Cosmetics
Cosmetic ingredients, routines and protocols graded by evidence: working concentrations, skin-type limits and marketing claims without clinical support
Cosmetics during breastfeeding: what to avoid and what is safe
Skin Cycling: What the Evidence Actually Says vs. What TikTok Sells
Legacy SPF filters: what to replace in 2026
How to read INCI: Evigrade traffic light for any cream
Retinol or bakuchiol: what actually works in 2026
Post-retinoid barrier repair after tretinoin and adapalene: what works and what makes irritation worse
Salicylic acid during pregnancy: what's allowed and what isn't
Hyaluronic Acid in Skincare: Which Form Works and What's Just Marketing
Azelaic Acid: What the Evidence Actually Shows and Who It's For
Oxybenzone and octocrylene: why they get banned
Why cream pills up: 5 signs in the ingredient list
Retinoids in pregnancy: what's actually risky
Niacinamide and vitamin C: why the incompatibility myth is wrong
About this section
This section covers cosmetic formulations, active ingredients, and skincare protocols. Most industry claims of 'anti-aging,' 'restoring,' or 'nourishing' lack clinical proof – SCCS and FDA approval addresses safety, not efficacy. Full clinical evidence exists for a narrow set of compounds: retinoids and derivatives, niacinamide, azelaic acid, AHA/BHA acids, vitamin C, hyaluronic acid, ceramides, peptides, and SPF filters. Articles cover active ingredients by evidence level, working concentrations, restrictions by skin type and condition (rosacea, acne, sensitive skin, pregnancy), routine combinations and conflicts, and marketing pitfalls and claims without PubMed-indexed support.