Explore Skincare coverage from Nenna Beauty: Skincare explained by ingredient and evidence: routines by skin type, with named dermatological sources.
Skin cycling is a four-night rotating schedule for active ingredients: exfoliant on night one, a retinoid on night two, then two recovery nights with only moisturizer before the cycle repeats. It was formalized by board-certified dermatologist Dr. Whitney Bowe, who describes it as a regimen that…
Antioxidants are molecules that neutralize the reactive oxygen species UV light generates in skin before they damage collagen, DNA, and lipids. A review in the journal Nutrients states that normal skin contains high concentrations of vitamin C, supporting collagen synthesis and antioxidant…
Dark circles are not one condition, so no single cream treats them all. A systematic review of 39 studies in Dermatologic Surgery found effective options include lasers, topical creams and serums, fillers, chemical peels, and surgery, with the right one depending on the diagnosed cause. Matching…
The core winter skin adjustment is behavioral before cosmetic: shorter, warm-not-hot showers and a heavier moisturizer on damp skin, per American Academy of Dermatology guidance. Dermatologist Elizabeth Kiracofe, MD, FAAD explains that dropping temperature and humidity make skin struggle to…
A moisturizer is a topical formulation that hydrates and protects the stratum corneum, typically combining humectants that draw water into the outer layer with emollients and occlusive lipids that smooth and seal it. Per barrier researcher Marie Lodén's review in the American Journal of Clinical…
A cleanser is a surfactant-based formula that lifts oil, sweat and debris off the skin so they rinse away with water. In a review in the Journal of Cosmetic Dermatology, dermatologist Zoe Draelos explains that cleansers are composed of alkaline soaps or the less barrier-damaging synthetic…