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research Alexandrite Laser Hair Removal is Safe for Fitzpatrick Skin Types IV-VI

90 citations , February 2000 in “Dermatologic Surgery”

This study concluded that the long-pulsed alexandrite laser is safe for hair removal in patients with Fitzpatrick skin types IV-VI, with complications occurring in only 2% of cases.

research Constructing EGF mRNA‐Enriched Extracellular Vesicles Based on the AAVS1 Safe Harbor Site to Promote Skin Wound Healing

June 2026 in “Advanced Healthcare Materials”

This study found that engineered extracellular vesicles (293F-EGF-EV), enriched in EGF mRNA, significantly aided skin wound healing in vitro and in a rat model by promoting fibroblast activity and improving wound recovery through processes like angiogenesis and reduced scarring.

research α-Mangostin, a safe and natural product as a candidate skin-whitening agent

December 2025 in “Scientific Reports”

In this laboratory study, α-mangostin was found to significantly reduce melanin content and downregulate pigmentation-related genes in cultured skin and B16F10 cells, suggesting potential application as a natural whitening agent in sunscreen development.

research 519 Design of a new molecule proven to be safe and effective for topical depigmenting and antiaging method

November 2022 in “Journal of Investigative Dermatology”

This study developed a chalcone-based molecule that significantly increased tyrosinase inhibition and solubility, showing potential as a safe and effective skin depigmenting and antiaging agent, with supportive epigenetic and antioxidant properties observed in vitro.

research 880 Triptolide (TRP), a diterpenoid, shows a strong efficacy and a safe profile in the topical treatment of actinic keratosis lesions in a UV-B-induced mouse model

April 2017 in “Journal of Investigative Dermatology”

This study found that a single dose of TRP significantly reduced the number of UV-B-induced actinic keratosis lesions in a mouse model and was associated with improved skin histology and minimal side effects.

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Learn

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learn Scalp Micropigmentation

Is scalp micropigmentation suitable for people with sensitive skin? Providers say scalp micropigmentation suits most skin types and describe patch tests, hypoallergenic pigments and a skin consultation for sensitive skin. These are provider claims rather than independent safety evidence, and pigment reactions remain a risk.
Are the pigments used in scalp micropigmentation safe? Providers describe SMP pigments as safe, medical-grade and made for the scalp, but those are supplier and clinic descriptions rather than regulatory approvals: no colour additive is approved for injection into the skin, and allergic reactions to tattoo pigment are documented.
Does scalp micropigmentation work on all skin tones and hair colors? Providers say SMP pigment can be matched to many skin tones and hair colors; claims that it works on all of them are marketing.
All 4 questions on Scalp Micropigmentation →

learn Hair Transplant

Surgery that moves hair follicles from the back of the scalp to thinning areas

Is a hair transplant safe? Serious complications are uncommon in published case series, but every transplant carries risks, including infection, folliculitis, numbness, scarring, poor growth and, rarely, skin necrosis. Risk depends on the surgeon and on who actually performs the surgery.

learn Verteporfin

Light-activated eye drug being studied for scarring

learn Mesotherapy

Injections of drug or vitamin mixtures into the scalp

learn Stem Cell Factor

learn Finasteride

Popular 5-alpha reductase inhibitor that lowers DHT, taken as a pill or used topically

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Community Join

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community Is Topical Finasteride Safe for Cats in My Home?

in Finasteride 46 upvotes 1 year ago

Topical finasteride is not known to be toxic to cats like minoxidil, but careful handling is advised to prevent ingestion or skin contact. OP seeks reassurance to convince their girlfriend of its safety around their cat.

community Minoxidil inhibits lysyl hydroxylase which is needed to produce collagen. If I take 2,5...5 mg of minoxidil every day can I cause my skin to age prematurely?

32 upvotes 1 year ago

Oral minoxidil is effective for hair loss and unlikely to significantly affect collagen synthesis, making it a safe option without causing premature skin aging. Users report positive hair regrowth without noticeable skin aging.

community Stop the fear mongering of oral minoxidil its one of the best treatments available in 2020. It does not cause heart lesions or adverse cardiac effects like people claim. I am maintaining with just oral minoxidil with retrograde alopecia and diffuse thinning all over nw3 hairline

78 upvotes 6 years ago

Oral minoxidil is considered a safe and effective treatment for hair loss at low dosages, with minimal cardiac risks. Users report positive results, though some experience side effects like increased heart rate and skin changes, and consulting a doctor is advised.

community 2 % fucoidan significantly alleviated AGA symptoms, promoted hair growth, and increased hair density

21 upvotes 11 months ago

2% fucoidan alleviated AGA symptoms, promoted hair growth, and increased hair density in mice. Fucoidan is considered safe for humans as a supplement and topical skincare product, with potential therapeutic effects against AGA.

community Tretinoin vs. micro-needling: what increases sulfotransferase activity more?

in Research/Science 1 upvotes 1 year ago

Tretinoin and microneedling both enhance hair growth through different mechanisms, with microneedling being considered safe for long-term use. Optimal microneedling needle length varies, but 0.8 mm is suggested for hair growth, and a Dermastamp is recommended to avoid skin damage.

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