Arctigenin

Arctigenin is a lignan compound extracted from Arctium lappa L. (burdock root), a plant with a long history of use in traditional medicine across Asia. In skincare formulations, it functions as an antioxidant, helping to neutralise free radicals that can contribute to skin damage and premature ageing.

The ingredient has garnered scientific interest in recent years for potential effects beyond basic antioxidant activity. Early research suggests arctigenin may interact with specific inflammatory pathways in the skin, though its use in cosmetics remains relatively niche compared to more established antioxidants.

Arctigenin is thought to work primarily through antioxidant mechanisms, neutralising free radicals that damage skin cells. Beyond this, research indicates it may inhibit phosphodiesterase-4 (PDE4), an enzyme involved in inflammatory signalling within the skin. By modulating this pathway, arctigenin may help reduce the inflammatory cascade seen in conditions like acne and psoriasis.

Some evidence also suggests it may influence immune responses to bacteria associated with acne, though the specific mechanisms are still being investigated. The ingredient appears to have multiple targets within inflammatory pathways, which is why it shows promise across different types of skin inflammation.

Arctigenin is typically found in serums, toners, or treatment products rather than cleansers, allowing for prolonged contact with skin. Since research on optimal concentrations is limited, follow product instructions. It pairs well with other antioxidants and anti-inflammatory ingredients, and can be used daily as part of a routine. If introducing a new product containing arctigenin, start with 3–4 times per week to assess tolerance.