Most adults should cap added sugar at 6 to 9 teaspoons per day, depending on sex. That translates to 25 grams for women and 36 grams for men, according to the American Heart Association. To put that in perspective, a single 12-ounce can of regular soda contains about 10 teaspoons of sugar, which already exceeds the full daily limit for women and surpasses it for men.
What the Major Guidelines Recommend
Several health organizations have issued sugar limits, and while the exact numbers differ slightly, they all point in the same direction: most people eat too much.
- American Heart Association: No more than 6 teaspoons (25 grams) per day for women, 9 teaspoons (36 grams) for men.
- World Health Organization: Less than 10% of total daily calories from free sugars, with a further suggestion to aim below 5%. On a 2,000-calorie diet, 10% works out to about 50 grams (12 teaspoons), and 5% is roughly 25 grams (6 teaspoons).
- U.S. Dietary Guidelines: Less than 10% of daily calories from added sugars, aligning with the WHO’s baseline recommendation.
The AHA’s limits are the strictest and the ones most commonly cited by doctors and dietitians in the U.S. If you want a simple number to remember, 25 grams is a solid daily ceiling for most people.
Limits for Children
Children under 2 should have no added sugar at all. That means avoiding sweetened yogurts, fruit juices with added sweeteners, and flavored snacks marketed to toddlers. For kids aged 2 and older, the American Academy of Pediatrics recommends staying under 25 grams (about 6 teaspoons) per day, the same limit set for adult women. There is no higher allowance for older children or teenagers.
Added Sugar vs. Natural Sugar
Your body breaks down all sugars the same way at the molecular level. The difference is in what comes along for the ride. The sugar in an apple arrives packaged with fiber, water, and vitamins. Fiber slows digestion, which means the sugar enters your bloodstream gradually instead of all at once. That’s why eating a whole piece of fruit doesn’t cause the same blood sugar spike as drinking a glass of juice or eating a handful of candy.
Added sugars, on the other hand, show up in foods that often lack fiber or meaningful nutrients. They get absorbed quickly, which can lead to a rapid rise in blood sugar followed by a crash that leaves you hungry again soon after. When guidelines refer to a daily sugar limit, they’re talking about these added sugars, not the naturally occurring sugar in whole fruits, plain milk, or unsweetened vegetables.
What Happens When You Consistently Exceed the Limit
Occasional treats aren’t the concern. The risk comes from a pattern of excess over months and years. Regularly consuming too much added sugar contributes to weight gain, type 2 diabetes, and heart disease. It also increases the risk of non-alcoholic fatty liver disease, because your liver converts excess fructose into fat. Over time, chronically high sugar intake can drive insulin resistance, a condition where your cells stop responding efficiently to insulin and your blood sugar stays elevated.
There’s also a dental component. Sugar feeds the bacteria in your mouth that produce acid, wearing down enamel and promoting cavities. This is one of the reasons the WHO pushed for its stricter 5% target: the evidence on tooth decay was particularly strong at that threshold.
How to Spot Hidden Sugars on Labels
Food labels in the U.S. now list “Added Sugars” as a separate line under “Total Sugars,” which makes the math straightforward. But the ingredient list is where things get tricky, because sugar goes by dozens of names. Common ones include cane sugar, high-fructose corn syrup, rice syrup, molasses, honey, agave, and caramel. Any ingredient ending in “-ose” is also a sugar: glucose, fructose, maltose, dextrose, sucrose.
Terms like “glazed,” “candied,” “caramelized,” or “frosted” in a product name or ingredient list signal that sugar was added during processing. And don’t assume savory foods are safe. Pasta sauces, salad dressings, bread, flavored oatmeal, and granola bars frequently contain several grams of added sugar per serving. A single flavored yogurt can pack 15 to 20 grams, eating up most of your daily budget before lunch.
Practical Ways to Stay Within the Limit
Start with beverages. Sugary drinks are the single largest source of added sugar in the average American diet. Swapping regular soda, sweet tea, or specialty coffee drinks for water, sparkling water, or unsweetened versions cuts sugar intake dramatically with minimal effort. That one 12-ounce soda you skip saves you roughly 40 grams, more than an entire day’s allowance.
At the grocery store, compare labels within the same product category. Two brands of tomato sauce can differ by 8 or 10 grams of sugar per serving. Choose plain versions of yogurt, oatmeal, and cereal, then add your own fruit for sweetness. Whole fruit gives you fiber and volume that added sweeteners don’t.
When cooking at home, you can usually reduce the sugar in recipes by a quarter to a third without noticing a major difference in taste, especially in baked goods and sauces. Your palate adjusts within a few weeks, and foods that once tasted normal may start to taste overly sweet.