66 citations
,
September 2005 in “Photochemical & photobiological sciences” We don't fully understand how sunlight damages different types of hair.
23 citations
,
January 2001 in “International journal of toxicology” St. John's Wort extract and oil safety in cosmetics is unclear; more data needed on photosensitization, toxicity, and human irritation.
2 citations
,
October 2023 in “Animals” Lacto-fermentation changes amino acid profiles in bovine colostrum, but results are inconsistent.
During COVID-19, Iraqi women saw more hair loss and skin issues like acne due to stress, masks, and hygiene habits.
April 2020 in “Arquivo Brasileiro De Medicina Veterinaria E Zootecnia” A horse in Brazil had seasonal hair loss possibly linked to light exposure and melatonin levels.
39 citations
,
January 2020 in “Frontiers in Genetics” PDGFC gene may help select goats with desirable curly wool traits.
30 citations
,
January 2015 in “BioMed Research International” Continuous light exposure in rats leads to PCOS-like symptoms and suggests sleep habits might affect the disorder's development.
3 citations
,
September 2021 in “BioEssays” Dandruff might be caused by changes in how hair follicles naturally release oils and an immune response to this imbalance.
1 citations
,
October 2024 in “Canine Medicine and Genetics” The MLPH gene is not linked to seasonal hair loss in Rhodesian Ridgeback dogs.
March 2025 in “Frontiers in Veterinary Science” Changing light exposure boosts hormone levels and antioxidant activity, improving cashmere growth in goats.
11 citations
,
March 2023 in “Frontiers in Nutrition” Hair analysis can detect small changes in dietary zinc intake.
1 citations
,
April 2018 in “Journal of dairy science” Dairy cows' skin and hair follicles change size and growth phase around the time they give birth.
67 citations
,
September 2017 in “Cell Reports” Caloric restriction improves skin and fur structure but can cause muscle loss and movement issues.
May 2025 in “Neuropharmacology” Finasteride reduced seizures and prevented cognitive issues in rats after neonatal asphyxia but increased anxiety later.
90 citations
,
July 2014 in “Conservation Physiology” Hair cortisol levels in brown bears can be affected by both long-term and short-term stress.
9 citations
,
February 2022 in “BMC Genomics” Melatonin affects gene expression in goat hair follicles, potentially increasing cashmere production.
5 citations
,
March 1981 in “PubMed” A girl grew extra hair in areas where she had insect bites.
October 2022 in “BMC genomics” RNA editing significantly affects hair growth and follicle cycling in the Tianzhu white yak.
2 citations
,
August 2022 in “Animals” Essential oils may improve dogs' health and melatonin can help with their sleep and anxiety, but both should be used carefully.
December 2025 in “Bioengineering” Sebum is essential for skin health but can cause acne if unbalanced.
February 2025 in “The Open Dermatology Journal” Many COVID-19 survivors, especially women, experience hair loss and skin color changes, needing specific post-recovery care.
90 citations
,
October 1998 in “Animal Reproduction Science” Mouflon rams mature gradually with changes in body, horns, and hormones linked to age and seasons, reaching full sexual maturity well after puberty.
50 citations
,
October 1918 in “The journal of experimental zoology” Artificially inducing hair regrowth in mice can change the normal pattern and timing of hair growth, with minimal color differences between old and new fur.
13 citations
,
November 2019 in “Scientific reports” Certain drugs change freshwater snail shells to a "banana" shape.
1 citations
,
September 2021 in “Skin appendage disorders” Botulinum toxin injections can help treat common hair loss in men, but more research is needed to confirm this and understand how it works.
December 2023 in “Animals” The study mapped yak skin cells to understand hair growth better.
28 citations
,
August 2018 in “BMC genomics” DNA methylation changes are linked to hair growth cycles in goats.
16 citations
,
December 2020 in “International Journal of Clinical Practice” The pandemic changed how often certain skin conditions were diagnosed.
1 citations
,
December 2024 in “Scientific Data” Researchers identified key molecular changes in goat hair follicles that could improve cashmere production.
February 2026 in “Clinical Cosmetic and Investigational Dermatology” Low humidity changes skin gene expression, but emollients can help manage these changes.