KFC · Fountain Drinks & Kids Drinks · United States
Mountain Dew Sweet Lightning Calories & Nutrition
One serving (20 fl oz) of Mountain Dew Sweet Lightning from KFC has 120 calories, 0g protein, 32g carbs, 0g fat and 25g sugar.
Sweet Lightning blends the southern flavors of sweet peach and smooth honey to create a refreshing taste that wonderfully complements our crispy fried chicken. Only available at KFC.
Key facts
Calories
120 kcal
Protein
0g
Carbohydrates
32g
Sodium
190 mg
It ranks #11 of 28 fountain drinks & kids drinks from lowest to highest calories, with 21% fewer calories than the category average of 152 kcal.
Add to the KFC calculatorIngredients & allergens
Allergens:
No major allergens listed.
Ingredients
Carbonated Water, High Fructose Corn Syrup, Citric Acid, Natural and Artificial Flavor, Sodium Benzoate (Preserves Freshness), Caffeine, Sodium Citrate, Yellow 5, Acesulfame Potassium, Gum Arabic, Sucralose, Calcium Disodium EDTA (To Protect Flavor), Yellow 6, Sucralose Acetate Isobutyrate.
Allergens shown in capitals as declared by KFC. Recipes change and items are made on shared equipment, so always check in store if you have an allergy.
Lower-calorie alternatives
Mountain Dew Sweet Lightning: common questions
How many calories are in a Mountain Dew Sweet Lightning?
One serving (20 fl oz) of Mountain Dew Sweet Lightning from KFC has 120 calories, 0g protein, 32g carbs, 0g fat and 25g sugar. That is 6% of the 2,000 kcal daily value for an average adult.
How much sugar is in Mountain Dew Sweet Lightning?
25g of total sugars, of which 0g are added sugars.
Is Mountain Dew Sweet Lightning dairy-free?
The official allergen information lists no milk in the standard build. KFC uses shared equipment, so traces are possible.
Source: KFC Full Nutrition Guide (official table on kfc.com/full-nutrition-guide, hosted by Nutritionix) (last updated 2026-10-02, retrieved 2026-10-16); KFC item nutrition labels: ingredients & allergens (same official tool) (retrieved 2026-10-16); KFC Nutrition Calculator (kfc.com/nutrition): Sweet Tea and Unsweet Tea (dataset 6826-0-1788988553, retrieved 2026-10-16); KFC Food Allergies & Sensitivities (retrieved 2026-10-16); kfc.com menu (product descriptions, combo contents and default picks) (retrieved 2026-10-16). Data checked 2026-10-16. KFC is a trademark of its owner; Fast Food Calc is independent and not affiliated with KFC.