Could Your Allergy Symptoms Be Linked to a Stevia Sensitivity?

Have you recently made the switch to a low-sugar or sugar-free diet in an effort to live a bit healthier, only to find yourself suddenly battling unexplained allergy symptoms? 

Sneezing, rashes, itching, or even digestive discomfort can be confusing, especially if you’re eating “cleaner” than ever. One unexpected culprit might just be stevia.

What Is Stevia?

Stevia is a natural sweetener extracted from the Stevia rebaudiana plant. It's become a popular choice for people looking to reduce sugar intake without using artificial sweeteners. You’ll often find it in:

Sugar-free fizzy drinks

Keto-friendly baked goods

Protein powders and health bars

Flavoured waters

“Natural” sweeteners for coffee or tea

On labels, it might appear as:

Steviol glycosides

Rebaudioside A (Reb A)

Stevia leaf extract

E960 (the EU additive code)

Is It Possible to Be Allergic to Stevia?

While true stevia allergies are rare, they can happen. Stevia belongs to the Asteraceae plant family — the same group as ragweed, daisies, chrysanthemums, and marigolds. If you’re allergic to any of those, your body may react similarly to stevia.

Possible Signs of a Stevia Sensitivity or Allergy:

Skin rashes or hives

Itchy mouth or throat

Sneezing or nasal congestion

Upset stomach or diarrhoea

Facial swelling (especially lips or eyes)

In extremely rare cases, anaphylaxis

What Should You Do?

If you suspect stevia might be behind your recent symptoms:

Read ingredient labels carefully — even health products may contain stevia in some form.

Eliminate all products containing stevia for at least a week or two and monitor symptoms.

Keep a food diary to track what you eat and how you feel.

Speak to your GP or an allergist — you may be offered skin prick testing or other diagnostic options.

Alternatives to Consider

If you discover stevia is a trigger for you, don’t worry, there are other low-sugar or sugar-free options:

Monk fruit extract (often blended with erythritol)

Xylitol or erythritol (sugar alcohols — though note they can cause digestive upset for some)

Raw honey or maple syrup (not sugar-free, but less processed)

Final Thoughts

Switching to a low-sugar lifestyle is a great health goal, but not every ingredient will work for every body. If your body starts sending strange signals, listen to it — and don’t rule out even the most “natural” ingredients as a potential cause.

Have you experienced symptoms after switching to sugar-free or stevia-sweetened products? Share your story in the comments, you’re not alone, and your experience might help someone else figure it out too.

Update:- The reason we researched and wrote this blogpost is that my wife realised that she has an allergy to stevia and wondered if this type of allergy was impacting other people. It transpires that it is.