Nutritional Information for Popcorn
Popcorn spans a wide processing spectrum. Plain popping corn kernels are NOVA 1 and a whole grain with decent fibre, but nearly all pre-popped popcorn sold at Tesco is NOVA 4 (ultra-processed) due to added oils, sugar, salt, and emulsifiers like lecithins. Calorie content varies dramatically: air-popped plain kernels provide around 375 kcal/100g, while sweet pre-popped versions hit 492-506 kcal/100g with 20-23g of sugar. From a SpikeSaver perspective, popcorn has a medium glycaemic index (~55) and the pre-popped sweet varieties deliver a significant sugar load that will cause a noticeable glucose spike.
Nutrition per 100g
| Nutrient | Per 100g | Per serving |
|---|---|---|
| Energy | 492 kcal / 2059 kJ | 123 kcal |
| Protein | 6.4g | 1.6g |
| Carbohydrates | 60.3g | 15.1g |
| of which sugars | 20.7g | — |
| Fat | 23.4g | 5.9g |
| of which saturated | 1.8g | — |
| Fibre | 7.5g | — |
| Salt | 0.03g | — |
Serving size: 1 small bag (~25g) · Source: Tesco product page, October 2025
Glucose impact
Medium
Glucose risk
Popcorn has a medium glycaemic index of approximately 55. Plain air-popped popcorn with no added sugar has a moderate glucose impact from the corn starch. However, pre-popped sweet popcorn at Tesco contains 20-23g of sugar per 100g — a full 25g serving delivers about 5g of sugar plus additional starch. Sweet and salted varieties are the worst, combining 22.6g sugar with 58.5g total carbs per 100g. Salted popcorn without sugar (0.4g sugar/100g) is the better choice for blood sugar management.
Processing level
Plain unpopped corn kernels are NOVA 1 — a whole grain. However, virtually all pre-popped popcorn at Tesco is NOVA 4 (ultra-processed). Every product found contains emulsifiers (lecithins), and most also include added sugar, sunflower oil, and salt. Toffee popcorn adds glazing agents and butter. Even the 'salted' variety contains emulsifier lecithins. To eat NOVA 1 popcorn, you would need to buy plain kernels and air-pop them at home.
Popcorn at Tesco
Source: Tesco product page, October 2025
2 UPF markers
2 UPF markers
2 UPF markers
2 UPF markers
3 UPF markers
*Prices were correct at the time of collection and may have since changed. Check Tesco.com for current pricing.
What to watch for when shopping
Every single pre-popped popcorn product at Tesco is NOVA 4 due to emulsifiers (lecithins). The sugar content is the biggest variable: salted popcorn has just 0.4g sugar/100g, while sweet popcorn hits 20.7g and sweet & salted reaches 22.6g. Toffee popcorn (Butterkist) has 80g total carbs per 100g — mostly sugar. If you want the lowest glucose impact from pre-popped, choose salted only. For truly unprocessed popcorn, buy plain kernels and air-pop at home. Budget tip: Tesco Salted Popcorn 85G at £0.99 is the lowest sugar pre-popped option.
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