Gluten Contamination of Food

Gluten Free Watchdog no longer recommends GF Harvest as a source of purity protocol oats

Update January, 4, 2023: Gluten Free Watchdog does not recommend GF Harvest as a source of gluten-free oats. Four bags of oat flour (Best by date 06/23, Lot # 0452.001.9.007) tested between 6 and 32 parts per million of gluten. Unfortunately, the manufacturer never responded to an email from Gluten Free Watchdog alerting them to the results.

Until further notice, Gluten Free Watchdog does not recommend GF Harvest as a source of purity protocol oats.

Gluten Free Watchdog recently analyzed […]

Lentils and Gluten Cross Contact

The article Lentils and Gluten Cross Contact by Tricia Thompson, Trisha Lyons, and Amy Keller was published on April 29, 2022 in Frontiers in Nutrition. There is some good news in this brief research report.

If you are interested in watching a brief overview of our findings, please see our short powerpoint video with audio.

If you would prefer to read a summary of the findings, the abstract is pasted below.


Lentils are naturally gluten-free and are recommended for […]

Oat Beverages & Celiac Disease: Why We Are a Bit Concerned

Bottom line: If you drink oat-based beverages, please choose products you trust made using gluten-free oats. Gluten in liquids adds up very quickly.

Background: The part per million level of a product is obviously important BUT it doesn’t tell the whole story. The amount of gluten ingested depends on BOTH the ppm level AND the weight amount of product eaten. Each 1.0 ounce/28.35 gram amount of product ingested at the 20-ppm level provides about 0.57 milligrams of gluten.

What does this […]

Folks with gluten-related disorders: Please don’t eat products from Deland Bakery if they are not labeled gluten-free

Deland Bakery (along with Sami’s Bakery) has used some “creative” labeling over the years. If you are new to a gluten-free diet, please know that folks with a gluten-related disorder should not eat products from either of these bakeries that are NOT labeled gluten-free.

Background information: A couple weeks ago, Gluten Free Watchdog contacted Deland Bakery and asked them to please explain why the Contains statement on products in their natural line includes the verbiage “Wheat, Gluten or Yeast”? This […]

Grading the Canyon Bakehouse Recall

UPDATE: The recall has been amended to include expanded distribution for the Canyon Bakehouse Everything Bagels and now includes Connecticut, Massachusetts, New York, and Rhode Island.


Bottom line: Canyon Bakehouse handled this recall very well. What happened should serve as a lesson for all manufacturers of gluten-free foods. Testing at risk raw ingredients for gluten before they enter the facility should be de rigueur. A dedicated gluten-free facility doesn’t matter if “dirty” ingredients are allowed inside.

My biggest concern at this point is […]

Lessons Learned from 16 Years of Testing Food for Gluten

This video presentation with audio is about 30 minutes long. The focus is on lessons learned from 16 years of testing food for gluten. The positive news is that the vast majority of the hundreds of foods tested through GFWD have tested below 20 parts per million of gluten. There have been a few unwelcome surprises over the years, including the level of cross contact in lentils and the number of products impacted by facial misbranding. We’ve also learned […]

Gluten Cross Contact in a Shared Fryer: Poster Presented at AOAC International Meeting

View full size poster at HERE.

Abstract: Celiac disease patients are dissuaded from eating fried foods cooked in shared fryers at restaurants based on presumed gluten exposure versus evidence-based research that gluten cross contact occurs. Twenty orders of fries cooked in shared fryers with wheat were purchased from 10 different restaurants. Fries and oil were free of gluten-containing ingredients. Fries were sent to Bia Diagnostics and tested in 1-gram duplicates using the Ridascreen Gliadin R7001 sandwich R5 ELISA and the […]

FDA’s Temporary Policy Regarding Certain Food Labeling Requirements: Implications for Those with Celiac Disease

Many of you have reached out about the FDA’s guidance document regarding labeling entitled “Temporary Policy Regarding Certain Food Labeling Requirements During the COVID-19 Public Health Emergency: Minor Formulation Changes and Vending Machines.” The entire document is available at If you haven’t yet read this guidance, it states in a nutshell that during this period of food shortages and supply disruptions, FDA is allowing manufacturers to make certain ingredient substitutions without changing the ingredients list.

Allowed substitutions include those […]

What Does 10 mg of Gluten Look Like?

10 milligrams of gluten per day is generally considered by experts to be a safe amount for individuals with celiac disease. But what does this look like in terms of bread crumbs?

Regular white wheat bread has been reported to contain 12,400 milligrams of gluten per 100 grams (or 124,000 parts per million of gluten). Assuming this is accurate, a one-ounce slice of regular bread would contain 3,515 milligrams of gluten.

Based on this assumption and using a nonscientific scale: […]