When you lose weight, fat cells shrink, but studies suggest that adding fat cells is easier than losing them. Extreme dieting followed by overeating can cause the body to add fat cells to capture more energy. Competitors who go through cycles of extreme dieting and bulking may find it harder to get lean each time because they are adding fat cells to their body. While you can shrink fat cells, there is no known way to get rid of them once they are added. Therefore, it's important to maintain a healthy lifestyle and avoid extreme dieting or cheat days that can lead to adding more fat cells.