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It is a protein toxin secreted by food poisoning bacteria (Clostridium botulinum). It is divided into seven serotypes (A,B,C,D,E,F,G) according to serotypes, of which only type A and type B were developed as medicines. It inhibits acetylcholine secretion and blocks the transmission of nerve signals that control muscle movement. When injected into muscle tissue, muscle relaxation/paralysis appears after 3 days and lasts for 3 to 8 months. Product Features Dosage Form: Freeze-dried powder Complex Size: 900kDa Product Specification lostrium botulinum toxin type A Unit: 100 units Product Use Temporary improvement of moderate to severe eyebrow wrinkles related to eyebrow wrinkle or eyelid muscle activity