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Glossary Sunscreen

topical product protecting skin from harmful ultraviolet radiation

Sunscreen, also known as sunblock or sun cream, is a topical product designed to protect the skin from the harmful effects of ultraviolet (UV) radiation from the sun. It contains active ingredients that either absorb, reflect, or scatter UV rays, thereby reducing the risk of sunburn, premature aging, and skin cancer. The effectiveness of sunscreen is often indicated by its Sun Protection Factor (SPF) rating, which measures the level of protection against UVB rays.

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Research

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research Cutaneous Permeation and Penetration of Sunscreens: Formulation Strategies and In Vitro Methods

79 citations , December 2017 in “Cosmetics”

This review study focused on various in vitro methods to evaluate skin permeation and retention of sunscreens, highlighting the importance of assessing sunscreen penetration due to widespread nanomaterial usage and advancements in cosmetic formulation.

research A new hair follicle-derived human epidermal model for the evaluation of sunscreen genoprotection

27 citations , June 2015 in “Journal of photochemistry and photobiology. B, Biology”

This study reported that sunscreen with SPF50+ provides a high level of DNA protection against UV-induced damage in a reconstituted human epidermis model, comparable to that in skin explants.

research Sunscreen and facial skincare products in frontal fibrosing alopecia: a case–control study

26 citations , October 2018 in “British Journal of Dermatology”

This study found that high frequency use of sunscreen is associated with frontal fibrosing alopecia among women attending a specialist hair clinic in Australia.

research Frontal fibrosing alopecia: Regrowth following cessation of sunscreen on the forehead

26 citations , June 2018 in “Australasian Journal of Dermatology”

Stopping sunscreen use on the forehead led to hair regrowth in a woman with frontal fibrosing alopecia.

research Sunscreens and Hair Photoprotection

24 citations , January 2006 in “Dermatologic clinics”

This review discusses the chemical effects of UV radiation on hair, hair photoaging, and photoprotective measures, and calls for more focused research in hair photoprotection as a field.

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Community Join

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community When do you guys apply wax and sunscreen to your hair and scalp after minoxidil in the morning?

in Minoxidil 67 upvotes 1 year ago

Apply wax and sunscreen at least 30 minutes after minoxidil to ensure effectiveness. Avoid showering or exercising for 4 hours post-application.

community Are you meant to apply SPF to the hairline when using tretinoin along the hairline?

in Treatment 1 upvotes 2 years ago

Apply tretinoin at night and minimize sun exposure. Use sunscreen as a last resort due to its messiness and need for frequent reapplication.

community Has the failure to take Finasteride while you had the chance encouraged anyone to take preemptive measures against anything else that might happen?

29 upvotes 3 weeks ago

The conversation discusses regret over delaying finasteride use for hair loss and emphasizes the importance of early preventive measures for health issues, including using sunscreen, taking vitamins, and considering medications like statins. Participants share experiences with finasteride, sunscreen, and other health practices to prevent aging and health problems.

community Are These Babyhairs? (M30, 8.5 Months Fin, 4 Months Min)

8 upvotes 1 month ago

The user has been using oral finasteride and topical minoxidil with tretinoin for hair regrowth, noticing new baby hairs after a shedding phase. Users advise wearing sunscreen or a hat to protect the scalp from sun damage.

community Will minoxidil cause your skin to age from the collagen inhibition?

2 upvotes 7 months ago

Minoxidil is unlikely to cause skin aging at typical doses, and concerns about collagen inhibition are mostly unfounded. Users suggest using sunscreen and tretinoin for skin health, and some combine minoxidil with finasteride for hair maintenance.

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Learn

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learn Scalp Micropigmentation

Can I wear a hat after my scalp micropigmentation treatment? You can wear a loose, clean hat immediately after treatment.
Can I go in the sun after scalp micropigmentation? Avoid direct sun exposure for 2 to 4 weeks after scalp micropigmentation.

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