The foundation for successful weight loss is having a balanced diet and cutting back on a sedentary lifestyle and overeating. If that doesn't help, and before you start getting into diet fads or bogus promises, maybe Mother Nature can help you accomplish your goals. Before modern medicine and frozen entrees, people relied on nature to help them meet their nutritional needs. This included natural foods to help prevent chronic diseases and to enhance the immune system. For the most part, this worked! Since the body needs proper fuel to keep going, finding the right balance is key in losing weight and remaining fit. If we are honest, "many of the foods you eat are metabolized quickly, you'll find yourself feeling hungry more often, which could mean more snacking and a higher calorie intake," prevention.com offered. Our bodies are exposed sometimes to all kinds of bad foods and this could be impeding on our weight loss goals. From healthy fats to high-protein gems, here are 6 of the world's most nutritious foods and how they can help you slim down.