Is Sprite a Clear Liquid for Colonoscopy Prep?

Yes, Sprite is considered a clear liquid. It appears on approved clear liquid lists from major health systems, including the Mayo Clinic, SSM Health, and the U.S. Department of Veterans Affairs. If you’ve been told to follow a clear liquid diet before a medical procedure, Sprite is a safe choice.

Why Sprite Qualifies

A clear liquid diet includes any liquid that is transparent, easy to digest, and leaves no residue in your digestive tract. The key test is simple: can you see through it? Sprite is colorless and contains no pulp, fat, or solid particles. Its ingredients are carbonated water, high fructose corn syrup, citric acid, natural flavors, sodium citrate, and sodium benzoate. Nothing in that list would leave behind undigested material or interfere with imaging during a procedure like a colonoscopy.

Sprite is also caffeine-free, which can matter for certain pre-surgical instructions. Many doctors prefer patients avoid caffeine before anesthesia, so a caffeine-free soda is one less thing to worry about.

Regular Sprite vs. Sprite Zero

Both versions are clear liquids, but your doctor may have a preference. Sprite Zero Sugar replaces the corn syrup with aspartame, an artificial sweetener. Interestingly, some medical guidelines actually steer patients toward regular (sugar-containing) liquids rather than sugar-free ones. The VA’s clear liquid instructions, for example, specifically tell diabetic patients to drink regular liquids, not sugar-free versions. The sugar provides a small but steady energy source when you’re otherwise not eating solid food.

If you have diabetes or another condition that affects blood sugar, follow whatever your care team specifies. Otherwise, either version counts.

What Else Counts as a Clear Liquid

Sprite sits alongside a broader list of approved options. Clear liquids include:

  • Water (plain or flavored, as long as it’s transparent)
  • Broth (chicken, beef, or vegetable, strained)
  • Plain gelatin (like Jell-O, but not red or purple varieties)
  • Tea and coffee (no milk or cream)
  • Juices without pulp (apple juice, white grape juice)
  • Carbonated sodas (Sprite, 7-Up, ginger ale, cola)
  • Sports drinks (Gatorade, Powerade)
  • Popsicles (as long as they melt to a clear liquid)

A liquid can have some color and still qualify. Cola, for instance, is technically a clear liquid because you can see through it. The rule is transparency, not colorlessness.

What Doesn’t Count

Milk, cream-based soups, smoothies, and juices with pulp (like orange juice) are all excluded. They leave residue in the digestive tract, which defeats the purpose. Alcohol is also off the list for pre-procedure diets, even though many alcoholic drinks are transparent.

If your clear liquid diet is specifically for a colonoscopy, you’ll likely be told to avoid anything red, orange, or purple. These dyes can stain the lining of the colon and make it harder for the doctor to spot abnormalities. Sprite’s lack of coloring makes it a particularly safe pick for colonoscopy prep.

A Note on Carbonation

Some people wonder whether the bubbles in Sprite are a problem. Carbonation is generally fine on a clear liquid diet. However, if you’re drinking Sprite to help wash down a bowel prep solution (a common trick for masking the taste), the fizz can cause bloating or gas on an already sensitive stomach. Letting it go flat first, or taking small sips, can help. If your specific prep instructions say to avoid carbonation, stick with flat options like broth, tea, or apple juice instead.