At present, hypericin is usually used in combination with echinacea polysaccharide to prevent and treat viral diseases such as avian influenza. There are Astragalus polysaccharides, Radix Isatidis extract, etc.
Echinacea purpurea extract can be produced by many plant extract manufacturers, but there is no polysaccharide content in the market, which is generally 4% of polyphenols and 2% of cichoric acid. I know a company that not only produces polyphenols and cichoric acid, but also produces 30% polysaccharides. You can contact to buy, or you can contact to buy hypericin, the quality is more reliable. Company name: Henan Guanzhong Jianye Biotechnology Co., Ltd., also a professional Chinese medicine purification production enterprise.