Eat fibrous vegetables to increase transit time of food, improve digestion and improve weight loss. Increasing fiber intake from vegetables such as green leafy veggies, broccoli, cauliflower and other vegetables adds fiber, minerals and vitamins with very few calories or carbohydrates. Steaming your vegetables is usually the most tolerated way to consume vegetables, especially if you have digestive imbalances. Vegetables add bulk to the diet and will act as a natural appetite suppressant with very minimal calories. A diet high in vegetables, lean proteins, good fats and minimal carbohydrates usually accomplishes the best results for most people trying to lose weight.