Beauty · 2 audits

Retinol — Verified Audits

Retinol potency hierarchy: Retinaldehyde (retinal) is 11× more potent than retinol, and close to tretinoin without prescription. Granactive Retinoid (retinyl retinoate) is gentle and stable. Budget dupes that use retinyl palmitate are essentially inactive — it requires so many conversion steps that measurable skin effect is negligible. Always check INCI: 'retinol', 'retinal', or 'retinaldehyde' are the active forms.

Retinol material texture

Audits using Retinol

Chrono-Peptide Night Serum Guide: CLOCK Gene Science & The $14 Matrixyl Match

BMAL1 and PER1 genes control your skin's 11pm–3am repair window. Sisley's chrono-peptide serum ($300) uses Palmitoyl Tripeptide-7 at ~0.5%. The Ordinary Matrixyl 10% delivers 10% concentration for $14.

The $80 Luxury Travel Kit vs The $15 Refillable Science Hack: INCI Stability Audit

Which actives survive TSA heat? L-Ascorbic Acid and Retinol fail above 25°C. Bifida Ferment and Matrixyl are stable to 40°C. The complete decanting guide with Muji container specs.

What is Retinol?

Vitamin A in its topical form. The most evidence-backed anti-ageing active in skincare. Retinol must be converted to retinoic acid by skin enzymes to exert effects — making it gentler but slower than prescription tretinoin. 0.025–0.1% for beginners; 0.3–1% for experienced users. Must be used at night; degraded by UV light.

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