Dermatology.

Does sunscreen actually prevent skin aging?

Not a marketing claim — a randomized trial followed people for four and a half years.

Fungal acne: why your acne routine might be feeding it

Malassezia yeast lives on nearly everyone's skin and eats the very oils many 'nourishing' products are built on. That's why your acne routine can make it worse.

The hyperpigmentation treatment ladder

Red marks, brown marks, and melasma need different tools in a specific order. A tiered plan, from the one non-negotiable step up to prescription territory.

Korean sunscreen filters, explained — and why the US didn't have them

For 27 years the FDA approved no new UV filter, while Korea and Europe formulated with modern ones freely. In June 2026 that finally started to change.

PIE vs PIH: why the color of your acne marks decides the treatment

Red marks and brown marks are different conditions with different fixes — and most 'fade your dark spots' advice only applies to one of them.

Barrier repair 101: what it is, how it breaks, how it heals

Stinging moisturizer, sudden sensitivity, tight flaky skin — half of skincare trouble is a damaged barrier. What that means physically, and the boring routine that fixes it.

Pregnancy skincare: what to drop, what's fine, and what to ask about

Most of your shelf survives pregnancy. A few things genuinely don't. The calm, cited version — to take to your OB, not replace them.

Purging vs breaking out: how to tell, and how long to wait

New product, new pimples. Whether that's a temporary purge or a genuine bad reaction decides whether you push through or stop — here's how to tell.

Fungal acne isn't acne — and that's why your acne routine isn't working

Those small, itchy, uniform bumps that won't quit? They might be Malassezia, a yeast — not bacterial acne.

The skin barrier, and why ceramides matter

Half of skincare problems trace back to a leaky barrier. Here's what that means and what the evidence says about repairing it.