Aging (fine lines)
Separate photoaging evidence from marketing, start a retinoid carefully, and understand what results can realistically look like.
Let's get specific
Ingredients
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.
3 min read
Ingredients
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.
5 min read
Anti-aging & longevity
Does sunscreen actually prevent skin aging?
Not a marketing claim — a randomized trial followed people for four and a half years.
2 min read
Ingredients
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.
2 min read