55 citations
,
March 2010 in “Aging” Circadian clock genes are important for hair growth and may affect aging-related hair loss and graying.
31 citations
,
January 2011 in “Dermato-endocrinology” Melatonin protects skin against UV damage by regulating various cellular processes.
28 citations
,
May 2017 in “Molecular ecology” Researchers found genes that control hair color and growth change before the visible coat color changes in snowshoe hares.
18 citations
,
January 2020 in “Ecology and evolution” Genes related to pigmentation, body rhythms, and behavior change during hares' seasonal coat color transition, with a common genetic mechanism in two hare species.
10 citations
,
August 2014 in “Skin research and technology” Sleep, testosterone levels, and a specific enzyme activity affect skin oil production in women.
9 citations
,
August 2013 in “Archives of Dermatological Research” A gene called BMAL1 plays a role in controlling hair growth.
6 citations
,
December 2011 in “Nature” The circadian clock in skin cells controls their growth and rest cycles.
1 citations
,
January 2021 in “Brazilian Journal of Medical and Biological Research” Constant light exposure during pregnancy changes newborn rabbits' skin, affecting hair follicles, skin thickness, and pigment cells.
Melatonin can improve treatment and extend remission for certain skin conditions.
September 2017 in “Eureka, Health Sciences/Eureka, Health Sciences.” Chronotherapy is more effective than traditional treatment for alopecia areata.
3 citations
,
May 2016 in “Dermatology Online Journal” Changing estrogen levels during menopause might affect genes related to body rhythms and cause increased hair loss.
75 citations
,
September 2017 in “Developmental biology” The circadian clock influences the behavior and regeneration of stem cells in the body.
116 citations
,
May 2013 in “Proceedings of the National Academy of Sciences of the United States of America” Hair grows faster in the morning and is more vulnerable to damage from radiation due to the internal clock in hair follicle cells.
March 2025 in “bioRxiv (Cold Spring Harbor Laboratory)” HairTime can predict and adjust human sleep patterns using a hair sample.
506 citations
,
January 2012 in “Molecular and Cellular Endocrinology” Melatonin affects many body functions beyond sleep by interacting with specific receptors in various tissues.
17 citations
,
April 2009 in “Andrologia” A boy's early puberty caused by a testicular tumor returned to normal after surgery.
Ion sequential therapy improves heart function after a heart attack.
1 citations
,
May 2016 in “The Veterinary Journal” Glucocorticoids affect dogs' skin reactions to histamine, which vary by time of day.
1 citations
,
April 2020 in “bioRxiv (Cold Spring Harbor Laboratory)” Goat skin changes with the seasons due to genes affected by daylight and hormones.
5 citations
,
June 2011 in “PLoS ONE” Mammoth hair grew faster than human hair and showed seasonal changes in growth and mineral content.
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.
47 citations
,
May 1999 in “Reproduction” Goat reproductive activity and coat growth are affected by light and temperature, with temperature altering prolactin levels and hair growth, but not melatonin or estrus onset.
January 2017 in “Chemistry & Industry” Eating fewer calories may slow aging and removing old cells can increase lifespan in mice.
38 citations
,
February 2005 in “The journal of sexual medicine” The testosterone patch and gel are both effective, but they have different absorption patterns and effects on hormone levels.
11 citations
,
September 1992 in “Journal of pineal research” Immunizing goats against melatonin can temporarily change their cashmere growth cycles and increase fleece production.
1 citations
,
April 2001 in “Biological Rhythm Research” Deuterium oxide extends the hair cycle duration in mice without changing hair structure.
June 2020 in “The journal of investigative dermatology/Journal of investigative dermatology” Platelet-rich Plasma Gel may help treat en coup de sabre scleroderma, improving symptoms and skin quality with minimal side effects.
2 citations
,
March 2022 in “Research Square (Research Square)” Seasonal changes affect gene activity linked to hair growth in Angora goats, influencing mohair quality.
November 2022 in “Research Square (Research Square)” Seasonal changes affect hair growth genes in Angora goats, possibly influencing mohair quality.
March 2014 in “Medicina cutánea ibero-latino-americana” Melatonin applied to the scalp helps increase hair density in people with early hair loss.