Food is the fuel your body runs on for energy; and don’t you want to put the best fuel in your body to provide you the most energy? You wouldn’t want to put dirty gas in your new car would you? Eating healthy is the simplest way to increase metabolism and boost energy. Proteins such as lean meats and eggs and complex carbohydrates such as fruits, vegetables and whole grains are ideal because they take longer to digest and provide a steady stream of energy. Whereas foods containing simple sugars such as soda and candy may give you a burst of energy for a short time, but not for a sustained period of time. Junk food doesn't contain the nutrients your body needs to stay healthy. As a result, these foods may make you feel lazy and have less energy you need to complete simple everyday tasks. The high levels of sugar in junk food puts your metabolism under stress; when you eat refined sugar, your pancreas secretes high amounts of insulin to prevent a dangerous spike in blood sugar levels. Because junk food don't contain adequate amounts of protein and good carbohydrates, your blood sugar levels will drop suddenly after eating, leaving you feeling grumpy, fatigued and craving sugar Eating healthy is the best way to get to and maintain a healthy weight. Ideal body composition is not achieved, not only by strenuous, hard work at the gym, but through a diet high in vegetables, fruits, lean meats, and whole grains. You can easily lose weight after several weeks of following a healthy diet. Exercise is more productive once you reach a healthy weight through a healthy eating lifestyle. Junk food contains large amounts of fat, and as fat accumulates in your body, you'll gain weight and could become obese. The more weight you gain, the more you'll be at risk for serious chronic illnesses such as diabetes, heart disease and arthritis. You could even have a heart attack. The high levels of fat and sodium in junk food can cause high blood pressure or hypertension. Excessive dietary sodium can also have a negative effect on kidney function, even leading to kidney disease. High levels of dietary fat can also lead to poor cognitive performance. You'll feel tired and have trouble concentrating because your body might not be getting enough oxygen. Nutritious foods help prevent disease by building a stronger immune system. Building up your immune system through healthy foods allows it to fight off illness naturally and recover quickly. The digestive system is home to tons of types of bacteria. These bacteria are there to keep the intestines healthy and also aid in breaking down food. These bacteria, also called probiotics are believed to keep the immune system healthy by regulating immune system response. You can ensure that your body and immune system run at optimal levels by eating plenty of colorful servings of fruits and veggies, fermented foods, and yogurt as well drinking plenty of water daily. The high levels of fat and sodium in junk food and fast food can contribute to heart disease by raising blood cholesterol levels and contributing to arterial plaque buildup. Over time, the high levels of sugar and simple carbohydrates in junk food can lead to type 2 diabetes. This occurs because eating too much sugar puts your metabolism under stress; when you eat a lot of refined white sugar and simple carbohydrates, your body has to up its insulin production to prevent a dangerous spike in blood sugar levels. Because junk food doesn't contain the protein or complex carbohydrates that your body needs to maintain consistent blood sugar levels, your blood sugar levels will drop suddenly soon after eating. You'll crave sugar and likely end up eating more junk food. Over time, this stress damages your body's ability to use the insulin secreted by your pancrease. A healthy diet can help maintain your body's insulin sensitivity. Eating too much junk food can make you feel really uncomfortable and can lead to mood swings and constipation, and lower your energy levels so that you lack interest in the exercise you need to burn off those extra calories. Vitamins and Minerals found in healthy foods will allow your body to regulate hormonal function throughout the day and promote deeper sleep at night. Eating healthy foods will also calm your nervous system and trigger a sleep-inducing hormonal response which helps you rest better at night. There is a well-known connection between the rise in sleep deprivation and soaring obesity rates. In other words, eat cleaner, sleep better, be healthier. While eating a small, balanced snack before bed may help you sleep, going to bed hungry and overeating can detract from sleep. If you're prone to heartburn, fatty and spicy foods before bed can cause flare-ups during the night, causing unwanted wake-ups. Poor sleep can then cause or worsen other short-term effects of an unhealthy diet, such as weight gain and reduced brain and exercise capabilities. In conclusion, eating healthy is in my opinion is the most important part of living a healthy lifestyle. Putting it quite simply, eating healthy foods will make you feel better. Whole vegetables, fruits, and lean proteins will balance your energy levels and leave you feeling great throughout the day. You will think more clearly, have better muscle tone, absorb nutrients more efficiently, and energy levels will soar.