Sprite is not a good treatment for diarrhea. Despite its long reputation as a home remedy for stomach trouble, Sprite contains too much sugar, almost no electrolytes, and can actually make diarrhea worse. A 16-ounce serving has about 31 grams of sugar but only 3.5 milligrams of potassium and 31 milligrams of sodium, which is nowhere near what your body needs to recover from fluid loss.
Why Sprite Can Make Diarrhea Worse
The core problem is sugar. Harvard Health Publishing notes that sugars stimulate the gut to release water and electrolytes, which loosens bowel movements. Fructose is one of the biggest offenders, and people who consume more than 40 to 80 grams of fructose per day are likely to develop diarrhea. A couple of cans of Sprite could push you close to that threshold on sugar alone, on top of whatever else you’re eating or drinking.
There’s also the issue of osmolality, which is essentially how concentrated a liquid is. Your intestines absorb fluids best when they’re close to your body’s own concentration. Carbonated drinks like Sprite have an osmolality roughly three to seven times higher than oral rehydration solutions recommended by the World Health Organization. When you drink something that concentrated, your intestines pull water inward to dilute it, which means more liquid in your bowel and potentially more diarrhea.
What About Flat Sprite?
Letting Sprite go flat before drinking it is a popular piece of folk wisdom. The logic sounds reasonable: carbonation can cause bloating and discomfort, so removing the fizz should help. But a review published in the Archives of Disease in Childhood found that making soda flat doesn’t fix the real problem. The sodium and potassium levels remain far too low, and the sugar concentration stays far too high. The researchers concluded that carbonated drinks, flat or otherwise, “provide inadequate fluid and electrolyte replacement and cannot be recommended.”
What Your Body Actually Needs
When you have diarrhea, you lose water, sodium, and potassium. Replacing all three is what prevents dehydration. Oral rehydration solutions are specifically designed for this balance, with modest amounts of sugar (to help your intestines absorb sodium) and the right concentration of electrolytes. You can find these at any pharmacy.
If you don’t have a rehydration solution on hand, better options than Sprite include plain water, broth, diluted fruit juice (half water, half juice), popsicles, or weak decaffeinated tea. Take small sips rather than gulping large amounts, especially if you’re also dealing with nausea. Ice chips work well if even sips feel like too much.
What to Eat During a Bout of Diarrhea
You may have heard of the BRAT diet: bananas, rice, applesauce, and toast. It’s fine for a day or two, but current guidance from Harvard Health suggests a less restrictive approach. Brothy soups, oatmeal, boiled potatoes, crackers, and unsweetened dry cereals are all easy on the stomach and give your body more to work with nutritionally.
Once things start settling down, you can add cooked squash, carrots, sweet potatoes without skin, avocado, skinless chicken or turkey, fish, and eggs. The goal is to get back to a normal, nutritious diet fairly quickly rather than starving your gut for days on end. Foods to avoid while you’re recovering include anything with alcohol or caffeine, since both promote dehydration.
Signs of Dehydration to Watch For
Mild diarrhea usually resolves on its own within a day or two with proper fluid intake. But dehydration can sneak up on you, especially in young children and older adults. In adults, warning signs include extreme thirst, dark-colored urine, urinating less than usual, dizziness, confusion, and fatigue. A simple check: pinch the skin on the back of your hand. If it doesn’t flatten back right away, you may be significantly dehydrated.
In infants and young children, watch for fewer wet diapers than usual (or none for three hours), no tears when crying, a dry mouth, sunken eyes, rapid heart rate, or unusual crankiness. These signs mean the child needs medical attention, not home remedies.
For anyone, diarrhea lasting more than 24 hours, a fever of 102°F or higher, bloody or black stool, or an inability to keep fluids down warrants a call to a healthcare provider. At that point, the situation has moved beyond what water and bland food can fix.