Although the central concept of marginalism is that of marginal utility, marginalists, following the lead of Alfred Marshall, drew upon the idea of marginal physical productivity in explanation of cost.
The Dietary Guidelines for Americans recommends that carbohydrates make up 45 to 65 percent of your total daily calories. So, if you get 2,000 calories a day, between 900 and 1,300 calories should be from carbohydrates.That translates to between 225 and 325 grams of carbohydrates a day.You can find the carbohydrate content of packaged foods on the Nutrition Facts label.o, if you get 2,000 calories a day, between 900 and 1,300 calories should be from carbohydrates. That translates to between 225 and 325 grams of carbohydrates a day. You can find the carbohydrate content of packaged foods on the Nutrition Facts label.
The Acceptable Macronutrient Distribution Range, or AMDR, for carbohydrates is the percentage of your total calorie intake that should come from carbs each day. Carbohydrates should make up the largest percentage of your calories, compared with protein or fat, but the carb AMDR is quite variable. According to the Institute of Medicine, the carbohydrate AMDR is 45 to 65, meaning 45 to 65 percent of your daily calories should come from carbs.