Lemon-lime soda is gluten-free — 7UP, Sprite, Starry, and Sierra Mist are all GF.
Yes. Lemon-lime soda (7UP, Sprite, Starry, Sierra Mist, store brands) is carbonated water, sweetener, citric acid, and citrus natural flavors — no gluten-containing grains. Soda makers follow FDA top-9 allergen labeling and would declare wheat if present. Diet/Zero versions use aspartame/acesulfame potassium, both gluten-free. Fountain lemon-lime is the same formula as bottled — one of the most reliable safe GF fountain choices.
Lemon-lime soda is a reliably gluten-free pick — whether it’s 7UP, Sprite, Starry, or a store brand, it’s carbonated water, sweetener, citric acid, and citrus flavors with no grain. It’s also one of the safest gluten-free choices at a restaurant fountain.
What’s in Lemon-Lime Soda
Per 7UP’s product information: 7UP is carbonated water, high fructose corn syrup, citric acid, natural flavors, potassium benzoate (preservative), potassium citrate, and calcium disodium EDTA. Sprite, Starry, and Sierra Mist have similar profiles. Per FDA labeling rules, none of these is a gluten-containing grain — the natural flavors are citrus-derived (lemon/lime), not grain.
Cross-Contamination Risk
Manufacturing
Low
- Beverage facilities don’t process wheat.
- FDA top-9 allergen labeling — wheat declared if present.
- Clear soda; no caramel color.
Restaurant / Bar
Low
- Sealed cans/bottles; standard service is safe.
- Fountain lemon-lime is the same syrup as bottled — GF.
- As a cocktail mixer: GF base; verify the alcohol.
Home
Low
- Sealed can or bottle, standard storage.
Lemon-Lime Soda Brands — All GF
- 7UP (Keurig Dr Pepper) — gluten-free
- Sprite (Coca-Cola) — gluten-free
- Starry (PepsiCo, replaced Sierra Mist) — gluten-free
- Sierra Mist (discontinued/replaced by Starry) — was gluten-free
- Store-brand lemon-lime soda — gluten-free (verify label)
- Diet/Zero lemon-lime (Diet 7UP, Sprite Zero, Starry Zero Sugar) — gluten-free (aspartame/ace-K)
- “Hard”/alcoholic lemon-lime — verify the alcohol; beer-based shandy is NOT GF
What to Look For — Or Avoid
- 7UP, Sprite, Starry, store-brand lemon-lime — all GF
- Carbonated water, sweetener, citric acid, citrus flavors
- No “Contains: Wheat” allergen callout on the can/bottle
- Fountain lemon-lime — same formula as bottled, GF
- No formal “Gluten Free” label (soda makers use top-9 allergen labeling)
- Lemon-lime in cocktails — verify the alcohol (beer-based shandy not GF)
Frequently Asked Questions
Is lemon-lime soda gluten-free?
Yes. Lemon-lime soda (7UP, Sprite, Starry, Sierra Mist, store brands) is carbonated water, sweetener, citric acid, and citrus natural flavors — no gluten-containing grains. Soda makers follow FDA top-9 allergen labeling and would declare wheat if present.
Is 7UP gluten-free?
Yes. 7UP (carbonated water, high fructose corn syrup, citric acid, natural flavors, potassium benzoate, potassium citrate, calcium disodium EDTA) contains no gluten-containing grains. Diet 7UP and 7UP Zero Sugar are also gluten-free.
Is Starry or Sierra Mist gluten-free?
Yes. Starry (PepsiCo’s lemon-lime soda, which replaced Sierra Mist in 2023) is gluten-free, and Sierra Mist was gluten-free as well. Both are simple lemon-lime sodas with no gluten ingredients. Starry Zero Sugar is also gluten-free.
Is diet lemon-lime soda gluten-free?
Yes. Diet and Zero Sugar lemon-lime sodas (Diet 7UP, Sprite Zero, Starry Zero Sugar) use aspartame and/or acesulfame potassium instead of high fructose corn syrup. Both artificial sweeteners are gluten-free, and the rest of the formula is the same gluten-free lemon-lime base.
Is fountain lemon-lime soda gluten-free?
Yes. Fountain 7UP/Sprite/Starry uses the same syrup formulation as the bottled product — there’s no separate “fountain” recipe. The carbonated water comes from the venue’s filtered supply. Fountain lemon-lime soda is one of the most reliable safe gluten-free restaurant drink choices.
Is a lemon-lime soda cocktail gluten-free?
The lemon-lime soda is gluten-free. The variable is the alcohol added: most distilled spirits (vodka, gin, rum, tequila) are gluten-free per FDA/TTB labeling, but a beer-based shandy with lemon-lime soda would NOT be gluten-free. Verify the specific alcohol.