Testing for Gluten Contamination

Fermentation Growth Mediums for Yeast and Concerns about Residual Gluten

Gluten Free Watchdog recently received a question about the yeast used in a Crispin (Miller-Coors) hard cider certified gluten-free by GFCO. Neither GFCO nor Miller-Coors would disclose the growth medium used for the yeast.

Yeast testing: In an attempt to learn more about residual gluten protein in yeast grown on gluten-containing growth mediums Gluten Free Watchdog tested White Labs Pilsner Yeast cultured in a solution containing barley malt for gluten. This yeast is NOT labeled gluten-free. But, according to the […]

Lateral Flow Devices (Nima, Gluten Tox Home, EZ Gluten) to test food for gluten: Manufacturer & Consumer Use

This article was originally published in 2012 on glutenfreedietitian.com. Due to the marketing of the new consumer lateral flow device (LFD) NIMA there is a renewed interest in LFDs. An updated version of the article is republished here. If you are a manufacturer or consumer who currently uses or is thinking of using a LFD please take the time to read this article.

 Thank you to Thomas Grace of Bia Diagnostics, www.biadiagnostics.com and Adrian Rogers of Romer Labs https://www.romerlabs.com/ for sharing their […]

Using Nima to test mustard for gluten contamination

The video is embedded below. First a recap of Nima testing to date …

Sampling methodology for Nima: Gluten Free Watchdog has been assessing Nima’s sampling methodology. Users are advised to place a small sample of food inside a disposable capsule. A small sample is defined as “pea sized.”

In the opinion of Gluten Free Watchdog, this sampling method is not well suited for testing packaged foods that may have heterogeneous (unevenly distributed) gluten contamination or restaurant meals with spotty cross […]

Mystery Grain in Edison Grainery Lentils Tests “Low Gluten” Using Nima

This post is an update to the blog posted on December 13th entitled “General Product Warning: Check Your Lentils (including certified gluten-free lentils) for Foreign Grain” available at https://www.glutenfreewatchdog.org/news/general-product-warning-check-your-lentils-including-certified-gluten-free-lentils-for-foreign-grain/

Long story short: A consumer found a single errant grain in each of two bags of Edison Grainery certified gluten-free lentils. Photos of the grain were sent to Edison Grainery. The consumer was advised that the grain was likely wild oat, oat, or rice. Gluten Free Watchdog sent one of the […]

Gluten Free Watchdog comment: Australian study on the gluten content of imported food

The Gluten Free Watchdog community has reached out to me regarding the study “Gluten content of imported gluten-free foods: national and international implications “published in the Medical Journal of Australia in October. This is a short report and the full text is available at https://www.mja.com.au/system/files/issues/205_07/10.5694mja16.00485.pdf

The main question being asked about the study is why the researchers report testing to 1 part per million of gluten while Gluten Free Watchdog tests to 5 parts per million of gluten. By way […]

Must Read Study Courtesy of Quaker on Testing Oats for Gluten

Gluten-containing grains skew gluten assessment in oats due to sample grind non-homogeneity. Fritz RD, Chen Y, Contreras V. Food Chemistry. February 2017;216:170-175. Published online ahead of print August 12, 2016.

Disclosure: The authors declare that they have no competing interests. Ronald D. Fritz, Yumin Chen, and Veronica Contreras are salaried employees of PepsiCo Inc. or Quaker Foods and Snacks (QFS), a subsidiary of PepsiCo, Inc., which funded this research. QFS has a commercial interest in gluten-free foods.

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What follows is a […]

Nima, the Portable Food Testing Device

Gluten Free Watchdog receives at least one question each week about Nima asking our opinion on the testing device. Included below is the email sent to subscribers to GFWD in June. You also may be interested in listening to a GFWD video about some of the complexities associated with testing food for gluten. It is available HERE.

Nima: Many of you continue to have questions about Nima, the portable food testing device in development by 6 Sensor Labs. GFWD has […]

Gluten Content of Gluten Digestive Enzyme Supplements: A Very Brief Summary

This is not a commentary about whether individuals with gluten-related disorders should use gluten digestive aids or whether there is any benefit to these supplements. For an excellent article on enzymes and current medical thinking, please see the interview conducted by NFCA available HERE. 

As many of you know Gluten Free Watchdog has been sending various “glutenase” enzyme supplements to the lab for gluten testing. Initial results were very troublesome. But based on additional testing following a modified testing protocol, […]

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