
Why pH chasing in skincare layering is mostly anxiety
TL;DR: The internet rule that you must wait twenty or thirty minutes between products to “let the pH stabilize” is mostly anxiety…
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TL;DR: The internet rule that you must wait twenty or thirty minutes between products to “let the pH stabilize” is mostly anxiety…

TL;DR: The number 5.5 became gospel because one cosmetic company put it on a bottle in the 1980s. The actual range of…

TL;DR: Perioral dermatitis is one of the few conditions where the wrong treatment makes it dramatically worse, and topical steroids are the…

TL;DR: In the United States and the EU, “fragrance-free” has almost no enforced definition, and brands routinely use scented botanicals or fragrance-masking…

TL;DR: The chest gets a fraction of the sebum production of the face, less than a third of the sunscreen, and almost…

TL;DR: Almost everyone has slightly higher sebum on the central face than on the cheeks. The marketing category called combination skin treats…

TL;DR: Caffeine constricts blood vessels and reduces fluid in the surrounding tissue. That is a real mechanism with measurable effects, which is…

TL;DR: Most over-the-counter acne scar products do not say which kind of scar they are treating, which is why most of them…

TL;DR: Tranexamic acid is a prescription antifibrinolytic drug, used in surgery to control bleeding, and used at five hundred to one thousand…

TL;DR: The fastest-growing patient population I see for barrier damage is teenagers. Twelve and fourteen year olds with the same constellation of…