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LESSON 3 · Skin Science

Ingredients to Skip

Not every popular ingredient deserves your money. Collagen in topical products cannot penetrate skin because the molecule is too large. Most botanical extracts have minimal clinical evidence.

The rule is simple: if an ingredient does not appear in peer-reviewed dermatological research with controlled human trials, treat it as unproven. Marketing teams are creative storytellers. Your skin deserves evidence, not narratives.