Winter creates two simultaneous conditions that skin struggles to manage: cold exterior air that contracts capillaries and reduces skin circulation, and indoor heating that dries air to relative humidity levels that can reach 20–30%. In these conditions, humectants applied without an occlusive evaporate faster than in any other season.

The Effect of Cold on the Skin Barrier

Low temperatures reduce enzymatic activity in the stratum corneum — the same enzymes responsible for regenerating the ceramides and fatty acids that form the lipid barrier. In winter, the barrier regenerates more slowly and is compromised more easily. The result: higher TEWL, greater sensitivity and reactivity.

Essential Winter Adaptations

Add an Occlusive (or Switch to a Richer One)

The same summer routine needs an additional occlusive step in winter. For oily skin: lightweight shea in specifically dry areas (cheekbones, eye contour). For dry skin: switch from light cream to rich ceramide cream as the final night step.

Reduce Water Temperature

Hot water in winter feels good but aggravates exactly the problem the cold created. Lukewarm — not hot — water for all cleansing.

SPF in Winter: The Most Costly Mistake

UVA — responsible for 80% of visible ageing — has the same intensity in winter as in summer. It doesn't depend on temperature or perceived solar warmth. Cloudy winter days only block 20% of UV radiation. SPF is the only step that isn't negotiable in any season.