Did you know that it is actually easier to lose weight than it is to gain weight? It is mathematically easier to lose than to gain. For example, if you eat 3,500 calories more than you burn, you will gain 0.3 pounds, but if you burn 3,500 calories more than you eat, you will lose 1 pound.
Also, if you want to lose weight, you can expose yourself to significant changes in temperature which speeds up your metabolism. The above information is based on a pure fat diet.