" factors, including •genetics, •gender (basal metabolic rate is generally higher in men), •age (basal metabolic rate generally drops with age), •weight (basal metabolic rate generally increases with muscle mass), •height (basal metabolic rate generally increases with height), •diet (overfeeding or underfeeding), •body temperature, •external temperature (heating or cooling the body) and •organ function. "

― Jason Fung , The Obesity Code: Unlocking the Secrets of Weight Loss