A gram of sugar is a gram of sugar, chemically speaking — so why do nutritionists treat the sugar in fruit so differently from the sugar in candy? The answer is what comes with it.
Natural sugars come with a package
Natural sugars occur in whole foods: fructose in fruit, lactose in milk. Crucially, they arrive bundled with fiber, water, vitamins, and protein. Fiber slows how fast the sugar hits your bloodstream, and the water and bulk fill you up, so you naturally eat less. An orange's sugar is released slowly; you'd struggle to eat six oranges, but six oranges' worth of juice goes down in seconds.
Added sugars come alone
Added sugars are put into foods and drinks during processing — table sugar, corn syrup, honey, cane juice. They deliver quickly absorbed calories with little or no fiber, protein, or nutrients to balance them. That's why they're often called 'empty calories,' and why they're the target of every major sugar guideline.
How the label separates them
The Nutrition Facts label makes the distinction visible with two lines: Total Sugars and Added Sugars. Plain milk shows total sugars but zero added; soda shows the two numbers nearly equal because almost all of it is added.
The gray areas
Some cases blur the line. Fruit juice, even '100% juice,' concentrates natural sugar and strips the fiber, so it behaves more like an added-sugar drink — see fruit juice vs. whole fruit. And fruit juice concentrate used to sweeten a product is legally counted as added sugar. The safest rule: get your sugar from whole foods, and treat concentrated or added forms as the ones to limit.