The foods you eat have a huge effect on your health and quality of your life. A good diet can improve all aspects of life, from brain function to physical performance Research links serious disease to poor diet. Food affects your cells and organs. The three macronutrients needed in large amounts are carbs, fats and protein. Minerals play key roles in your cells and organs. Basing your diet on whole foods (natural unprocessed foods) is an extremely effective but simple strategy to improve health and loose weight. Overeating certain foods can increase disease risk and lead to weight gain.Create a healthy diet that you can enjoy and stick with for a long term. If you want unhealthy foods, save them for an occasional treat.