Antioxidant Effects

Every time sunlight hits your skin, it generates free radicals — unstable molecules that damage collagen, degrade cell membranes, and accelerate aging. Your skin has built-in antioxidant defences, but UV exposure, pollution, and inflammation can overwhelm them. Antioxidants neutralise these free radicals before they cause harm.

Peat is one of the most antioxidant-rich natural materials on Earth. Its phenolic compounds, humic acids, fulvic acids, and tannins all contribute — and they work through two distinct pathways simultaneously.

How it works

Direct scavenging. Phenolic compounds in peat have hydroxyl groups (–OH) attached to aromatic rings. These groups donate hydrogen atoms to free radicals, stabilising them before they can attack collagen or cell membranes. This is the same mechanism behind vitamin C and vitamin E — but peat contains hundreds of different phenolic structures, providing broader coverage than any single antioxidant.

Metal chelation. Free iron (Fe²⁺) and copper (Cu²⁺) ions are potent catalysts for free radical generation — they drive the Fenton reaction, which produces the most destructive hydroxyl radicals. Humic acids and fulvic acids chelate these metal ions, locking them up so they can’t catalyse oxidative damage. This is indirect but powerful: instead of neutralising free radicals one at a time, chelation prevents thousands from being generated in the first place.

A recent study showed that sphagnum-derived phenolics activate the Nrf2 antioxidant pathway in vivo — essentially switching on the body’s own antioxidant defence system rather than just supplementing it from outside (Laorodphun 2024). The same study found reduced MDA (a marker of lipid oxidation damage), confirming that the antioxidant effect translates from the test tube to living tissue.

Why it matters

The antioxidant mechanism is most relevant for:

• Skin aging — UV-generated free radicals are the primary driver of photoaging: wrinkles, loss of elasticity, and pigmentation changes. Peat’s antioxidant compounds scavenge these radicals and chelate the metals that amplify UV damage (van Rensburg 2015, Tarnawski 2006). A manufacturer trial of a commercial peat mask reported a 70% reduction in crow’s-feet wrinkle depth and an 11% elasticity gain, attributed by the supplier to this antioxidant pathway — unpublished and small-scale, but consistent with the mechanism (innovation-company-2020).
• Psoriasis and eczema — oxidative stress is elevated in inflamed skin. Antioxidant delivery complements the anti-inflammatory mechanism: one reduces the inflammatory signals, the other mops up the oxidative damage those signals cause.
• Dry skin — oxidative damage to skin lipids contributes to barrier dysfunction. Protecting those lipids helps maintain the moisture barrier.

The antioxidant and anti-inflammatory mechanisms are deeply intertwined. Inflammation generates free radicals. Free radicals amplify inflammation. By addressing both simultaneously, peat interrupts a vicious cycle that single-mechanism treatments cannot.

The evidence

In-vitro antioxidant capacity of humic and fulvic acids is well-documented using standard assays (DPPH, ABTS, ORAC) — the compounds reliably neutralise free radicals in controlled settings (Winkler 2018, Tarnawski 2006). The Nrf2 pathway activation shown by Laorodphun (2024) is the strongest evidence that this translates to living systems. Clinical evidence specific to peat’s antioxidant benefits on human skin remains preliminary — the lab data is convincing, but the human trials haven’t been done yet.