Houttuynia Cordata Extract (1,000Ppm)
Houttuynia cordata extract is derived from the herb Houttuynia cordata (family Saururaceae), a flowering plant native to Southeast Asia with a long history of use in traditional Chinese medicine. Its main active components are polyphenolic flavonoids — including quercetin, quercitrin, hyperoside, and rutin — which exhibit anti-inflammatory, antioxidant, and antibacterial properties. The extract also contains polysaccharides composed of various sugar units that function as humectants. The flavonoid profile can vary depending on whether the extract is sourced from roots or leaves, and whether water or alcohol extraction is used.
The flavonoids in the extract provide antioxidant, anti-inflammatory, and antibacterial benefits, while quercitrin has been shown in one study to help reduce UVB-induced oxidative damage. The polysaccharide fraction acts as a humectant, helping skin retain moisture. An in-vitro study also found strong anti-allergic effects, suggesting potential usefulness for sensitive or eczema-prone skin.
The active flavonoid content of the extract can vary significantly based on the plant part used (roots vs. leaves) and the extraction method (water vs. alcohol), which may affect consistency of efficacy across products.
