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The Institute of Medicine recommends a minimum of 130 grams of carbohydrates per day, which is the average minimal usage of glucose that the brain uses on a daily basis. You need 2,361 Calories/day to maintain your weight. You should take 252 (40%) - 472 (75%) grams of carbohydrate for your energy needs. (55% = 346 grams, 65% = 409 grams). You need 1,861 Calories/day to lose 0.5 kg per week. You should take 198 (40%) - 372 (75%) grams of carbohydrate for your energy needs. (55% = 273 grams, 65% = 323 grams). You need 1,361 Calories/day to lose 1 kg per week. You should take 145 (40%) - 272 (75%) grams of carbohydrate for your energy needs. (55% = 200 grams, 65% = 236 grams). You need 2,861 Calories/day to gain 0.5 kg per week. You should take 305 (40%) - 572 (75%) grams of carbohydrate for your energy needs.
For weight loss 20-60 grams of carbohydrate are recommended per day, depending on your level of activity. However, 60 grams would be rather too much for those who might be insulin resistance and, by that, have great difficulty losing weight, gain weight very easily, or have a history of repeated dieting.