how much gluten is in guinness

When it comes to enjoying a cold pint of Guinness, many people with gluten sensitivities or celiac disease often wonder about the gluten content in this iconic Irish stout. The brewing process involves barley, which contains gluten. Therefore, it’s important to understand the amount of gluten present in Guinness and how it can affect those with gluten-related conditions.

Is Guinness Safe for People with Gluten Sensitivities?

Despite being brewed with barley, Guinness goes through a unique process that significantly reduces its gluten content. According to the company, their research indicates that Guinness contains less than 20 parts per million (ppm) of gluten after the brewing process. This is well below the 20 ppm threshold set by the Codex Alimentarius Commission for gluten-free products. However, it’s important to note that different individuals may have varying degrees of sensitivity, and those with severe gluten allergies should exercise caution.

The Brewing Process and Gluten Extraction

The brewing process of Guinness involves several key steps that contribute to reducing the gluten content:

  • Malted barley is roasted, which can help break down gluten proteins.
  • Hot water is added, activating enzymes that further break down gluten.
  • The wort is boiled, which can denature gluten proteins.
  • Hops and yeast are added for fermentation.
  • Finally, the beer undergoes a filtration process that removes additional solids, including gluten.

Despite these measures, trace amounts of gluten may still remain in the final product, hence the disclaimer by Guinness.

Cross-Contamination Concerns

While Guinness takes precautions to minimize gluten content, cross-contamination can still occur during brewing or packaging. For individuals with severe gluten sensitivities, even trace amounts of gluten can trigger symptoms. Cross-contamination can happen at any stage of production, including the sourcing of ingredients or handling during bottling and packaging.

People with celiac disease or extreme gluten sensitivities should contact the manufacturer to gain a better understanding of their specific practices and protocols to mitigate cross-contamination risks.

Alternative Guinness Options

If you’re looking to enjoy a gluten-free beer experience without compromising on taste, there are alternative options available:

  • Gluten-Free Beers: Several breweries produce gluten-free beers using alternative grains like corn, rice, or sorghum. These beers are specifically formulated to be gluten-free and offer a wider range of choices for gluten-sensitive individuals.
  • Gluten-Reduced Beers: Some breweries use enzymes that break down gluten during the brewing process, reducing its overall content. These beers may still contain trace amounts of gluten and may not be suitable for all individuals with gluten sensitivities.

Always read product labels and consult with the manufacturer to ensure your chosen beer meets your specific dietary needs.

Consulting a Healthcare Professional

As with any dietary concerns, it’s always advisable to consult a healthcare professional or a registered dietitian for personalized guidance. They can help assess your specific sensitivity level and provide recommendations to ensure your dietary choices align with your health requirements.


While Guinness aims to minimize gluten content during the brewing process, it is important for individuals with gluten sensitivities or celiac disease to evaluate their own tolerance levels. Guinness states that their beer contains less than 20 ppm of gluten, meeting the criteria for gluten-free products. However, trace amounts may still be present due to potential cross-contamination. If you have severe gluten sensitivities, exploring alternative gluten-free or gluten-reduced beer options may be a safer choice. Remember to always consult with healthcare professionals to address any concerns related to dietary restrictions and gluten consumption.