The Science of Collagen — And Why Dry, Cold Air Speeds Up Its Loss

Collagen breakdown doesn't wait for winter to officially arrive — here's what's already happening beneath the surface, and how to slow it down.

What Collagen Actually Does

Collagen is the most abundant protein in your skin. Think of it as scaffolding: it sits in the deeper layer of skin, the dermis, and gives skin its firmness, bounce, and structure^[14]. Alongside elastin, which lets skin stretch and spring back, collagen is what keeps skin looking smooth rather than crepey.

Your body makes collagen throughout life, but production naturally slows with age — and it can slow further when skin is under stress. Everyday factors that accelerate collagen breakdown include UV exposure, pollution, and dryness.

Why Pre-Winter Conditions Work Against Your Collagen

There's a common myth that skin only ages in summer, from sun exposure, and gets a break once it cools down. In reality, the pre-winter transition puts its own pressure on collagen.

Cooler, drier air increases water loss from skin, and chronically dehydrated skin is less able to support the collagen network beneath it. On top of that, UV rays don't disappear just because temperatures drop — they pass through cloud cover and haze, and they remain one of the biggest drivers of collagen breakdown over time^[7]. Add in hotter showers and heavier fabrics that people reach for as it cools, both of which can strip protective oils from skin, and the season is quietly harder on collagen than most people realize.

What Actually Helps Right Now

You can't reverse years of collagen loss overnight, and any product claiming otherwise isn't being honest with you. But you can support the collagen you have, and slow further breakdown, with a few consistent habits:

• Keep using sunscreen daily, even as the weather cools — UV exposure is one of collagen's biggest threats, in every season.
• Prioritize hydration; dehydrated skin puts more visible strain on the collagen network beneath it.
• Be patient and consistent. Ingredients like niacinamide work over weeks, not days.
• Avoid harsh scrubbing or over-exfoliating, which can irritate skin and interfere with its natural repair processes.