The answer to this is yes, but maybe not in the way you think. You can’t change your body’s natural BMR, but you can definitely change the number of calories your body uses in a few ways.
The best way, and probably the easiest for most people, is by moving it around a lot. This activity is also called “exercise!” Although experts disagree on how much you can change your metabolism through exercise, a steady, reliable regimen of physical activity will definitely help keep your body operating at its optimum capacity.
Other factors that can change your metabolism include medications that can slow it or speed it up (though that’s definitely not the way we recommend losing weight). Eating breakfast every day has also been shown to increase your metabolism, and food in the morning is essential to fueling your body through to lunch. Also, age is a factor, too–older people tend to have to work harder to make their bodies spend enough calories to make a difference in how much weight they gain or lose.