Exposome: how pollution, cold and climate leave their mark on skin
Skincare conversations increasingly mention the exposome, and it's not just a buzzword. It describes all the external factors your skin deals with every day: UV rays, pollution, cold, dry air, smoke, stress and lifestyle. Major cosmetic research groups now see it as a key lens for understanding why skin ages and becomes sensitive. In winter these factors add up, which makes it the right time to understand how to protect your skin.
What exposome means
The term comes from science, where it describes all the environmental exposures a person accumulates over a lifetime. Applied to skin, it shifts the focus from "what skin type do I have" to "what is my skin exposed to". Two people with the same skin type can have very different needs if one lives in the city centre and cycles to work, while the other works in a heated office.
The main factors are:
- Solar radiation: UVA and UVB are present in winter and on cloudy days too; snow reflects part of them.
- Pollution: fine particulate matter and exhaust fumes settle on the skin and contribute to oxidative stress.
- Cold and wind: they slow down the production of skin lipids and encourage dryness and redness.
- Heating and dry air: indoors, humidity drops and skin loses water more easily.
- Lifestyle: sleep, stress and smoking affect the look of your skin as much as the climate does.
How the exposome marks the skin
Many of these factors share a common mechanism: they generate free radicals, unstable molecules that alter barrier lipids and supporting fibres. On top of that, winter weather makes the skin barrier more vulnerable. The most common signs are a dull, greyish complexion, skin that feels tight after cleansing, redness, increased sensitivity and, in the long run, more visible wrinkles and dark spots.
You don't need a complicated routine to deal with them. The most current approach is based on three steps: cleanse well, protect the barrier, neutralise oxidative stress.
How to build exposome defence into your routine
In the morning: defence
- Antioxidants: vitamin C and plant extracts rich in polyphenols and flavonoids help the skin counter free radicals produced by smog and light.
- Hydration: a cream suited to your skin type, richer if cold air leaves your skin dry.
- Broad-spectrum sun protection: the last step, in winter too. If you spend a long time outdoors, reapply it every 2 hours.
In the evening: cleansing and recovery
- Thorough cleansing: removes particulate matter, SPF and make-up residue that build up during the day. Choose gentle cleansers that don't leave the skin feeling tight.
- Nourishing treatment: lipids and soothing actives help the skin regain comfort after a day in the cold.
A practical winter tip: keep a face mist in your bag or at the office. Refreshing your skin during the day helps counter the dehydrating effect of indoor heating. If your skin reacts with persistent burning or redness, simplify your routine and consult a professional.
Recommended Chrissie products
- Antiox Face Mist: a face mist with a pool of antioxidant actives, including hibiscus seeds and red vine extract rich in flavonoids. Ideal as a prep step or as a refresh during the day for skin exposed to environmental stress.
- Daily Shield Drops SPF50: a broad-spectrum sun-protection fluid with a light, watery texture. Hedychium Coronarium extract creates a shield effect that helps mitigate the effects of blue light, infrared and pollution. Perfect as the last morning step, even under make-up.
You'll find more treatments in the Fotoinvecchiamento e protezioni UV and Pelle Stanca e Stressata collections.
In short
- The exposome is the set of external factors (sun, smog, cold, dry air, lifestyle) that affect the look of your skin.
- In winter these factors add up and make the barrier more vulnerable.
- In the morning: antioxidants, hydration and broad-spectrum SPF, reapplied every 2 hours if you're outdoors.
- In the evening: gentle, thorough cleansing, then a nourishing treatment.
