ELIX-IR
INCI: Polygonum Aviculare Extract
Reviewed by Emma · Last updated 18 Aug 2026
Also known as: Knotgrass Extract, Polygonum Aviculare Extract, IR Protection Complex
Knotgrass extract for protection against infrared radiation damage
Addresses
EWG Safety Score
What Is ELIX-IR?
ELIX-IR is a trademarked ingredient derived from Polygonum aviculare, commonly known as knotgrass. This botanical extract has been specifically developed to protect skin from the damaging effects of infrared radiation.
While UV protection is well understood, infrared radiation from sunlight also contributes to premature ageing by generating heat in the skin and triggering oxidative stress. ELIX-IR helps neutralise these effects and protect the skins structural proteins.
This ingredient is increasingly important in modern sun care formulations that aim to provide comprehensive protection against the full spectrum of solar radiation.
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ELIX-IR is a variant of Polygonum Aviculare Extract, the form you will most often see on an ingredients list.
A plant extract with antioxidant properties that may support skin resilience
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