background:
Ractopamine is a drug that is used as a feed additive to promote leanness in pigs raised for their meat. Pharmacologically, it is a beta-adrenoceptor agonist. It is the active ingredient in products known as Paylean for swine and Optaflexx for cattle, developed by Elanco Animal Health, a division of Eli Lilly and Company, for use in food animals for growth promotion.
Important Note:
This product as supplied is intended for research use only, not for use in human, therapeutic or diagnostic applications.
Paylean是一种饲料添加剂，是美国Elanco Lilly公司的注册商标并被美国FDA于今年7月份批准生产仅在养猪生产中使用，它能进一步提高肌肉组织生长速度和效率。它含有莱克多巴胺的盐酸盐，是提高肌肉蛋白生长和饲料效率的小分子。Ractopamine是phenethanolamines成员之一。Paylean不是一种激素、类固醇、抗生素，也不是生物工程产物。它已经被证实在150~48的最后90磅体重期间的饲料中添加4.5~18克/吨，已经被美国食品药物管理局广泛而反复评估了其有效性和安全性。大量的试验证明ractopamine添加量在18克/吨在商品猪上市前90磅的效果。在这些试验中，ractopamine提高无脂瘦肉34%。Ractopamine在提高生长速度的同时降低了采食量。第10肋背膘厚降低13.7%,瘦肉量提高11%，屠宰率能从73.3%提高到74.4%，产生增加1.5%的效果。
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