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.
Based on these guidelines, goals for all adult women, including pregnant and nursing women, is to consume 45 to 65 percent of their total calorie intake from carbohydrates. For a 2,000-calorie diet, this means consuming 225 to 325 grams of carbs each day. The Institute of Medicine has also established a minimum carbohydrate requirement of 130 grams for women, 175 grams for pregnant women and 210 grams of carbs per day for women who are breastfeeding.