65 citations
,
November 2008 in “Pediatric Dermatology” Phototherapy is effective and well-tolerated for treating childhood psoriasis and pityriasis lichenoides chronica.
October 2022 in “Journal of ophthalmology” Light therapy may improve eye conditions by stimulating cell activity and increasing oxygen availability.
January 2024 in “Open MIND” Melatonin and photobiomodulation both help hair regrowth in German Spitz dogs with alopecia X.
August 2024 in “Siberian Journal of Life Sciences and Agriculture” Melatonin and lyotritone improve hair growth and quality in white rats.
3 citations
,
May 1979 in “PubMed” 27 citations
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January 1995 Melanin in black hair protects it from sun damage better than light-brown hair.
March 2026 in “Quality in Sport” Red light therapy can boost athletic performance and aid healing.
25 citations
,
October 2022 in “Ophthalmic Research” Red light therapy temporarily increased blood flow in the eye but didn't change other eye structures.
September 2023 in “Journal of The American Academy of Dermatology” People were generally happy with the home light therapy devices for hair loss.
10 citations
,
May 2021 in “Clinical, cosmetic and investigational dermatology” UV exposure causes hair thinning, graying, and changes in hair growth cycles in mice.
6 citations
,
March 2022 in “International journal of molecular sciences” Natural skincare products may help reduce sun damage and support the skin's daily cycle.
October 1995 in “Pediatric Research”
January 2000 in “Optics Letters” Laser treatment can inhibit hair growth and different hair colors reach different temperatures when lasered.
Melatonin and photobiomodulation are effective for treating Alopecia X in German Spitz dogs.
36 citations
,
April 2016 in “Experimental Dermatology” Photobiomodulation may help with hair growth and wound healing, but research is inconsistent and needs better quality studies.
9 citations
,
July 2018 in “European journal of dermatology/EJD. European journal of dermatology” Disrupted sleep patterns can harm skin and hair cell renewal, but melatonin might help.
1 citations
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September 2024 in “iScience” Disrupted sleep patterns from artificial light can slow hair growth and may lead to hair loss.
April 2023 in “The journal of investigative dermatology/Journal of investigative dermatology” Phototherapy helps some patients with alopecia areata regrow hair, especially those with hair at treatment start and less severe forms of the condition.
June 2020 in “Journal of Investigative Dermatology” More research with diverse participants is needed to determine the effectiveness of photobiomodulation devices for hair loss treatment.
April 2023 in “Journal of Investigative Dermatology” Sunlight simulation causes skin inflammation, with different skin types reacting at different levels of exposure.
17 citations
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December 2015 in “International Journal of Cosmetic Science” Visible light can improve skin disorders and hair loss, but more research is needed to understand long-term effects.
26 citations
,
November 2019 in “Medical Science Monitor” LED light therapy boosts bone cell growth and function.
1 citations
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February 2025 in “Photodermatology Photoimmunology & Photomedicine” 830 nm LED light effectively treats and prevents skin redness and dark spots, while 590 nm LED light only helps prevent them.
1 citations
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April 2018 in “Journal of dairy science” Dairy cows' skin and hair follicles change size and growth phase around the time they give birth.
September 2017 in “Journal of Investigative Dermatology” Photodynamic therapy can potentially remove nonpigmented hair by damaging hair follicles.
January 2026 in “Journal of Hard Tissue Biology” Red LED light boosts cell activity and growth, aiding wound healing and blood vessel repair.
26 citations
,
January 1992 in “Carcinogenesis” TPA strongly increases ODC activity in certain skin cells, potentially aiding tumor growth.
January 2002 in “HAL (Le Centre pour la Communication Scientifique Directe)” Melatonin affects fur growth timing in chinchillas.
1 citations
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June 2022 in “Photobiomodulation, photomedicine, and laser surgery” Photobiomodulation increases hair density in 5 weeks for androgenetic alopecia.
116 citations
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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.