Beetroot juice is not low FODMAP. Beetroot contains fructans, a type of fermentable oligosaccharide that can trigger digestive symptoms in people with IBS or FODMAP sensitivity. This applies to whole beets, canned beets, pickled beets, and beetroot juice alike.
Why Beetroot Is High FODMAP
Beets are naturally rich in fructans, which are chains of fructose molecules that your small intestine can’t fully break down. Instead, they travel to the large intestine where gut bacteria ferment them, producing gas. For most people this is harmless, but if you have IBS or a sensitive gut, that fermentation can cause bloating, cramping, and diarrhea.
Juicing makes the problem worse, not better. When you juice beetroot, you remove the fiber but concentrate the fructans into a liquid your body absorbs quickly. A single glass of beetroot juice can contain the equivalent fructan load of several whole beets, meaning you’re getting a larger dose in a form that hits your gut faster. This is the opposite of what the elimination phase of a low FODMAP diet calls for.
What About Small Amounts?
Some high FODMAP foods become tolerable at very small servings. With beetroot, however, even modest portions contain enough fructans to be problematic for many people during the elimination phase. There is no widely recognized “safe” serving size for beetroot juice specifically during elimination. If you’re in the reintroduction phase and want to test your personal tolerance, start with a tablespoon or two of juice and monitor your symptoms over 24 to 48 hours.
Concentrated Beetroot Shots and Athletes
Beetroot juice shots, popular among endurance athletes for their nitrate content, are even more concentrated than regular beetroot juice. A typical 70ml shot packs the fructans from a much larger volume of beets into a tiny serving. If you’re following a low FODMAP protocol and use beetroot shots for exercise performance, these are likely to cause symptoms. The high concentration makes them one of the riskier forms of beetroot for a sensitive gut.
Low FODMAP Juice Alternatives
If you enjoy vegetable juices, several FODMAP-friendly options can fill the gap. Carrot, spinach, and cucumber all have low FODMAP ratings and juice well. A homemade carrot-orange juice, for example, provides similar vitamins A and B without the fructan load. Stick to 125ml servings of fruit-based juices and use only fruits confirmed as low FODMAP at your chosen portion size.
For the nitrate boost that draws athletes to beetroot, spinach and arugula are decent alternatives. They contain dietary nitrates in smaller amounts, but they won’t cause the same FODMAP-related symptoms.
Red Pee and Poop From Beets
One thing worth separating from FODMAP symptoms: beetroot contains a pigment called betanin that can turn your urine and stool red. This is called beeturia, and it’s completely harmless. It happens because some people don’t fully break down the pigment during digestion. You’re more likely to notice it if you have a condition that affects nutrient absorption, like IBS, IBD, or celiac disease.
Beeturia is not an allergic reaction and doesn’t signal any health problem on its own. If your stomach acid is on the lower side, more of the pigment passes through undigested and ends up coloring your stool a reddish amber. It can look alarming, but it’s a quirk of beet digestion, not a symptom you need to worry about. The digestive discomfort some people feel after drinking beetroot juice is a separate issue, driven by the fructan content rather than the pigment.