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59 evidence-led explainers on skincare ingredients, formulation and routines — newest first · page 5 of 5.
A nicotine patch and a moisturiser both sit on skin, but one is engineered to reach your bloodstream and the other was never meant to. That distinction is why 'deep penetration' skincare claims almost never mean what the marketing implies.
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Over-exfoliation causes the same symptoms it's supposed to fix — oiliness, texture, breakouts — which pushes people to exfoliate harder. Here's how the feedback trap works and what appropriate exfoliation actually looks like.
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Every moisturiser claims to "restore" or "strengthen" the barrier. Barrier repair is actually one of the few skincare claims with genuinely clear evidence behind it — but the evidence points to a specific combination, not a vague botanical blend.
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Stinging products, sudden dryness, a rough texture and shiny-but-tight skin are all barrier distress signals — not signs you need to exfoliate harder. Here's how to spot the pattern and what it means for your routine.
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Liposomes, nanoparticles and cyclodextrins are genuine delivery technologies with real research behind them — and also some of the most reliably overstated words on a skincare label. Both things are true at once.
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Copper peptides and Matrixyl have genuine clinical evidence behind them. 'Topical Botox' peptides mostly don't. Here's a category-by-category audit of what the research actually supports, and why in vitro results can't be trusted at face value.
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Two products can list the same active at the same percentage and behave nothing alike. pH, stability, vehicle and penetration enhancers decide what actually reaches your skin — the label doesn't.
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One number quietly decides whether an ingredient can physically reach your skin at all. Here's what the 500 Dalton rule actually means for hyaluronic acid, collagen, peptides, and every 'deep penetration' claim on the shelf.
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Skin is built to keep things out, so how can a serum change anything? The answer is that skin is selective, not sealed — and a handful of physical rules decide what gets through.
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Rosacea gets bundled into generic 'sensitive skin' advice, but it's a specific, diagnosable condition with its own subtypes, triggers and treatments — recognising which subtype you have changes what actually helps.
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Antioxidants get pitched as a redness cure-all, but the evidence for calming inflamed, reactive skin is real for only a handful of them — and even then, it's supporting evidence, not a treatment.
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