Join the list · poppyproofskin.com
Evidence-based dispatches that translate complex skincare science into plain, actionable words — acne, barrier repair, and sensitive skin. Clinical trials decoded, ingredient lists audited, marketing hype cut through.
What arrives in your inbox
Clinical trials, decoded
The actual studies behind the claims — methods, effect sizes, and what they mean for your skin. In plain language.
Ingredient list audits
Full INCI breakdowns — what each active does, at what concentration it matters, and what's just there for the label.
Acne, barrier & sensitive skin
Focused, practical guidance for the concerns that actually keep people up at night — grounded in cosmetic chemistry.
Hype, cut through
Independent analysis, free of the usual marketing spin. Just the science. Leave anytime.
Written by
Penelope Cole is a cosmetic chemist and independent researcher who translates complex skincare science into plain, actionable language. Through her evidence-based dispatches, she breaks down clinical trials, audits ingredient lists, and cuts through marketing hype to help people understand acne, barrier repair, and sensitive skin.
A few questions
There is no fixed schedule. A dispatch goes out when there is something genuinely worth decoding — never to fill a calendar.
Every claim traces back to the research. Clinical trials, effect sizes, and ingredient science — not marketing copy.
Always. Every email carries an unsubscribe link. No friction.
One last thing
Add your email and the dispatches will find you — evidence-based, independent, and sent only when there's something worth decoding.
