2018年9月6日，美国食品药物管理局（FDA）发布指南草案，除了法规要求的定量重量外，允许公司在膳食补充剂标签中以菌落形成单位（CFU）标明含有的活微生物数量。CFUs是饮食成分中活微生物数量的单位。允许公司在膳食补充剂的标签中标明CFU将有助于消费者识别每种产品的活微生物数量，更容易与其他产品相对比。
部分原文报道如下：
The FDA also issued a response to a citizen petition from the International Probiotics Association requesting that we amend 21 CFR 101.36 to allow probiotic ingredients to be labeled by CFUs instead of by weight. FDA denied the request to amend our regulations, in order to allow for further evaluation of methods to enumerate live microbials. In the meantime, we believe that the draft guidance regarding our intent to exercise enforcement discretion will allow consumers and health care professionals to benefit from the declaration of live microbials in CFUs in addition to weight in the Supplement Facts label.
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