Last updated September 24, 2026 · By the Foodmetria editorial team · how we work
How to play
- Each round shows two products. Tap the one you think has more sugar per 100 g (per 100 ml for drinks).
- After each answer you see both numbers. One sugar cube is about 4 g of sugar.
- Every pair links to the full side-by-side comparison: calories, fat, salt, protein, Nutri-Score and ingredients.
- Ten rounds, one set a day, the same for everyone. Keep your streak going — one missed day a week won’t break it — and send your score to a friend.
Why sugar is hard to guess
Packaging talks about protein, fibre, fruit and “natural” ingredients, and rarely about sugar. A fruit yogurt, a bowl of granola or a glass of juice can hold as much sugar per 100 g as something sold as a treat. The only reliable place to look is the nutrition table on the back.
The World Health Organization recommends keeping free sugars below 10% of daily energy and suggests that going below 5% — roughly 25 g, or six teaspoons, a day — has further benefits. In the US, the Daily Value for added sugars is 50 g.
This game isn’t about good and bad foods, and a higher number doesn’t mean you shouldn’t eat something. It’s about how different the label can be from what we expect.
Where the numbers come from
Product data comes from Open Food Facts, a collaborative database of food labels. Before a pair goes into the game we drop entries with obvious errors, such as more sugar than carbohydrates or more sugar than the calories allow. Recipes change and labels differ between countries, so the package in your hand is always the final word. How we work with the data.
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Questions
When does a new game start?
Every day at 00:00 UTC. Everyone in the world gets the same ten pairs that day, so you can compare scores with friends.
Is it total sugar or added sugar?
Total sugars, as printed in the nutrition table: the sugar naturally present in milk and fruit plus any sugar that was added. That is the number every label in the US and the EU has to show. Added sugar is listed separately only on US labels.
Why per 100 g and not per serving?
Serving sizes are chosen by the manufacturer and differ from brand to brand, so comparing per serving can make almost anything look light. Per 100 g — or per 100 ml for drinks — is the only fair way to compare two products.
Can I play an earlier game?
When a friend sends you their result link, it opens the set they played so you can see who did better. Earlier games do not count towards your streak.
Do you store my results?
Your score, answers and streak are saved only in this browser. There is no account. When you finish, we add your score and which pairs you got right to anonymous daily totals — that is how “better than 83% of players” works — with no name, IP address or cookie attached. To keep playing on another phone or browser, use “Continue on another device” after a game: it gives you a link that carries only your game stats. If you allow analytics cookies, we count anonymous game events such as starting, finishing and sharing in Google Analytics.
What happens to my streak if I miss a day?
One missed day a week won’t break it: play the next day and your streak carries on. Miss two days in a row, or twice within a week, and it starts again from one.