Horchata is unlikely to send you running to the bathroom on its own, but certain ingredients in it can affect your digestion depending on the type you drink, how much you have, and your individual sensitivities. The answer depends largely on whether you’re drinking Mexican-style horchata (rice-based) or Spanish-style horchata (made from tiger nuts), because their effects on your gut are surprisingly different.
Rice-Based Horchata May Slow Things Down
Mexican horchata, or horchata de arroz, is made from soaked rice, water, cinnamon, vanilla, and often evaporated or condensed milk. The rice component is actually more likely to firm up your stool than loosen it. Rice water has been used for decades to manage mild diarrhea because it decreases stool output. Rice-based solutions promote greater absorption of fluid and electrolytes in the gut, meaning your intestines pull more water back in rather than letting it pass through. So if anything, the rice base in Mexican horchata works against a laxative effect.
That said, the cinnamon in horchata isn’t doing much either way. While cinnamon has a reputation as a digestive aid, research shows that typical amounts (around 3 grams) don’t significantly change how fast food moves through your stomach or intestines. The small pinch of cinnamon in a glass of horchata is well below even the doses tested in studies.
Tiger Nut Horchata Is a Different Story
Spanish-style horchata de chufa, made from tiger nuts, packs a serious amount of fiber. A quarter-cup serving of tiger nuts contains roughly 10 grams of fiber, mostly the insoluble kind that passes through your system undigested. This type of fiber bulks up your stool and helps prevent constipation, so drinking tiger nut horchata regularly could genuinely make your bowel movements more frequent or easier to pass.
Tiger nuts also contain resistant starch, a type of carbohydrate that acts as a prebiotic. It feeds the beneficial bacteria in your gut, which can change your digestive patterns. In one study of 35 healthy adults who drank tiger nut horchata, 4 participants actually dropped out because they experienced intestinal discomfort and diarrhea. The remaining 31 people reported no changes in their bowel habits. So tiger nut horchata clearly does affect some people’s digestion, though most tolerate it fine.
The fibrous nature of tiger nuts can also cause bloating and gas, especially if you have a sensitive stomach or an existing digestive condition. If you’re not used to high-fiber foods, introducing tiger nut horchata too quickly could easily lead to loose stools.
Dairy and Lactose Sensitivity
Many Mexican horchata recipes call for evaporated milk or sweetened condensed milk to give it that signature creamy texture. If you’re lactose intolerant, this is the most likely reason horchata would make you poop. Undigested lactose draws water into your intestines and gets fermented by gut bacteria, producing gas, cramping, and diarrhea. About 68% of the global population has some degree of reduced lactose digestion, so this is hardly a rare scenario.
Homemade recipes vary widely. Some use no dairy at all, relying on the starchy rice water for creaminess. Others load up on condensed milk. If you’ve noticed horchata bothers your stomach, checking whether the version you drank contained dairy is the first thing worth investigating.
Sugar Content Matters More Than You’d Think
Horchata is a sweet drink. Traditional recipes use generous amounts of sugar, and commercial versions sometimes contain even more than homemade batches. While regular sugar (sucrose) has a high tolerance threshold before it triggers osmotic diarrhea (you’d need to consume 70 to 100 grams of fructose in a single dose to hit that point), drinking a large, very sweet horchata on an empty stomach can still upset a sensitive digestive system. The combination of sugar and cold liquid can stimulate gut contractions in some people, especially if you drink a lot at once.
Watch for Additives in Store-Bought Versions
Bottled or pre-made horchata from the grocery store often contains stabilizers and thickeners to keep the ingredients from separating. Common ones include gellan gum, guar gum, xanthan gum, and carrageenan. Of these, carrageenan and xanthan gum are the most likely to cause digestive sensitivity. Some people report bloating, cramping, or looser stools after consuming products with these additives, though tolerance varies widely from person to person.
If store-bought horchata consistently bothers your stomach but homemade versions don’t, the stabilizers are a likely culprit. Check the ingredient label for carrageenan in particular, as it has drawn the most scrutiny for gastrointestinal effects.
Why It Hits Some People Harder
The reason horchata affects people differently comes down to a few overlapping factors. Your lactose tolerance, your baseline fiber intake, how much you drink, and whether you’re consuming it on an empty stomach all play a role. Someone who is mildly lactose intolerant, drinks a large dairy-heavy horchata with a high sugar load, and hasn’t eaten much that day is setting up the perfect conditions for a bathroom trip. Meanwhile, someone drinking a small, dairy-free, rice-based horchata will likely notice no digestive effect at all.
If you love horchata but find it upsets your stomach, try a dairy-free version first. If that doesn’t help and you’re drinking the tiger nut variety, scale back your portion size to let your gut adjust to the fiber. For most people, a normal serving of horchata won’t cause any noticeable change in bowel habits.