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Why can some people eat whatever they want and never gain weight?

Updated: Jul 31, 2018

Certain people can eat anything they want and never gain weight because of their genetic makeup. Metabolism is the biggest genetic component that explains this phenomenon. The faster a person’s basal metabolic rate or BMR is the more that they can eat without gaining weight. The BMR describes the amount of energy expended while a person is at rest. A very active lifestyle will also allow a person to eat much more food without gaining fat. Increasing daily activity levels or adding an exercise routine requires more energy and results in additional calories burned. Even small movements such as fidgeting can burn up to a few hundred calories a day. As long as the body is burning more calories than it’s consuming, then there will be no weight gain. Even though genetics play a critical role in chronic weight gain, lifestyle choices can still counteract these predispositions and steer an individual towards a healthy life.

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