Ceramides

What it does

Lipids that make up roughly half of the skin's barrier. Replacing them is the fastest way to stop the stinging, flaking and reactivity that follow a damaged barrier.

How to use it

In the moisturiser step, nightly, for at least two weeks before judging. Pair with cholesterol and fatty acids where the formula offers them.

Pairs well with

• Panthenol Vitamin B5 — soothing, humectant, friendly to compromised skin. Read more
• Squalane Lightweight emollient that mimics the skin's own sebum. Read more
• Niacinamide Brightens, regulates oil and helps even skin tone over four to six weeks. Read more