Why your sunscreen pills under foundation: the silicone problem
Sunscreen pilling is a polymer-film failure. Here's the silicone chemistry behind it, and the three changes that actually fix it for good.
May 8, 2026 · Maya Chen
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#ingredient science
Every article tagged ingredient science, newest first.
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product-science -
product-science Niacinamide and vitamin C: the incompatibility myth, debunked
The rule against layering niacinamide with vitamin C traces to old tube-test chemistry. Here is what actually deactivates ascorbic acid, and what does not.
May 7, 2026 · Maya Chen
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product-science What peptides actually do in your moisturizer (and don't)
Peptides are sold as 'Botox in a bottle', but the evidence base is thinner than for retinoids. Here is what each class actually does on real skin.
May 7, 2026 · Maya Chen