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Journal · Science

Reading Concentrations: A Gentle Guide

'2% retinol' and '0.2% retinol' can both be good — or bad. Concentration on its own tells only half the story.

Percent is not quality

Start with a plain reading of the heading: percent is not quality. What that means in practice — for a customer choosing a product or starting a routine — is less theatrical than marketing usually implies, and more useful.

The practical test is simple: pick it up tomorrow, and the day after. Something that lasts a week outlasts something that only looks good in a photo.

Delivery matters as much as dose

Start with a plain reading of the heading: delivery matters as much as dose. What that means in practice — for a customer choosing a product or starting a routine — is less theatrical than marketing usually implies, and more useful.

There is a quieter version of every skincare claim. We prefer the quieter one — it is the one that holds up when you read the label in daylight.

When higher is actually lower

Start with a plain reading of the heading: when higher is actually lower. What that means in practice — for a customer choosing a product or starting a routine — is less theatrical than marketing usually implies, and more useful.

None of this is a medical promise. It is the craft of making a formula feel right on skin, and making a routine one can actually keep.

In closing

REWYNE is designed and manufactured in Hong Kong, China. Thanks for reading — and for giving us a few minutes of your attention.

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