Skin School
How to Choose a Retinol If You Have Sensitive Skin (Without the Irritation)
Retinol is one of the most studied ingredients in skincare — but it's also one of the most misunderstood for sensitive skin. Here's how to get the benefits without the irritation.
Squalane vs. Hyaluronic Acid: What's the Difference and Which One Does Your Skin Need?
Squalane and hyaluronic acid are two of the most popular skincare ingredients right now — but they do completely different things. Here's which one your skin actually needs, and whether you should ...
Prebiotics, Postbiotics and Fermented Skincare: What Do They Actually Do?
What do prebiotics, postbiotics and fermented ingredients do for skin? Explore the microbiome and its connection to hydration and barrier health.
What Is Ectoin? The Stress-Protection Molecule That Makes Sensitive Skin Routines Actually Work
Ectoin is a stress-protection molecule naturally produced by extremophilic bacteria — and one of the most effective ingredients for sensitive, barrier-compromised skin. Onekind Co-Founder Matt Rugg...
What to Look for in a Nighttime Moisturizer: Key Ingredients That Actually Work
If you've ever finished a jar of something that promised overnight transformation and woken up looking exactly the same, the problem is almost always the ingredient list — not your skin. Certain in...