Urban air is invisible, but its effects on skin are anything but. If you live or work in a city, pollution is ageing your skin every day through mechanisms most skincare ranges are not designed to address. Here is what is actually happening, and what a genuinely protective routine looks like.
How pollution gets into your skin
Air pollution is not a single thing. It is a complex mixture of particles and gases, each with a different way of causing damage. The most studied in the context of skin are particulate matter (PM2.5 and PM10), nitrogen dioxide (NO2), ozone, and polycyclic aromatic hydrocarbons (PAHs).
PM2.5 particles are particularly concerning because they are small enough to penetrate the skin barrier. Once inside, they trigger oxidative stress and inflammation directly within skin cells. Nitrogen dioxide depletes vitamin E in the skin. Ozone depletes both vitamin C and vitamin E, stripping the skin of its natural antioxidant defences. PAHs take a different route entirely: they activate the aryl hydrocarbon receptor (AhR) in skin cells, which stimulates melanin production and drives a chronic low-grade inflammatory response. The result is increased pigmentation and accelerated breakdown of the skin's structural proteins.
The free radical problem
The unifying mechanism behind most pollution-related skin damage is the generation of reactive oxygen species, commonly called free radicals. Pollution dramatically increases free radical activity in skin cells, overwhelming the skin's natural antioxidant capacity.
When free radicals are not neutralised, they cause oxidative stress. This activates matrix metalloproteinases (MMPs), enzymes that degrade collagen and elastin. It also impairs barrier function, allowing more irritants and particles to penetrate. Research published in the Journal of Dermatological Science confirmed that pollution is a significant driver of premature skin ageing, comparable in impact to sun exposure over a lifetime. The skin you are in at 50 is partly a record of the air you have been breathing since your 30s.¹²
What pollution damage actually looks like
The visible signs of pollution-related skin ageing include fine lines and laxity from collagen loss, uneven skin tone and pigmentation from AhR activation, dullness from compromised barrier function, and a tendency towards congestion as particles sit on the skin surface. If you have noticed that your skin looks different in cities versus when you are in the countryside, that is not imaginary. Studies have found measurable differences in skin ageing markers in women living in urban versus rural environments, even after controlling for sun exposure.¹
Barrier damage creates a compounding problem. When the skin barrier is compromised, transepidermal water loss increases, skin becomes more reactive, and pollutants penetrate more easily. The damage is self-reinforcing without active intervention.
A multi-pronged protection strategy
Protecting urban skin requires more than a good moisturiser. The approach needs to work across four areas: antioxidant defence to neutralise free radicals before they cause damage; barrier support to prevent particulate penetration; anti-inflammatory support to manage the chronic low-grade inflammation pollution induces; and thorough but gentle evening cleansing to remove pollutant residue before it spends the night on your skin.
This is the framework the OSKIA CityLife range was built around. Formulated specifically for urban skin, the three-product range addresses each stage of protection. The CityLife Facial Mist contains astaxanthin, one of the most potent natural antioxidants available, derived from Haematococcus pluvialis microalgae. It also includes dual-form vitamin C (sodium ascorbyl phosphate and ascorbyl tetraisopalmitate), CoQ10, niacinamide for barrier support and anti-inflammatory action, MSM (a sulphur-based compound with anti-inflammatory properties), hyaluronic acid, and both malachite and smithsonite mineral extracts for heavy metal chelation and additional antioxidant activity.
The CityLife Anti-Oxidant Concentrate delivers the same core actives in a more concentrated booster format, designed to be added to your existing routine on high-pollution days or used as a standalone treatment. The CityLife Cleansing Concentrate completes the system, removing pollutant residue at the end of the day without stripping the barrier.
Why OSKIA made this range
OSKIA is a London brand. The CityLife range was not created in response to a marketing trend. It was formulated because the team understood from direct experience and from the science that urban air pollution represents a genuine and under-addressed skin ageing driver. Every ingredient in the range was selected for a specific, evidence-supported function. Astaxanthin's antioxidant capacity is well-documented. Malachite extract works by chelating the heavy metal ions deposited by pollution, preventing them from catalysing free radical formation. Niacinamide's ability to strengthen the skin barrier and reduce inflammation is established across multiple clinical studies.
The range works as a complete system but each product also functions independently. If you are already using a serum you love, the CityLife Mist applies over the top and is compatible with any routine.
Frequently Asked Questions
Do I really need anti-pollution skincare if I don't live in a city?
Pollution is not limited to city centres. Suburban and rural areas are affected by vehicle emissions, agricultural chemicals, and particulate matter that travels significant distances from urban sources. Indoor air quality is also a source of oxidative stressors, including VOCs from cleaning products, furniture, and cooking. That said, the concentration of pollutants is meaningfully higher in dense urban environments, so the benefit of targeted anti-pollution skincare is greatest for city dwellers.
When should I apply an antioxidant mist?
An antioxidant mist is most useful in the morning, applied after your serum and before your SPF, to add a layer of free radical defence before you face the day. It can also be applied throughout the day over make-up. The CityLife Facial Mist is designed for both uses.
Does cleansing really remove pollution from skin?
Yes, but the type of cleansing matters. A thorough double cleanse in the evening, using a product formulated to dissolve both particulate matter and the oily pollutants (PAHs) that bind to skin, is far more effective than a brief rinse. The CityLife Cleansing Concentrate is specifically formulated for this purpose. Incomplete cleansing leaves pollutant residue in contact with skin overnight, compounding oxidative stress during a period when the skin should be in repair mode.
Can anti-pollution skincare be used alongside SPF?
Absolutely, and it should be. UV radiation and pollution work through overlapping mechanisms (both generate free radicals), so using antioxidant-rich skincare underneath an SPF gives you more comprehensive protection than either approach alone. Apply the CityLife Mist before your SPF in the morning routine.
Shop the CityLife Range
- Vierkotter A, Krutmann J. "Environmental influences on skin aging and ethnic-specific manifestations." Dermatoendocrinol, 2012.
- Krutmann J, et al. "The skin aging exposome." J Dermatol Sci, 2017.
- Tian F, et al. "Particulate matter (PM2.5) and associated inflammation, oxidative stress, and age-related eye disease." Invest Ophthalmol Vis Sci, 2012.
- Valacchi G, et al. "Cutaneous responses to environmental stressors." Ann N Y Acad Sci, 2012.
