Olipop makes you poop because each can contains 9 grams of prebiotic fiber, mostly from ingredients your body can’t digest in the usual way. That fiber reaches your colon intact, where gut bacteria ferment it and produce byproducts that draw water into your intestines and stimulate muscle contractions that move things along. For context, dietary guidelines recommend about 14 grams of fiber per 1,000 calories you eat daily, and most Americans fall well short of that. Drinking a single can of Olipop can represent a sudden, significant jump in your fiber intake, and your gut notices.
What’s Actually in Olipop’s Fiber Blend
The fiber in Olipop comes from a proprietary mix called OLISMART, which combines four plant-based sources: chicory root inulin, cassava root fiber, Jerusalem artichoke, and nopal cactus. Each one contributes fiber in a slightly different way, but chicory root inulin is the headliner. It’s one of the most well-studied prebiotic fibers, and research consistently shows that daily doses between 4 and 15 grams increase stool frequency and add bulk to your stool. Jerusalem artichoke is also a natural source of inulin, so the two ingredients work in tandem.
Cassava root fiber operates a bit differently. It has a strong ability to absorb water in the digestive tract. In lab conditions, cassava fiber swells to over four times its dry volume when agitated, roughly mimicking what happens as food moves through your gut. That water absorption creates bulkier, softer stool, which physically stimulates the walls of your intestines and triggers more frequent bowel movements. Nopal cactus rounds out the blend as a fiber-rich ingredient used in traditional medicine, though its specific digestive effects are less studied than the others.
How Prebiotic Fiber Triggers a Bowel Movement
Your small intestine doesn’t have the enzymes needed to break down prebiotic fibers like inulin. So instead of being absorbed into your bloodstream like sugar or protein, these fibers pass through to your colon completely intact. Once there, your gut bacteria go to work fermenting them. That fermentation produces two things that matter here: short-chain fatty acids (which are beneficial for your colon lining) and gas.
The gas and the short-chain fatty acids both increase pressure inside the colon. At the same time, the fermentation process changes the osmotic balance in your gut, essentially pulling more water into the intestinal space. The combination of extra water, extra gas, and increased pressure stimulates peristalsis, the wave-like muscle contractions that push stool toward the exit. This is why the urge can feel sudden and strong, especially if your body isn’t used to that much fiber at once.
Chicory root inulin is a longer-chain fiber, meaning bacteria ferment it more slowly than shorter-chain fibers. That sounds like it would be gentler, but the opposite is often true. Because it ferments over a longer stretch of the colon, it tends to produce more pronounced digestive effects, including more gas and a stronger laxative-like response, compared to rapidly fermented short-chain fibers that get processed quickly in one spot.
Why It Hits Some People Harder
Not everyone who drinks Olipop rushes to the bathroom. How strongly you react depends on a few factors, the biggest being how much fiber you normally eat. If your baseline diet is low in fiber (which is common), your gut bacteria aren’t accustomed to fermenting large amounts of it. Introducing 9 grams in a single sitting, delivered in liquid form that moves through your stomach quickly, can overwhelm your system temporarily.
Your individual gut bacteria also play a role. Everyone’s microbiome is slightly different, and some people have bacterial populations that produce more gas during fermentation than others. People with sensitive digestive systems or conditions like irritable bowel syndrome are more likely to experience bloating, cramping, or urgency from prebiotic fibers at any dose.
Tolerance tends to improve with time. As your gut bacteria adapt to regular prebiotic intake, fermentation becomes more efficient and produces fewer side effects. This is why many people find that their first few cans of Olipop cause noticeable digestive effects, but the response mellows out after a week or two of consistent use.
How to Reduce the Digestive Effects
If you like Olipop but don’t love the bathroom trips, the simplest fix is to drink less of it at once. Half a can still delivers prebiotic benefits while cutting the fiber load your gut has to process in one sitting. You can also drink it with a meal rather than on an empty stomach. Food slows gastric emptying, which means the fiber reaches your colon more gradually instead of arriving all at once.
Building up your overall fiber intake from other sources (fruits, vegetables, whole grains, legumes) also helps over time. The more consistently your gut bacteria encounter fiber, the better they handle it. Think of it like training: a sudden 9-gram fiber spike is a bigger deal for a gut that rarely sees fiber than for one that processes 25 or 30 grams a day from a varied diet.
Carbonation can play a minor role too. The carbon dioxide in any carbonated drink can speed up gastric emptying and add to the bloated, gassy feeling that prebiotic fermentation already creates. Letting the drink go slightly flat before sipping, or drinking it slowly, can take the edge off.