If you want to weigh less, you’ve got to eat less, right? Well, if you take in too few calories, it can cause your body to lose muscle mass, which will decrease the rate of your metabolism. Plus, when you skimp on calories, your body slows the rate at which is burns calories to conserve the fuel it's got. “Under-fueling is just as risky as over-fueling,” explains Carolyn Brown, MS RD at Foodtrainers in Manhattan. Lisa Moskovitz, RD, CDN agrees: “In an attempt for quick, noticeable weight loss, many people wrongfully believe that eating as few calories as possible is the best solution. Not only can this lead to numerous nutritional deficiencies as the body is getting less food overall, it can actually have the opposite effect on weight loss.” Instead of cutting calories like crazy, use the simple diet and exercise hacks below that can help you slim down quickly and safely without screwing up your metabolism.