IPA petitions FDA on requiring CFUs for probiotic labeling

By Stephen Daniells

- Last updated on GMT

Colony forming units (CFUs) are calculated from probiotic plate counts.  Image © iStock / Ca-ssis
Colony forming units (CFUs) are calculated from probiotic plate counts. Image © iStock / Ca-ssis
The International Probiotics Association has submitted a citizen petition to the FDA to require the labeling of probiotic ingredients in dietary supplements as colony forming units (CFUs) instead of by weight.

The petition (docket number FDA-2016-P-3968) states​:  “The amendment to the regulations [21 C.F.R. § 101.36] requested here would help ensure that consumers have the most useful, relevant information with respect to the amount of probiotic ingredients in dietary supplements.”

Colony forming units (CFUs) are calculated from probiotic plate counts, a technique that was developed at the start of the 20th Century. Plate counts are still the gold standard for quantifying viable cells.

Currently, the regulations require the labeling of probiotics by weight per serving (usually in milligrams for probiotics) to give consumers the information they need to evaluate how much “effective” ingredient is in a product. While such an approach may work for vitamins, minerals, fatty acids, botanicals and other dietary ingredients, probiotics are very different.

Dr David Keller, VP of Scientific Operations for Ganeden and a member of the IPA Regulatory Affairs Committee Americas, explained: “According to the World Health Organization (WHO), probiotics are live microorganisms that, when administered in adequate amounts, confer a health benefit on the host. Since they are live microorganisms they are very unique from other dietary ingredients.

“While milligrams (mg) is a meaningful unit of measurement for most dietary ingredients, Colony Forming Units (CFU) is the appropriate unit of measurement for probiotics. The number of mgs of a probiotic has no correlation to the number of CFUs. For example, two products could each contain 50mg of a probiotic, but have very different CFU counts. Efficacy of individual strains are based on clinical data specific to that strain, and have historically, and continue to be reported in CFU.

“The goal of this citizen’s petition is to increase transparency in the probiotic market, by labeling products with a meaningful unit of measure. This change will allow all stakeholders to identify the amount of probiotic in each product, and be able to correlate that with what is required for an efficacious amount, as well as accurately compare different product inclusion levels.”

Global standards

The petition also notes that other government agencies around the world already specifically recommend labeling in CFUs, including Health Canada, the Ministry of Health in Italy, while GRAS notifications and dossiers also state CFUs.

George Paraskevakos, IPA’s executive director, ​told us: ““We are hoping that the entire probiotic industry comments and supports IPA’s citizens petition. Labelling in CFU is very significant to our sector in every way and the time has come that we address this with all the stakeholders involved in the probiotic market.”

The comment period is open until May 17, 2017. 

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2 comments

Plate Counts at end of Shelf Life

Posted by Mike,

In Canada, the cfu counts must be guaranteed at the end of shelf life. So it is not a snap shot, it is worst case scenario. If a product has a 1 year shelf life and reads 5 billion cfu of probiotic; it must have 5 billion VIABLE cfus after that one year. Pretty sure IPA will adopt this for the FDA as they quote Health Canada on the topic.

If the product has more at the time of consumption, bonus for the consumer.

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Plate counts are a snapshot in time

Posted by Michael Larsen,

Labeling CFUs rather than by weight makes good sense for the reasons this article details, but plate count results for various probiotic/fermented foods change over time. At what point in time should the plate count be taken and results published on labeling? The only point in time that should really matter to a consumer is the moment the product is consumed. Any other time is irrelevant, really.

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