Ingredient Science
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Azelaic Acid: The Multi-Tasking Acid Dermatologists Love
One acid, three conditions, strong clinical evidence. Here’s what azelaic acid actually treats, how it works, and why it’s safer than most alternatives.
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Your Eye Cream Runs on Caffeine: Here’s What It’s Really Doing
Caffeine is everywhere in eye creams and body serums, but does it live up to the hype? We break down the real mechanisms, the evidence, and the myths.
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Peptides vs. Retinoids: Two Paths to the Same Destination — and Why You Might Want Both
Peptides and retinoids both target collagen and aging, but they work differently. Here’s how each one works, and how to use them together.
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Vitamin C Skincare Guide: L-Ascorbic Acid, Derivatives, and Stability Explained
Not all vitamin C is equal, and some forms oxidize before they even reach your skin. Here’s how to choose the right form, read the label, and get results.
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AHA vs. BHA vs. PHA: How to Pick the Right Exfoliating Acid for Your Skin
All three exfoliate, but they’re not interchangeable. BHAs are the only acids that get inside a pore. AHAs work on the surface. PHAs barely penetrate at all, which is exactly why sensitive skin loves them. Here’s how to pick the right one.
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The Vitamin A Ladder: Which Retinoid Is Right for Your Skin?
Which retinoid can your skin actually handle? From gentle retinyl esters to prescription tretinoin, the vitamin A family works on a ladder of potency.
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How to Read a Skincare Ingredient List: The INCI Decoder Guide
Learn the rules cosmetic chemists use to read an ingredient list, and you’ll never be fooled by a “hero ingredient” that’s barely in the bottle.