How much sugar in a smoothie is too much?

Added sugar over 10 g, the line the US guidelines set for a whole meal. The sugar in whole fruit and plain milk isn’t added sugar, but two portions of fruit already bring about 20 to 37 g, so stop at two portions and skip the juice.

Sugar advice about smoothies tends to fall off one of two cliffs. One side says all sugar is sugar, so a banana is as bad as a donut. The other says fruit sugar is natural, so a glass of fruit, juice, dates and a squeeze of honey must be fine. The 2025 to 2030 US guidelines settle it with one rule, that “one meal should contain no more than 10 grams of added sugars.” The sugar in “fruits and plain milk” isn’t counted.

Ten grams is about two and a half teaspoons of sugar. A tablespoon of honey is 17 g, so it blows through the line on its own.

Sugar as teaspoons, against a 12 oz cola

10 g, a meal's line

Which sugar counts as added?

The guidelines list the names: “turbinado sugar,” “fruit juice concentrate,” “honey,” “molasses,” cane sugar, agave and corn syrups, and plenty more. Here’s what that means for the usual smoothie ingredients.

One Medjool date has more sugar than a whole banana, and a cup of milk has more than a cup of frozen strawberries, and none of it counts against the 10 g.

Why stop at two portions of fruit?

Two portions is our own line. A banana and a cup of strawberries bring about 21 g of sugar, and a banana and a cup of mango bring about 37 g. Past two portions, the glass is mostly fruit sugar, and there’s no room left for the protein that makes it a meal. Two portions is also about the guidelines’ whole day of fruit, which is 2 servings at 2,000 calories.

Juice gets its own rule because it’s fruit with the fiber taken out. A cup of orange juice has 21 g of sugar and half a gram of fiber. Is it OK to use juice in a smoothie? covers why we’d skip it.

How much sugar is in a chain smoothie?

A lot, and much of it is added. The 20 oz Caribbean Way lists bananas, strawberries, papaya juice blend and turbinado, and has 83 g of sugar with 50 g added (Smoothie King’s menu, November 2026). That’s more sugar than two 12 oz colas. How much sugar is in a Smoothie King smoothie? has four more.

Our sugar calculator stacks any glass as teaspoons beside a can of cola, and its game, Which has more sugar?, is ten rounds of surprises like the date and the banana.