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Polygonum Aviculare Extract

Also-called-like-this: Knotgrass Extract, Elix-IR
What-it-does: antioxidant, emollient


A flavonoid-rich plant extract coming from knotgrass that is claimed to protect the skin from both UV and Infrared damage.  By now it's pretty well-known that UV-light is the number one external skin-aging factor, however, *sigh* it looks like UV is not the only kind of light that causes bad things to happen to the skin.

Infrared light (760 nm to 1 mm) is the spectral band above visible light and there is some research concluding that it can accelerate skin aging via multiple mechanisms, one of them being the stimulation of the production of evil collagen-destroying enzymes called matrix metalloproteinases (MMP).

Therefore, protecting the skin from infrared light is probably a meaningful thing to do even though there are currently no proven ways to do so. As for Knotgrass Extract, we only have the manufacturer's claim that says it can inhibit Cathepsin G, an enzyme involved in photoaging and thus modulating the origin of sun and infrared induced MMP production.

The manufacturer also did in-vivo tests to show that a 2% Elix-IR lotion, used twice a day for 28 days can increase skin firmness (by 11.9%) and elasticity (by 4.8%) and visibly reduce the appearance of wrinkles (by 20%) and smoothes the surface of the skin.

Show me some proof

  • Cho, Soyun, et al. "Effects of infrared radiation and heat on human skin aging in vivo." Journal of Investigative Dermatology Symposium Proceedings. Vol. 14. No. 1. Elsevier, 2009.

Products with Polygonum Aviculare Extract

Moraz Body Oil Skin Saver FlawlessCanvas Free Radicals Scavenger Hey Honey 911 Pro Gel MAKE Moonlight Primer MUKTI Vitamin Booster Vital C Elixir Sachi Pro Resilience Serum Sachi Pro Resilience Serum Hey Honey Good Night - Vitamin E & Coenzyme Q10 Night Serum LILAH B. Aglow™ Face Mist minimalist Rose Hydra Boost ClearChoice ISO Moisture Kristina Holey + Marie Veronique Soothing B3 Serum RoC Multi Correxion Revive + Glow Vitamin C Night Serum Capsules RoC Multi Correxion Revive And Glow Daily Serum RoC Retinol Correction Wrinkle Correction Serum Dermtella Tinted Sunscreen SPF 46 Kristina Holey + Marie Veronique Intensive Repair Serum Moraz Body Lotion Pomegranate & Polygonum DRMTLGY Broad Spectrum SPF 45 DRMTLGY Universal Tinted Moisturizer Spf 46 Gracederma Ray Back Sunscreen Hey Honey Good Night Royal Honey Facial Moisturizing Replenisher Live Clean Face Mineral Sunscreen Spf 45 Oumere UV-R Prana Spaceuticals BanAcne Recovery Lotion SkinMedica Essential Defense Everyday Clear Broad Spectrum Spf 47 SkinMedica Total Defense + Repair SPF 50+ Sunscreen Your Best Face (YBF-Skincare) Nourish Eye Cream Anna Lotan Mineral Hand Cream Lise Watier Age Control Supreme La Crème Sublime Légère NIOD Survival 0 Rose Inc Solar Power Luminous SPF 30 Serum SeboCalm Young Mud Mask SkinMedica Neck Correct Cream Viseger Pharma Vitamina C 50+ DRMTLGY Anti Aging Clear Face Sunscreen And Facial Moisturizer DRMTLGY Broad Spectrum Spf 45 ClearChoice CopperICE Cream DRMTLGY Universal Tinted Moisturizer Spf 46 Limelife by alcone Skin Therapy Live Clean Baby Mineral Sunscreen Spf 45 Live Clean Sport Mineral Sunscreen NCN PRO SKINCARE Pure Radiance SPF30 SkinMedica Lumivive Algotherm Crème De Vie Marine Beverly Hills MD Repair + Reverse Daily Serum™ Deutsche Pharma Solactive Fluido I.r. FPS 50+ Noreva Bergasol Expert 50+ Fluid Cream Invisible Finish Skin Medica Skinmedica Total Defense + Repair Spf 50 Water-Resistant SkinMedica SKINMEDICA TOTAL DEFENSE AND REPAIR SPF 34