The Surprisingly Painful Side Effects of Quinoa—And How To Avoid Them

January 6, 2016
by Annalise Mantz for Thrive Market
The Surprisingly Painful Side Effects of Quinoa—And How To Avoid Them

Gluten, nuts, fish, dairy, eggs, soy—name almost any food, and you're almost guaranteed to find someone who has developed an allergy to it.

Even superfoods. Take quinoa, for example: Though this psuedocereal has skyrocketed to superfood status in recent years, a small subset of people report intense stomach pain after eating quinoa.

To understand why quinoa might cause some problems, you first have to understand what it is. Quinoa is actually a seed, albeit a gluten-free one with an incredible nutritional content. Because of its very mild flavor, quinoa is easy to incorporate into almost any dish—from breakfast porridge to a classic Korean bowl.

But it can lead to some serious stomach problems. Just google "quinoa stomachache" and you'll find tons of complaints—from intolerable stomach pain to severe indigestion to much more nasty issues. (Some that this writer can unfortunately attest to from personal experience.)

One possible reason behind this digestive distress? Quinoa has nearly double the fiber of most grains. If your body isn't used to consuming a ton of fiber, and suddenly you double down on a quinoa salad, it could definitely throw you for a loop ... and lead to diarrhea, bloating, and discomfort.

And then there's the issue of saponin, a soapy, naturally occurring chemical that coats quinoa grains. In nature, saponins discourage birds from eating the seeds, as they're bitter and slightly toxic. Though little research has been done on the topic, some people speculate that these compounds could cause stomachaches and digestive troubles in especially sensitive people. Some even suggest that saponins could puncture tiny holes in your digestive tract.

That's why many cooks recommend washing your quinoa thoroughly before cooking it. Beyond upsetting your stomach, saponins also taste really bad—some describe their flavor as bitter, and even soapy. Before preparing quinoa, rinse it thoroughly in a fine mesh sieve to remove saponins. Some quinoa manufacturers have begun pre-washing the seeds, but to be on the safe side, give it a rinse anyway.

If that doesn't do the trick, you might want to pass on the quinoa all together. Since not much research has been done on the topic, there's no foolproof way to prevent reactions to quinoa. Just listen to your body—any food it doesn't tolerate, nutrient-dense superfoods included, probably isn't worth it.

Photo credit: Paul Delmont


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This article is related to: Cooking, Diet, Gluten-Free, Nutrition, Educational, Quinoa Recipes

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  • Lynn

    Thank you for posting this! This doesn't happen to me with all kinds of quinoa (that I've noticed, anyway), but rather only with black quinoa. I absolutely love the taste of it, but my stomach cannot digest it, even after washing, it seems. I have all sorts of not-fun side effects after I eat it. :( I'm glad to know I'm not alone!

  • https://www.facebook.com/BiomeOnboardAwareness BiomeOnboardAwareness

    Proper preparation of quinoa involves an EASY overnight acid soak (apple cider vinegar works). Quinoa contains saponins, phytic acid, tannins and protease inhibitors. Proper soak removes all bitterness and increases digestibility. Hard to believe one would skip this step... look at the foam that is removed on the below slide. See the recipe, and PubMed links at http://biomeonboardawareness.com/how-why-properly-prepare-soak-quinoa/ Surprisingly, PubMed studies looking at quinoa consumption for celiacs only published in 2014 finding no damage consuming 50 gms daily short term, 6 weeks. Long term studies were recommended.

  • My Account

    I ate quinoa for 20 years without any problems whatsoever, then one day not too long ago, bam! Intense pain for days, digestive upset for much longer than that. I read that once you have a bad reaction to quinoa, it's best to set it aside, as reactions get increasingly worse. I accidentally ate some sprouted quinoa...just a touch...and I was sick for two days. I miss it, but SO not worth the pain.

  • Gaby Zabalua

    Does anyone know if there is a quick remedy to prevent the painful side effects if one ingests quinoa accidentally. I realized I was eating quinoa half way into my salad a mere half hour ago. I am still feeling OK, but having been severely sick from quinoa before, I am hoping someone can offer a quick antidote...Just in case, I had a glass of milk. Help?