Aging (fine lines)
Separate photoaging evidence from marketing, start a retinoid carefully, and understand what results can realistically look like.
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4 articles
Starting retinoids without wrecking your face
Prescription tretinoin has the deepest photoaging evidence, but a retinoid family name is not a guarantee for every formula. Here's a low-drama plan: how much, how often, and what week three should feel like.
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How retinoids work
Retinol, retinal, adapalene, tretinoin — one family, one pathway. Here's the mechanism: how a vitamin-A derivative reaches your genes and rebuilds skin from the inside.
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Does sunscreen actually prevent skin aging?
A randomized Australian trial supports regular sunscreen use for slowing measured skin photoaging. Its hand-skin outcome, population and commercial support help define what the result can—and cannot—tell us.
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Bakuchiol vs. retinol: does the "natural retinol" hold up?
Bakuchiol gets sold as a gentler retinol. One head-to-head trial actually put them side by side.
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