A group of men had their regular food intake cut in half. After 24 weeks, their weight stabilized at about three-fourths of their previous weight, even though they were allowed to eat only half of what they typically ate before. This limited weight loss was due, at least in part, to the fact that their dietary restriction led to .

Sharp decrease in metabolic rates

Explanation: Typically, when there is decrease in the intake of food, the body will reduce the metabolic rate to safe energy. Also a researcher, Gary Foster gave an estimate about lower intake of calories, he said that cutting down calories intake will reduce the rate of metabolism, by taking not more than 800 calories par day.

to keep it profesional sex is the main way humans reproduce

explanation: