Most anti-pollution skincare relies on antioxidants to mop up free radicals after they have already formed. Malachite extract works differently. It targets one of the primary triggers of free radical production in pollution-exposed skin, before the damage chain begins. Here is the science behind it, and why OSKIA uses it alongside a complementary mineral ingredient for stronger results.
What malachite actually is
Malachite is a copper carbonate hydroxide mineral, the same vivid green stone found in jewellery and ornamental objects. In skincare, it appears as malachite extract, an aqueous preparation derived from the mineral itself. The extraction process isolates the copper complexes that give malachite its functional properties in cosmetic use.
This is worth stating clearly because there is some confusion in the beauty industry about ingredient provenance. Malachite extract is not a synthetic compound designed to sound impressive. It is a genuine mineral extract with a coherent, documented mechanism of action, which is precisely why OSKIA includes it in the CityLife range.
How heavy metal pollution damages skin
Urban air pollution deposits heavy metal ions onto skin with every day of city exposure. Lead, cadmium, and other metallic contaminants from vehicle emissions, industrial activity, and particulate matter accumulate on the skin surface and can penetrate the upper layers of the skin barrier.
These heavy metals are pro-oxidants. They catalyse the formation of free radicals through what are known as Fenton-type reactions, where metal ions react with hydrogen peroxide in the skin to produce highly reactive hydroxyl radicals.1 This is distinct from the free radical generation caused by UV radiation or ozone. Heavy metals create a separate, ongoing source of oxidative stress that continues even after you go indoors, because the metals remain on or in the skin until they are chelated or cleansed away.2 The damage this causes — collagen degradation, inflammation, and accelerated ageing — is cumulative and underappreciated.
What malachite extract does
Malachite extract addresses this mechanism directly. The copper complexes in the extract have chelating properties, meaning they bind to and neutralise the heavy metal ions deposited by pollution. Once chelated, those metal ions can no longer catalyse free radical formation. The damage chain is interrupted at source.3
Beyond chelation, malachite extract also has direct antioxidant activity. The copper complexes scavenge free radicals in their own right, adding a second layer of protection. This dual action — chelation plus antioxidant scavenging — is what distinguishes malachite from a standard antioxidant ingredient like vitamin C, which can neutralise free radicals but does not address the heavy metal trigger.
The mineral duo: malachite and smithsonite
In the OSKIA CityLife Facial Mist and CityLife Anti-Oxidant Concentrate, malachite extract is combined with smithsonite extract, a zinc carbonate mineral. The pairing is deliberate.
Smithsonite extract has different but complementary properties. Zinc carbonate is soothing and barrier-supportive, helping to calm the inflammatory response that pollution triggers and supporting the integrity of the skin's barrier function. Where malachite targets heavy metals and oxidative stress, smithsonite addresses the inflammatory and barrier dimensions of pollution damage. Together, they form a mineral-based dual defence that covers more of the damage spectrum than either ingredient alone.
How to use CityLife with malachite in your routine
The CityLife Facial Mist and CityLife Anti-Oxidant Concentrate both contain malachite and smithsonite extracts, along with astaxanthin, dual-form vitamin C, CoQ10, niacinamide, and MSM. They can be used together as a layered anti-pollution system, applying the Concentrate as a booster into your serum or moisturiser and following with the Mist for an additional antioxidant layer.
Frequently asked questions
Is malachite extract the same as the malachite gemstone?
They share the same mineral source, copper carbonate hydroxide, but malachite extract is an aqueous preparation derived from the mineral, not ground-up stone. The extraction process isolates the active copper complexes.
Can malachite skincare be used daily?
Yes. The CityLife Facial Mist and Anti-Oxidant Concentrate are formulated for daily use. For anyone living or working in an urban environment, daily use is precisely the point: heavy metal deposition from pollution is a daily event, and the chelating protection needs to match that frequency to be effective.
Is CityLife suitable for skin that doesn't have obvious pollution damage?
Prevention is more effective than correction. The CityLife range is designed to be used before visible damage accumulates, not as a response to existing pigmentation or collagen loss.
1. Skroza N, et al. "Past, present and future of fenton chemistry." Drug Metab Rev, 2012.
2. Yoshida M, Satoh M. "Toxicological studies on interactions between essential and non-essential trace elements." J Toxicol Sci, 2011.
3. Pourzand C, et al. "UV-induced decreases in ferritin levels in human skin fibroblasts." Free Radic Biol Med, 1999.
