The research foundation behind the Winter Defense Protocol. Every article is original, evidence-based cold climate skin science.
The stratum corneum is a lipid matrix that controls moisture retention and environmental protection. Northern winters impose sustained stress on this structure. Here is what that looks like — and how it can be addressed.
Cold air, wind, and near-zero humidity deplete ceramides and fragment the lipid matrix. Gaps form between corneocytes, moisture escapes, and irritants penetrate.
Ceramides, cholesterol, and fatty acids in the 3:1:1 ratio rebuild the lipid matrix — filling the gaps between corneocytes and restoring barrier structure.
A restored lipid matrix retains moisture, blocks environmental stressors, and maintains barrier integrity through sustained cold climate exposure.
The anti-ageing market is built around actives — retinoids, peptides, AHAs. But without an intact skin barrier, none of them work as well as they should. Here is why barrier integrity is the foundation everything else depends on.
Read full article →The molecules behind cold climate barrier protection.
What the climate does to skin over time.
What the research says about northern climates and long-term skin damage.
Read 70%+ humidity in mild climatesA direct comparison of environmental factors and what they mean for skincare.
Read −15°C typical January training temperatureFor skiers, runners, hockey players, and anyone who trains outside through a northern winter.
ReadThe mechanisms of cold-induced skin damage.
The biology behind visible environmental skin damage and what distinguishes it from normal ageing.
Read 80% UV reflected upward by fresh snowThe contested science behind windburn and what it means for protection.
ReadThe history and traditions behind cold climate skin protection.