how many calories should a person consume in a day
1 When food is eaten may matter as much as what and how many calories are eaten. 2  Average calorie consumption in industrialized nations and a growing number of emerging economies is higher than it used to be. 3  Approximately 20% of the energy used in the human body is for brain metabolism. The longer you chew your food, the more calories your body retains. 2  Recommended daily calorie intakes in the US are 2,700 for men and 2,200 for women. 3  Eating a big breakfast could help with weight reduction and maintenance.