Eriodictyol is a natural flavonoid mainly extracted from the fruit of Citrus limon in the Rutaceae family and the plant of Dracocephalum in the Lamiaceae family.

Plant sources：As one of the most abundant flavonoid glycosides in lemon (Citrus limon), Eriocitrin is mainly distributed in the peel, pulp and seeds, especially in the peel. In addition to lemons, other citrus plants such as lime (Citrus aurantium) and grapefruit (Citrus paradisi) also contain small amounts of holy herb subsides.

Plant sources：Dihydroberberine is a hydrogenated derivative of berberine, the main component of Berberine, which belongs to the isoquinoline alkaloids.