Field Notes

When estrogen levels drop, lipid synthesis, the collagen matrix, and barrier function all come under pressure simultaneously. What happens biochemically—and which skincare logic science suggests.

As temperatures drop, the skin reorganizes its barrier at a molecular level. What chronobiology and lipid research reveal about seasonal skin changes – and what...

Isotretinoin is considered a glow-up hack on TikTok. What's missing: a sober look at its mechanism of action, risk profile, and the question of when...

In an airplane cabin, humidity drops to desert levels. What this does to hyaluronic acid concentration and the skin barrier – and what care strategy...

IL-17A/F inhibition as a new strategy for hidradenitis suppurativa: How the nanobody sonelokimab mechanistically addresses shave-induced inflammatory lesions in the beard area – and what...

Water-rich make-up formulations can trigger osmotic stress when humidity changes abruptly, destabilizing the skin barrier. Here's what's behind it and how skincare counteracts it.

Two of the most effective brightening agents address the melanogenesis signaling pathway mechanistically in a complementary way—but their combination often fails in practice due to...

Why morning and evening routines are not a convention but a chronobiological necessity: What the skin's circadian clock teaches us about the right time for...

Pollen particles affect the skin far beyond the respiratory tract. Why the extended allergen season creates a sustained cycle of irritation—and how barrier care and...