When you lose even a modest amount of weight, there is a possibility that you will experience side effects such as a slowing of your metabolism and a reduction in the number of calories you burn when you are at rest. That is because your body has adapted to your new weight and is no longer burning as many calories as it once did. During weight loss, engaging in resistance exercise and consuming an adequate amount of protein can help preserve lean body mass, which can be advantageous for the upkeep of your metabolism. Additionally, consuming a proper amount of carbohydrates can help maintain your body's glycogen stores. Consuming an appropriate amount of carbs can also contribute to the preservation of a healthy blood sugar level.