Antioxidant Effects

Antioxidant activity in peat is driven primarily by phenolic compounds, including humic acids, fulvic acids, tannins, and free phenolics. These compounds neutralize reactive oxygen species (ROS) by donating hydrogen atoms from their hydroxyl groups, and by chelating pro-oxidant metal ions (Fe²⁺, Cu²⁺) that catalyze ROS generation.

Mechanism

Two primary pathways: (1) direct free radical scavenging via hydrogen atom donation from phenolic –OH groups, and (2) indirect protection via chelation of transition metals that would otherwise catalyze Fenton and Haber-Weiss reactions generating hydroxyl radicals. The dual pathway provides broader antioxidant coverage than single-mechanism antioxidants.

Clinical Significance

Oxidative stress plays a role in skin aging, inflammatory skin conditions, and barrier dysfunction. Topical delivery of antioxidants from peat may protect skin cells from UV-induced and inflammatory oxidative damage. This mechanism is complementary to the anti-inflammatory effects — reducing both the inflammatory stimulus and the oxidative damage it causes.

Evidence Quality

In-vitro antioxidant capacity of humic and fulvic acids is well-documented using DPPH, ABTS, and ORAC assays. Clinical evidence for skin-specific antioxidant benefits from peat application is preliminary — the in-vivo translational evidence is limited.