Instant Plumping Hydration.

Our reformulated Hyaluronic Acid 2% + B5 now contains 5 forms of hyaluronic acid and added ceramides for all-day hydration.

Not sure where to start?

Our most-loved serum, reformulated.

Our Best,
Made Better.

Learn how we've improved the texture of our best-selling Hyaluronic Acid 2% + B5 for a lightweight feel and instantly smoother feeling skin.

The Ordinary Best Sellers
The Ordinary Ingredient Glossary

The Importance of Hydration for Barrier Support.

No matter your skin type or skin concern, finding the right moisturizer takes just a few steps. It starts here.

The O. Blog.

Meet the Newly Reformulated
Hyaluronic Acid 2% + B5.

Meet the Newly Reformulated Hyaluronic Acid 2% + B5.

Discover the journey behind the evolution of our most-loved hydration serum and the science behind our latest formulation.


The Science
of Hydration.

The Ordinary at #CPHFW

Learn more about how to identify your skin's hydration needs plus ingredients and regimens to support.


Ingredient Deep Dive:
Hyaluronic Acid

Product Spotlight: Glycolic Acid Exfoliating Toner

Do you know Hyaluronic Acid works? Learn more about its key features and skin benefits here.