Sprite hydrates you about as well as water in normal circumstances, but it comes with enough sugar and acid to make it a poor choice as a regular hydration source. A single 12-ounce can contains 38 grams of sugar, which is roughly 9.5 teaspoons. If you’re just thirsty, water does the same job without the downsides.
How Sprite Compares to Water for Hydration
Research published in The American Journal of Clinical Nutrition tested how well a range of beverages kept people hydrated over four hours by measuring urine output. Cola, diet cola, tea, coffee, orange juice, sparkling water, and sports drinks all performed about the same as plain water. Your body absorbs the fluid from a can of Sprite and retains it at roughly the same rate as water in everyday conditions.
This makes sense when you consider that Sprite is caffeine-free, so it doesn’t have the mild diuretic effect that coffee or caffeinated colas carry. The liquid itself gets absorbed. The problem isn’t that Sprite fails to hydrate. It’s everything else that comes along for the ride.
The Sugar Problem
Those 38 grams of sugar per can affect how your body handles water at the cellular level. High sugar intake causes cells to release more water and increases urination, which can work against hydration over time. One can probably won’t make a noticeable difference, but if you’re drinking multiple servings throughout the day to stay hydrated, the sugar load starts to undermine the goal.
There’s also a practical consideration: the American Heart Association recommends no more than 36 grams of added sugar per day for men and 25 grams for women. A single can of Sprite already exceeds both thresholds. Using it as your go-to hydration drink means consuming far more sugar than is healthy on a daily basis.
Carbonation Does Not Slow Hydration
You might wonder whether the bubbles in Sprite slow down fluid absorption. They don’t. A study published in the journal Nutrition found that carbonation temporarily expanded the stomach area during the first 20 minutes after drinking but had no meaningful effect on how quickly the liquid emptied from the stomach. Interestingly, higher carbonation actually reduced thirst more effectively than flat versions of the same drink, likely because the fizz creates a sensation of fullness. So the bubbles aren’t a barrier to hydration, though they might cause you to drink less overall.
Why Sprite Is Not Ideal During Illness
Many people reach for Sprite or ginger ale when they have a stomach bug, often based on advice passed down through families. Medical guidelines tell a different story. The CDC specifically recommends against using carbonated soft drinks for rehydration during vomiting or diarrhea, because the high sugar content can worsen symptoms by pulling more water into the intestines through osmosis, making diarrhea worse.
The real issue is electrolytes. When you’re losing fluids through vomiting or diarrhea, you need sodium and potassium to recover. The World Health Organisation recommends rehydration solutions contain 75 millimoles per liter of sodium. Carbonated drinks contain between 1 and 10 millimoles per liter of sodium and virtually no potassium. Sprite has 65 milligrams of sodium per can, which is a fraction of what your body needs during illness. Meanwhile, its glucose concentration is more than seven times higher than recommended for rehydration. Letting it go flat doesn’t fix these ratios.
If you’re dealing with stomach illness, oral rehydration solutions or even broth will do far more to restore what your body has lost.
Tooth Enamel Damage Over Time
Using Sprite regularly for hydration introduces another risk that water simply doesn’t carry. Sprite contains citric acid, which lowers the pH in your mouth and erodes tooth enamel over time. Unlike cavities, which a dentist can fill, enamel erosion is permanent. Once it happens, the underlying layer of the tooth becomes exposed, leading to sensitivity to hot and cold foods, drinks, and even cold air.
Researchers at the University of Nebraska Medical Center have noted increasing tooth sensitivity among young people who drink large quantities of soda. The damage is cumulative. Sipping Sprite throughout the day to stay hydrated means bathing your teeth in acid repeatedly, which accelerates erosion far more than drinking one can with a meal.
Better Options for Staying Hydrated
Plain water remains the simplest and most effective hydration choice for everyday use. If you find water boring, sparkling water hydrates identically to still water without the sugar or acid concerns of Sprite. Adding a squeeze of fresh lemon or lime gives you a similar flavor profile with a fraction of the citric acid exposure.
For exercise or moderate sweating, a sports drink or coconut water provides electrolytes that Sprite lacks. For illness-related dehydration, oral rehydration solutions are specifically designed with the right balance of sodium, potassium, and glucose to help your body absorb and retain fluid efficiently.
An occasional Sprite won’t dehydrate you. But choosing it as a regular hydration strategy means accepting a significant amount of sugar, acid exposure to your teeth, and none of the electrolytes your body actually needs when hydration matters most.