Home/Ingredients

Every ingredient, and why it's there.

We don't add ingredients for the label. Here is each active we use, the dose the evidence supports, what it pairs with, and where we'd tell you to be careful.

The formulation principle

If an active is on the front of the box but below the preservative on the back, it is there for the box. We would rather name four ingredients we can defend than fourteen we can't.

— How we decide what goes in
Learn to check for yourself

Read a label like a formulator.

Skin notes, four times a year.

No countdown timers, no restock panic. Four considered letters a year on formulation, ingredients and what the evidence actually supports — plus first word on anything new.