how come some people eat a lot and don’t gain weight??

Question: how come some people eat a lot and don't gain weight??
- Keywords:
  eat,
  human,
  weight
Asked by to Zena on 19 Jun 2014. This question was also asked by .
- Zena Hira answered on 19 Jun 2014:
  
  They have a higher metabolisms than others . Metabolism is the rate at which your body burns calories. Also working out helps a lot. Or if you have muscle you will need more calories to maintain the muscle therefore you can eat more and not gain weight

Question: how come some people eat a lot and don't gain weight??