Explore Routine Login

When (and how) to use EUK 134 0.1% by The Ordinary

Overview

Welcome to our guide on when (and how) to use The Ordinary EUK 134 0.1%.

When to use

We recommend using this product in the morning or evening. 23% of routines created by our community use it in both the morning and evening.

How often

91% of routines created by our community use this product every day.

In your routine

This product is most commonly used as step 5 in a routine. Use our Routine Creator to see where you should use this product in your routine.

Fun Fact

100 routines created by our community use this product.

Apply alone or after water-based serums, before oils or heavier creams. Alternatively, mix with other treatments to enhance their antioxidant capacity significantly. Do not use with highly acidic formulations such as suspensions of ascorbic acid. If irritation occurs, cease use and consult a physician. Use only as directed on unbroken skin. Patch testing prior to use is advised.

We independently verify product and ingredient data. Spot something that seems off? Let us know.

Pair it with

Learn more about the ingredients in this product
Check out our complete breakdown of the ingredients and their benefits/drawbacks

Routine inspiration

Learn more

Check out our complete guide to the ingredients in The Ordinary EUK 134 0.1%.

See the full ingredient explanation