Ingredient
Niacinamide
A form of vitamin B3 used in skincare for barrier support, oil-related concerns and uneven appearance.
Evidence Level: Moderate
Ingredient
Salicylic acid
A beta-hydroxy acid used in cosmetic exfoliants and regulated acne products, with concentration- and jurisdiction-dependent requirements.
Ingredient
Ceramides
Ceramides are skin-identical lipid families important to barrier structure and moisture retention, and are commonly used in moisturizers and repair creams.
Ingredient
Hyaluronic acid
A water-binding glycosaminoglycan used in topical moisturizers, injectable products and oral supplements—three very different evidence categories.
Product Review
At-home LED masks: an evidence and safety guide
A practical guide to evidence, wavelengths, dose, eye protection, pigmentation risk and the questions to ask before buying an at-home LED mask.