Lemon flavonoids is the use of modern extraction technology to extract from citrus fruits rich in flavonoids (Flavonids) of biologically active substances, based primarily with the general flavonoid rutin and hesperidin (Heperidin) and naringin (Naringin .) Lemon flavonoids with antiviral and antibacterial capabilities, flavonoids hesperidin is a major component of lemon, with a high medicinal value, with cough and asthma, to maintain normal osmotic pressure of blood vessels and reduce blood vessel fragility and shorten the bleeding time effect, hesperidin on isolated intestine are inhibited after the first excitement, that is, vitamin P-like effect. Hesperidin, naringin has anti-inflammatory effects, and paeoniflorin in Paeonia has the same effect, or the synthesis of high sweetness and low calorie sweeteners new dihydrochalcone (Dihydrochalcone) of the main raw material. Lemon flavonoid in scavenging free radicals, improving immunity and anti-tumor with special effects, made with lemon flavonoids have the longevity of elderly health care products, anti-aging effect.