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Is Guinness Gluten-Free? Health Alert You Need

By: Aman Babal
Updated On: February 14, 2024

There's nothing like the dramatic surge of the dark and creamy Guinness beer cascading into a pint glass. It is a sight to behold and taste! Still, if you've recently started a gluten-free diet, you may find yourself asking a critical question before your next cheers - "Is Guinness gluten-free?" The answer to this query isn't as black and white as the beloved stout in your pint glass. Understanding whether Guinness is safe for your diet requires a deep dive into its brewing practices, ingredients, and the somewhat gray area that beer occupies in the world of gluten-free labeling. So, let's lift the frothy curtain and explore this topic further.

Also Read: Is Twisted Tea Gluten-Free?

Is Guinness Gluten-Free?

Is Guinness Gluten Free 2

No, Guinness is not gluten-free. Guinness, everyone's favorite Irish dry stout, does contain gluten. It owes its rich flavor to barley, which is a known source of gluten. In fact, most beers traditionally aren't gluten-free due to their sheer reliance on glutenous grains like barley, wheat, and rye during the brewing process.

What Are The Key Ingredients in Guinness?

In general, Guinness comprises four primary ingredients:

  1. Water – sourced from the famous Wicklow mountains in Ireland.
  2. Barley – mostly malted, but with a small portion of roasted unmalted barley that gives Guinness its distinctive dark color and taste.
  3. Hops – combine bitterness with a variety of aromatic flavours.
  4. Yeast – helps to ferment the sugars into alcohol.

Now, the concern for gluten-sensitive individuals arises with barley. Barley naturally contains hordein, a type of gluten protein that presents problems for those with gluten intolerance, coeliac disease, or wheat allergy.

Guinness' Brewing Process and Gluten

The brewing process for Guinness, or any beer for that matter, involves extracting the sugars from grains, so that yeast can turn it into alcohol and carbon dioxide, creating beer. The proteins from the grains, including hordein, carry into the final product which, thereby, introduces gluten to the mix.

Is there a chance for the gluten to be removed during the brewing process?

This is a common query, and while some brewing processes can reduce the amount of gluten in the beer, Guinness doesn’t claim to do so. While they do undergo a filtration process, it isn’t designed to remove gluten, and no third-party testers have conclusively proven the gluten content to be low enough to be deemed safe for those with sensitivities or allergies. The bottom line here - drinking Guinness runs the risk of gluten contamination.

Have a look at the below table to understand better:

IngredientsDoes it contain Gluten?

We can conclusively say that the brewing process does involve glutenous grains, and as such, Guinness carries gluten into its final product. So, for those who are gluten-sensitive or diagnosed with coeliac disease, it would be best to skip the pint.

The Brewing Process of Guinness

Every wizard-like concoction begins with a recipe, and in the case of Guinness, the key components are barley, hops, yeast, and water. Understanding how these straightforward ingredients merge to form the iconic Guinness requires a glimpse into the brewing process.

Initially, barley is malted, which means it's soaked in water until it germinates, then dried in a kiln. The resultant malted barley is rich in enzymes needed for the brewing magic to happen. Here's where the gluten factor kicks in - barley is a gluten-rich grain.

During brewing, the malted barley is mashed and added to hot water to extract its sugar — aiding the yeast in the fermentation process. The concoction, known as wort, gets boiled and flavoured with hops, after which yeast is introduced. The yeast ignites fermentation, consuming the sugar and producing alcohol, carbon dioxide, and heat.

Finally, the liquid is rested, filtered and packaged as the Guinness beer we know. During this process, some gluten proteins remain, putting Guinness in the spotlight of our gluten question.

Understanding Low Gluten vs Gluten-Free

Understanding Low Gluten vs Gluten-Free

For legal and safety reasons, the U.S. Food and Drug Administration (FDA) and the European Union have strict regulations in place for labeling foods as "gluten-free". Essentially, these foods must contain less than 20 parts per million (ppm) of gluten. This is the lowest level that can be consistently detected in foods using scientific analytical tools. Other regions in the world follow similar measures.

This bears the question, where does Guinness stand?

Guinness stout-style beer contains less than 20 ppm, but it is not labeled as gluten-free, why? The reason lies in the methods of testing. Current methods can effectively quantify gluten in foods where it's present as intact proteins. Things get complex for beers like Guinness that use barley as a starting point. Why? Because barley's gluten proteins get broken down during the brewing process into smaller pieces called peptides. While these could be harmless, some may still trigger a reaction in people with celiac disease or gluten-sensitivity.

Ironically, these broken proteins, or peptides, are challenging to measure accurately, leading to products like beer being classified as "low gluten" instead of "gluten-free". The difference can seem negligible, but for anyone with a severe gluten intolerance, this difference is huge. Hence, Guinness fits the "low gluten" category rather than "gluten-free". Bottom line? If you're strictly gluten-free, the safest route is sticking with products labeled specifically as such. Better safe than sorry, always.

Alternatives for Gluten-Sensitive Beer Lovers

If you're a beer lover navigating the tricky landscape of a gluten-free diet, do not fear. There are plenty of options on the market designed specifically for people with gluten intolerance. While it may initially be difficult to bid farewell to classic staples like Guinness, there's a universe of taste to be discovered in gluten-free beers.

For example, Glutenberg Blonde is an entirely gluten-free beer that has been gathering rave reviews for its refreshing taste. It is made from 100% gluten-free grains, ensuring it's safe for those needing to avoid gluten. You can check it out on their official website.

Next on the list is Omission. This great beer has an interesting story, as it's made from barley, a gluten-containing grain, but uses a process to remove the gluten to levels under 20 ppm (parts per million). They offer a few different types such as lagers and IPAs.

You might also want to try out the Green’s offerings. Imported from Belgium, they offer a variety of gluten-free beers made from alternative grains. From their website, you can find different styles including amber, blonde, and tripel.

Lastly, the Estrella Damm Daura ( has perfected the process of removing gluten from barley and boasts a delightful lager that is undeniably crisp.

Just remember, while these beers are technically gluten-free, individuals with extreme sensitivity may still want to test these out cautiously.

Also Read: Best Lager Beer Brands

Frequently Asked Questions

What ingredients are used in brewing Guinness?

Guinness is typically brewed using a mixture of barley, hops, yeast, and water. Because barley naturally contains gluten, the beer potentially contains gluten as well.

Is Guinness certified as a gluten-free product?

No. Guinness does not have a gluten-free certification. Therefore, it should not be considered a gluten-free product.

Can I drink Guinness if I am gluten intolerant or have Celiac disease?

If you are gluten intolerant or have Celiac disease, you should probably avoid drinking Guinness due to its potential to contain gluten. However, please consult your doctor or a registered dietitian for advice tailored to your specific situation.

Is Guinness draught or bottled Guinness gluten-free?

Neither the draught nor bottled Guinness are certified as gluten-free.

Are there any gluten-removed beers available?

Yes, there are breweries that offer "gluten-removed" beers, which are originally made with grains that contain gluten, and then a process is implemented to remove the gluten. But take note, these may still pose a risk to consumers with Celiac disease.

Is there a test for gluten in beer?

Yes, there are commercial tests available that can determine the gluten content in beer, but these might not always be accurate due to the complexities in testing fermented products.


Through the exploration we've embarked on, it's clear that the question "Is Guinness gluten-free?" has shades of complexity. If you fashion yourself an occasional Guinness drinker and don't have severe reactions to gluten, there's reason to believe that you could dabble in a pint or two without worry. But for those with celiac disease or high sensitivity to gluten, it might be wiser to steer clear and choose decisively gluten-free alternatives. The stout's exact gluten content sits in a gray area and it would be a gamble to say the least.

Always remember to prioritize your health and consult a healthcare professional if uncertain. The world of beer is vast and diverse so do not worry - your perfect frothy counterpart is out there! Keep exploring, keep tasting, and let's raise a toast to your beautiful journey in the kingdom of beers!

Beverage Explorer and Tastemaker ???????????? Aman's quest for liquid delights knows no limits. From hoppy brews to aged spirits, he uncovers the tales behind each sip. His eloquent descriptions and accessible insights make every drink an adventure worth raising a glass to.
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