The quickest way is to eat less and exercise more, strictly control the diet, and don't eat staple food or eat more. Drink 100ML skim milk or an apple in the morning, eat a whole wheat bread with an apple at noon and drink sugar-free yogurt in the afternoon. With proper exercise, this is absolutely effective. The key is persistence. As long as you persist, you can definitely become a VC. You can drink some VB and vitamin supplements. I wish you success in losing weight.