Starry and Sprite are nutritionally almost identical. Both use the same sweetener (high fructose corn syrup), the same acidulant (citric acid), and neither contains caffeine. The differences between them come down to a handful of minor additives, none of which meaningfully shift one soda into “healthier” territory.
How the Ingredients Compare
The ingredient lists for both sodas start the same way: carbonated water, high fructose corn syrup, citric acid, and natural flavors. That shared foundation means the calorie count, sugar load, and basic acidity are virtually the same. A 12-ounce can of either delivers around 38 to 40 grams of added sugar, which is close to the entire daily limit recommended by the American Heart Association (36 grams for men, 25 grams for women).
Where the two diverge is in the supporting cast of preservatives and buffering salts. Sprite uses sodium-based additives: sodium citrate and sodium benzoate. Starry uses potassium-based versions of those same ingredients (potassium citrate and potassium benzoate) and adds one extra compound, calcium disodium EDTA, which acts as a preservative that helps maintain color and flavor stability.
Sodium vs. Potassium Salts
This is the one real compositional difference worth understanding. Sprite’s sodium citrate and sodium benzoate contribute a small amount of dietary sodium. Starry’s potassium citrate and potassium benzoate contribute potassium instead. The amounts involved in a single can are small enough that they won’t significantly affect your daily intake of either mineral, but if you’re closely monitoring sodium for blood pressure reasons, Starry does technically add less sodium per serving.
That said, a lemon-lime soda is not a meaningful source of either sodium or potassium in your diet. The difference matters far less than, say, the sodium in a bag of chips or a bowl of soup. Calling Starry “healthier” on this basis would be a stretch.
The Extra Preservative in Starry
Starry contains calcium disodium EDTA, a chelating agent that Sprite does not include. This compound binds to trace metals in the liquid that could otherwise cause off-flavors or discoloration. The FDA considers it safe for use in food at regulated levels, and it appears in many canned and bottled beverages. It’s not a health concern at the concentrations found in soft drinks, but it does mean Starry has a slightly longer ingredient list. For people who prefer fewer additives on principle, Sprite has the simpler formula.
Sugar and Calorie Content
Both sodas use high fructose corn syrup as their sole sweetener. Neither uses cane sugar in standard U.S. formulations. This means the type of sugar, not just the amount, is the same. Your body processes both drinks in essentially the same way: a rapid spike in blood sugar followed by an insulin response. Over time, regular consumption of either one carries the same risks for weight gain, type 2 diabetes, and metabolic issues.
Both brands also offer zero-sugar versions sweetened with artificial or non-nutritive sweeteners. If your primary concern is sugar intake, the zero-sugar line of either brand eliminates that issue, though the acid content remains.
Acidity and Tooth Enamel
Citric acid gives both sodas their tart lemon-lime bite, and it’s also what makes them erosive to tooth enamel. Sprite has a measured pH of about 3.24, which is quite acidic (for reference, water is 7.0 and battery acid is around 1.0). Starry has not been independently tested in published research because it launched in 2023, but given that it uses the same acid and a similar formulation, its pH is likely in the same range. Neither soda is gentle on your teeth, and drinking either one regularly, especially sipping over long periods, increases the risk of enamel erosion.
Caffeine
Neither Starry nor Sprite contains caffeine. This puts them on equal footing if you’re avoiding stimulants, and it’s one reason both are commonly offered to children or recommended as stomach-settling drinks (though the sugar and acid content makes that a debatable choice).
The Bottom Line on “Healthier”
Choosing between Starry and Sprite on health grounds is like choosing between two nearly identical candy bars with different wrappers. The sugar content is the same, the acidity is comparable, and neither provides any nutritional benefit. The potassium-based salts in Starry offer a negligible advantage over Sprite’s sodium-based salts, but it’s not a difference that would show up in any meaningful health outcome. If you’re deciding between the two, taste preference is a more honest reason than health. If you’re trying to make a healthier choice overall, the bigger win is swapping either one for water or an unsweetened sparkling water.