Your "light" yogurt can pack more sugar than a donut
"Low fat" almost never means "low sugar." Very often it means the exact opposite.
The short version
- Removing fat tends to ruin flavor, so the industry compensates by adding sugar.
- A flavored "light" yogurt can carry 20 g of sugar or more per cup — close to a full day's recommended limit.
- WHO advises keeping free sugars under 10% of your calories, and ideally under 5%.
The trick almost nobody notices
The word "light" on a package makes you feel like you're choosing well. But "light" or "low fat" is a claim about fat — not about sugar. And that's where it gets you.
Fat carries much of a food's flavor and texture. Strip it out and the product tastes flat. The industry's cheapest fix? Add sugar (or syrups) so it tastes good again. That's why many "light" products end up with more sugar than the regular version.
The yogurt example
Plain unsweetened yogurt has only the sugar naturally found in milk (lactose). But a "light" strawberry or vanilla yogurt can carry 15 to 24 grams of sugar per single cup.
For scale: the World Health Organization recommends keeping free sugars under 10% of your daily energy — about 50 g (12 teaspoons) on a 2,000-calorie diet — and ideally under 5% (about 25 g). A single flavored yogurt can eat half of that budget before the rest of your day even starts.
How to read the label in 10 seconds
Ignore the front of the package and go straight to the nutrition table. Find the "Sugars" (or "Added sugars") line and check it per serving and per 100 g.
Quick rule: 4 grams of sugar = 1 teaspoon. So a product with 20 g of sugar has 5 teaspoons inside. Also scan the ingredient list: if sugar, corn syrup, dextrose, maltose or fruit concentrate show up near the top, it's a sugary product no matter what "light" says.
What to do instead
This isn't about fearing packaged food — it's about reading it. Choose plain, unsweetened yogurt and sweeten it yourself with fresh fruit: you control the amount and add fiber. And whenever you're unsure how much sugar or how many calories something holds, scan it with CalorIA Scan and compare before you decide.
Stop guessing your calories
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Get CalorIA Scan freeSources
- WHO — Healthy diet (free sugars recommendation <10% / <5%)
- WHO — Guideline: Sugars intake for adults and children (2015)
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This article is informational and not medical advice. Consult a doctor or registered dietitian before changing your diet, especially with a pre-existing condition.