The United States Department of Health and Human Services recommends that carbohydrates provide 45 to 65 percent of total calories, plus 14 grams of fiber per 1,000 calories. For someone consuming 2,000 calories a day, that would be at least 900 calories, or 225 grams of sugars or starches.Continue Reading
One gram of digestible carbohydrate, not including fiber, provides four calories. For someone eating 2,000 calories per day, the recommendation is at least 253 grams of carbohydrates per day, including at least 28 grams of fiber.
Some specialized diets include far fewer carbohydrates than these guidelines recommend. These diets often function by inducing ketogenic metabolism, in which the body breaks down fat into chemicals called ketones in order to compensate for the absence of dietary carbohydrates.Learn more about Nutrition & Diets