Skincare
Science
Evidence-based skincare education from our research team, led by Dr. Sunbin Song (ex-NIH researcher, MIT PhD). From quick tips to deep-dives into active ingredients.
Deep Guide to Collagen - ways to preserve and boost collagen in your skin
Collagen is the key structural protein in our skin — making up about three quarters of its dry weight — and as we age, both the quantity and quality of colla...
Can you use vitamin C with niacinamide? Yes, you can.
You may have heard not to mix Vitamin C and Niacinamide — but the truth is, not only can you use them together, you probably should. Here's the science behin...
Niacinamide (and Niacin) : Stability and Optimum pH
Niacinamide is one of the most stable vitamins in skincare — but there's one critical formulation detail that determines whether it stays effective and gentl...
Can you use Vitamin C and Retinoids together?
Vitamin C and retinoids are two of the most studied, most proven ingredients in all of skincare — and yes, you can absolutely use them together. Here's what ...
What’s the difference between Retinol and Retinaldehyde (Retinal)? And which one should you use?
Retinaldehyde is about ten times more effective than retinol — and despite its high potency, it's remarkably gentle. Here's the science behind why, and how t...
Deep Guide to Niacinamide - How it works and why it should be a part of everyone's skincare routine
Niacinamide (Vitamin B3) is one of the most extensively studied and broadly beneficial ingredients in skincare — and yet it often plays second fiddle to flas...
A (ridiculously) deep guide to how retinoids work (and why we think Retinaldehyde is the best retinoid for your skin)
Retinoids are the most extensively studied anti-aging ingredients in skincare history — but with so many options (retinol, retinal, tretinoin), knowing which...
A (ridiculously) deep guide to getting great skin with Vitamin C
Topically applied Vitamin C is one of the best-proven ways to keep your skin healthy — but with so many products, concentrations, and competing claims out th...