For Durkheim the result of the division of labour is positive in that there is no need to compete in the sense of struggling just to survive. Division of Labour. The division of labour is, then, a result of the struggle for existence, but is a mellowed dnouement.
Recommended daily calorie intakes vary across the world. According to the National Health Service (NHS), UK, the average male adult needs approximately 2,500 calories per day to keep his weight constant, while the average adult female needs 2,000. US authorities recommend 2,700 calories per day for men and 2,200 for women.
The USDA estimates that female teens need 1,800 to 2,400 calories per day and male teens need 2,000 to 3,200 calories per day. In comparison, adult females need 1,800 to 2,200 calories and adult males need 2,000 to 2,600 calories. Weight can determine whether a teen is eating an appropriate number of calories.