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.
103 citations
,
April 2005 in “Experimental dermatology” Prostaglandin F2alpha and related compounds can increase hair growth and darken hair in mice.
75 citations
,
January 1980 in “Journal of Investigative Dermatology” July 2024 in “Journal of Investigative Dermatology” Skin hormone levels change significantly after menopause.
195 citations
,
January 2008 in “Photochemistry and Photobiology” Visible light can damage skin and most sunscreens don't block it well; more research is needed on its effects and protection methods.
Laser diode light boosts hair follicle cell growth and certain gene expressions.
March 2020 in “Journal of Laser Applications” Photobiomodulation therapy significantly increases hair density and growth for androgenic alopecia, but more research is needed to confirm safety.
37 citations
,
January 2023 in “Ophthalmology and Therapy” Low-level red light therapy can shorten eye length in some myopic children.
1 citations
,
October 2023 in “Skin Research and Technology” Hair sunscreens were less effective than expected, especially for dark hair.
6 citations
,
August 1993 in “Archives of Dermatology” The study found that polymorphous light eruption varies among patients and can be distinguished from benign summer light eruption by the time it takes for symptoms to appear after sun exposure.
9 citations
,
January 2018 in “Medical research archives” Low-intensity light therapy is effective for skin healing, reducing inflammation, and treating various skin conditions.
77 citations
,
January 1980 in “Carcinogenesis” TPA is about 50 times more effective at promoting tumors than MZ.
Melatonin affects cell growth differently based on its concentration.
45 citations
,
May 2019 in “Scientific Reports” Low color temperature light (1900 K) benefits health by promoting melatonin, protecting eyes, and aiding healing.
118 citations
,
January 1992 in “Experientia”
15 citations
,
October 2012 in “Journal of circadian rhythms” RNA from horse hair follicles can track circadian rhythms non-invasively.
520 citations
,
January 2017 in “AIMS biophysics” Photobiomodulation therapy using red and near-infrared light can reduce inflammation and aid in healing various conditions.
10 citations
,
July 1980 in “British Journal of Dermatology” Topical putrescine and spermine increased DNA synthesis in hairless mouse skin.
1 citations
,
October 2022 in “International journal of endocrinology” Dihydrotestosterone changes some hormone-related gene expressions in rat pituitary glands but doesn't affect the estrous cycle.
31 citations
,
January 2021 in “Plants” Light, sugar, and auxin together influence root and root hair growth in plants.
May 1966 in “Zhurnal Tekhnicheskoi Fiziki (U.S.S.R.) For English translation see Sov. Phys. - Tech. Phys. (Engl. Transl.)” Finasteride can prevent breast cancer progression by blocking progesterone's conversion to a cancer-promoting hormone.
December 2025 in “Lasers in Medical Science” Combining red laser therapy with minoxidil improves hair growth more effectively than minoxidil alone in women with hair loss.
13 citations
,
December 2021 in “Wound repair and regeneration” Photobiomodulation helps hair regrow in injured skin by aiding cell movement and secretion.
January 1992 in “Proceedings of the New Zealand Society of Animal Production” Ferret hair growth starts between 0 and 4 days after melatonin treatment, with cell growth peaking in the hair germ and declining as the hair matures.
4 citations
,
October 2009 in “Skin research and technology” Colorimetry can accurately measure hair growth rates in mice.
12 citations
,
January 1987 in “Carcinogenesis” TCDD changes skin cell growth and keratin production in mice.
12 citations
,
July 2017 in “Scientific reports” Researchers developed a way to study human body clocks using hair tissue, which works similarly in both healthy and dementia patients.
34 citations
,
May 2013 in “Journal of the European Academy of Dermatology and Venereology” Hair growth slows and shedding increases after childbirth, but most women don't experience excessive hair loss.
36 citations
,
August 2023 in “Journal of Investigative Dermatology” Understanding the hair growth cycle in mice is crucial for accurate research, as it affects study results and requires careful timing and methods.
19 citations
,
April 2020 in “Psychological Medicine” The study found three different timing patterns of symptoms in women with premenstrual dysphoric disorder.