Guides

Is Centella OK to Use With Tretinoin? A Layering Guide
Yes. Centella asiatica and tretinoin layer together without any conflict. Read more...
Glycerin for Skin Hydration: How It Works and Why It's Everywhere
Glycerin for Skin Hydration: How It Works and Why It's Everywhere
Glycerin hydrates by pulling water into the outer layer of your skin and holding it there. Read more...
Hyaluronic Acid for Hydration: How It Works and How to Use It Right
Hyaluronic Acid for Hydration: How It Works and How to Use It Right
Hyaluronic acid is a humectant: it grabs water and holds it at the surface of your skin, so your face looks plumper and feels less tight. Read more...
Ceramides and Your Skin Barrier: What They Do and How to Use Them
Ceramides are the fats that make up about half of the lipids between your skin cells, the thin outer layer that holds water in and keeps irritants out. Read more...
Centella Asiatica (Cica): What It Does and How to Use It
Centella Asiatica (Cica): What It Does and How to Use It
Centella asiatica, the plant behind K-beauty's cica products, is used to make stressed skin look and feel calmer. Read more...
Niacinamide Pairings: What to Layer It With, and What to Skip
Niacinamide Pairings: What to Layer It With, and What to Skip
Niacinamide is one of the most forgiving actives you can layer, so the short answer is that it plays well with almost everything: hyaluronic acid, ceramides, peptides, retinol and, yes,... Read more...
Niacinamide and Brighter-Looking Skin: How It Works and How to Use It
Niacinamide and Brighter-Looking Skin: How It Works and How to Use It
Niacinamide is a form of vitamin B3 that can make your skin look brighter and more even by slowing how much pigment reaches the surface. Read more...