乳制品中的rBGH是什么？
概述
rBGH（重组牛生长激素），又称rBST，是美国奶农用于提高奶牛产奶量的一种合成激素。尽管已获得FDA批准，但该物质在欧盟、加拿大及许多其他国家和地区被明令禁止。其使用与被处理动物的多项严重健康和福利问题密切相关。
核心要点
- rBGH与rBST是同一物质 —— 一种合成激素，模拟垂体自然分泌的生长激素
- 其主要商业用途是提升泌乳期成年奶牛的产奶量
- FDA批准使用rBGH，但在欧盟、加拿大及众多其他国家和地区不被允许
- Monsanto是开发该产品的公司之一
- 使用rBGH处理的奶牛面临50%的跛行风险增加 —— 包括步态异常、蹄部问题及行走困难
- 被处理的奶牛还面临25%的乳腺炎风险增加（频繁的乳房感染），导致农场antibiotic用量增加
- 其他动物健康问题包括不孕不育、卵巢囊肿和出生缺陷
- 建议选择有机乳制品以避免摄入rBGH及其他合成激素
详细说明
rBGH是什么？
rBGH是重组牛生长激素的英文缩写。它是pituitary gland自然少量分泌的一种激素的合成版本。在幼小的牛犊体内，这种激素发挥着真正的生长激素功能。然而，当被注射给泌乳期的成年奶牛时，其主要作用是显著增加产奶量。正是这一用途使其成为奶农商业使用的选择。
监管现状
尽管在美国获得FDA批准，rBGH在世界许多地区已被禁止，包括欧盟和加拿大。这一监管分歧反映了各界对该激素影响动物健康及可能对消费者产生的潜在影响的持续担忧。
动物健康风险
在奶牛中使用rBGH与以下几项有据可查的问题相关：
- 跛行（风险增加50%）： 被处理的奶牛会出现步态和站立姿势异常，同时伴有蹄部退化及行走困难。
- 乳腺炎（风险增加25%）： 乳腺炎是一种频发的乳房细菌感染。由于感染风险升高，使用rBGH处理奶牛的农场往往需要使用更多抗生素，这引发了对antibiotic resistance的更广泛担忧。
- 生殖问题： 被处理的奶牛可能出现不孕不育、卵巢囊肿和出生缺陷。
实用建议
为避免通过乳制品摄入rBGH，建议选择经认证的有机乳制品。有机认证确保了rBGH及其他synthetic hormones未被使用，为您所消费的乳制品提供更清洁的基础保障。
相关概念
- recombinant bovine growth hormone
- rBST
- pituitary gland
- synthetic hormones
- mastitis
- antibiotic resistance
- organic dairy
- milk production
English Original 英文原文
What is rBGH in Dairy Products?
Summary
rBGH (recombinant bovine growth hormone), also known as rBST, is a synthetic hormone used by dairy farmers in the U.S. to increase milk production in cows. While approved by the FDA, it is banned in the European Union, Canada, and many other countries. Its use is linked to several serious health and welfare problems in treated animals.
Key Takeaways
- rBGH and rBST are the same substance — a synthetic hormone that mimics the growth hormone naturally produced by the pituitary gland
- Its primary commercial use is to boost milk production in lactating adult cows
- The FDA approves rBGH, but it is not permitted in the EU, Canada, and numerous other countries
- Monsanto was one of the companies that developed this product
- Cows treated with rBGH face a 50% increased risk of lameness — an abnormal gait, hoof problems, and difficulty walking
- Treated cows also have a 25% increased risk of mastitis (frequent udder infections), leading to greater antibiotic use on farms
- Additional animal health issues include infertility, ovarian cysts, and birth defects
- Choosing organic dairy is recommended to avoid rBGH and other synthetic hormones
Details
What is rBGH?
rBGH stands for recombinant bovine growth hormone. It is a synthetic version of a hormone that is naturally released in small quantities by the pituitary gland. In young calves, this hormone functions as a true growth hormone. However, when administered to adult lactating cows, its primary effect is to significantly increase milk output. This application is the reason dairy farmers use it commercially.
Regulatory Status
Despite FDA approval in the United States, rBGH has been banned in many parts of the world, including the European Union and Canada. This regulatory divide reflects ongoing concern about the hormone’s effects on animal health and potential downstream effects on consumers.
Animal Health Risks
The use of rBGH in dairy cows is associated with several well-documented problems:
- Lameness (50% increased risk): Treated cows develop abnormal gait and stance, along with hoof deterioration and difficulty walking.
- Mastitis (25% increased risk): Mastitis is a frequent bacterial infection of the udder. Because of this elevated infection risk, farmers treating cows with rBGH often need to administer more antibiotics, which raises broader concerns about antibiotic resistance.
- Reproductive issues: Treated cows can experience infertility, ovarian cysts, and birth defects.
Practical Recommendation
To avoid rBGH exposure through dairy consumption, the recommendation is to choose certified organic dairy products. Organic certification ensures that rBGH and other synthetic hormones have not been used, providing a cleaner baseline for the dairy you consume.
Mentioned Concepts
- recombinant bovine growth hormone
- rBST
- pituitary gland
- synthetic hormones
- mastitis
- antibiotic resistance
- organic dairy
- milk production