You wouldn't have to straight up tell them that you are trying to lose weight. You could tell them you are eating healthy and exercising because you want to live a healthier lifestyle. Everyone's bodies are shaped differently, don't feel like you have to look like a model. God made you the way you are out of his own image and likeness. Also, don't be afraid to tell your parents the truth. Maybe you could exercise WITH your parents and help them lose some weight too!
Instead of satisfying your sweet tooth with some refined sugar, turn to berries and enjoy a slimmer waistline in no time without exercise. Berries are loaded with antioxidants, which can help reduce inflammation throughout the body, and research from the University of Michigan reveals that rats given a cherry-rich diet shaved off a significant proportion of their belly fat when compared to a control group. Berries like strawberries, raspberries, blueberries, and blackberries are also loaded with resveratrol, an antioxidant pigment that has been linked to reductions in belly fat and a reduced risk of dementia, to boot.