulate and cycle earlier.
25 citations
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February 1977 in “American Journal of Veterinary Research” Increasing daylight to 16 hours in winter can make mares ovulate and cycle earlier.
January 2023 in “Journal of applied animal research” Short photoperiods improve cashmere growth and quality in goats by changing hormone levels and gene expression.
20 citations
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January 1995 in “Cells tissues organs” Changing light periods synchronized wool growth cycles in sheep.
37 citations
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January 2009 in “Dermatology” Healthy women tend to lose more hair in July and April, and the least in February.
1 citations
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March 1989 in “Proceedings of the British Society of Animal Production” Hormones and daylight changes control when cashmere goats shed their hair.
July 2025 in “International Journal of Trichology” Hair shedding increases at the end of summer due to seasonal changes.
March 1994 in “Proceedings of the British Society of Animal Production” Angora goats produce more hair faster than Cashmere goats.
1 citations
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September 1984 in “Journal of Biological Education” Plants change their growth in response to shade based on light signals detected by phytochrome.
January 2021 in “Journal of clinical and cosmetic dermatology” Human skin responds to light with protective mechanisms, but more research is needed to understand these processes and their implications for health and therapy.
2 citations
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March 2019 in “Lasers in surgery and medicine” Higher light doses cause more damage to hair follicles, predicting better hair removal results.
4 citations
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January 2024 in “Allergy” Everyone has an immune response to PPD, but reactions differ, causing tolerance, mild inflammation, or allergy.
1 citations
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August 2010 in “Journal of dermatology” Photoepilation significantly reduces hair, and phototrichograms can objectively measure its effectiveness.
March 2024 in “GSC Advanced Research and Reviews” Different light affects cell functions and can help treat skin conditions.
60 citations
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October 2010 in “Molecular Imaging and Biology” Increased skin pigmentation in mice reduces bioluminescent signal accuracy.
8 citations
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April 2016 in “Experimental dermatology” B6.Cg-Tyr c−2J Hr hr /J mice have a stronger delayed sunburn reaction and are good for UV research.
5 citations
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December 2016 in “International journal of biometeorology” Bright light during the day doesn't change most human clock genes but may slightly increase Rev-erb-ß.
October 2022 in “Journal of Pharmaceutical Negative Results” Photobiomodulation therapy shows promise in treating various health conditions by using specific light wavelengths.
September 2017 in “The journal of investigative dermatology/Journal of investigative dermatology” Different types of human skin cells respond uniquely to various colors and doses of light, which could lead to specialized light treatments for skin conditions.
39 citations
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June 2017 in “Scientific Reports” Different lab conditions and light treatment methods change how human skin cells respond to light therapy.
81 citations
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October 2014 in “The journal of investigative dermatology/Journal of investigative dermatology” Certain genes control the color of human hair by affecting pigment production.
61 citations
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June 2018 in “Proceedings of the National Academy of Sciences of the United States of America” Light can turn on hair growth cells through a nerve path starting in the eyes.