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GlossarySun Damage (Ultraviolet-induced damage)

harm caused by UV radiation leading to skin and hair issues

Sun damage, also known as photodamage or UV damage, refers to the harm caused to the skin and hair by prolonged exposure to ultraviolet (UV) radiation from the sun. This can lead to a range of issues, including sunburn, premature aging (such as wrinkles and age spots), and an increased risk of skin cancer. UV radiation can also weaken hair structure, leading to dryness, brittleness, and color fading.

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research On the Role of Melatonin in Skin Physiology and Pathology

222 citations , January 2005 in “Endocrine journal”

Melatonin is important for skin health and protection, and can be made by the skin or applied to it.

research Photoprotective Effects of Caffeic Acid Against Ultraviolet-Induced Damages on Human Follicle Dermal Papilla Cells

2 citations , March 2017 in “Asian Journal of Beauty and Cosmetology”

Caffeic acid protects human scalp cells from UV damage.

research Modeling of Solar UV-Induced Photodamage on the Hair Follicles in Human Skin Organoids

January 2024 in “Journal of tissue engineering”

Sunlight exposure damages hair follicles, but certain stem cell-derived particles can reduce this damage and help with hair regeneration.

research Bazi Bushen Capsule Alleviates Skin Photoaging by Targeting the KEAP1–NRF2 Pathway

October 2025 in “Phytomedicine”

Bazi Bushen capsules reduce skin aging and damage from UV rays.

research A Novel In Vivo Model for Evaluating Agents That Protect Against Ultraviolet A-Induced Photoaging

26 citations , April 1998 in “Journal of Investigative Dermatology”

Sunscreens with higher SPF and UVA filters offer the best protection against skin aging from UVA rays.

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community Tretinoin can make it worse!!!

in Chat 7 upvotes 2 years ago

Tretinoin may enhance minoxidil's effectiveness for those not responding to minoxidil alone, but it could reduce efficacy for some who are already responding to minoxidil. Tretinoin requires careful use, including skin moisturizing and sun protection due to increased sensitivity.

community Evolution theory: AGA is your body trying to reduce the risk of prostate cancer by exposing your scalp to more UV

in Research/Science 3 months ago

Androgenic alopecia (AGA) might have evolved to reduce prostate cancer risk by increasing UV exposure to the scalp, but this theory is debated. Treatments like minoxidil and finasteride are used for AGA, though the exact causes and evolutionary reasons for hair loss are unclear.

community What About Phytosterol Alternatives - Rice Bran Oil - Natural DHT Blockers

in Research/Science 3 upvotes 1 year ago

The conversation discusses natural DHT blockers like rice bran oil, which may reduce 5α-reductase activity similarly to Minoxidil and Dutasteride. One user argues that finasteride is more reliable and effective than natural alternatives.