Nutrition is the biological and chemical process through which an organism utilizes food to support its normal life. It involves absorption, assimilation, production, metabolism and elimination. An imbalance in nutrition can result in ill-health, disease and death. Here are some of the major food sources for nutrition. Plants and animals contain different kinds of nutrients, including vitamins, minerals, carbohydrates, proteins, fat, water and fibre. The human body needs all of these food substances to survive. But some of these elements are deficient in the diet that humans are supposed to have. One of the major areas of concern in nutrition is to ensure the adequate intake of vitamins, minerals, carbohydrates, fats, proteins, and other nutrients. Carbohydrate is one of the important sources of nutrition. It provides energy to the body and is used for daily activities. Carbohydrates are divided into two main categories: complex carbohydrate foods and simple carbohydrate foods. Foods rich in carbohydrates are categorized as good nutrition foods, while foods containing simple carbohydrates are categorized as bad nutrition foods. Vitamin D and calcium are two nutrients that are considered to be essential to maintain a healthy living. Vitamins D and K are fat soluble and are synthesized in the liver. Calcium is absorbed by the intestines and helps in the absorption of other nutrients. Good nutrition requires adequate intake of vitamins, particularly vitamin D, vitamin K, and calcium. A diet rich in fat is considered to be unhealthy. To avoid this, you should include a lot of low fat dairy products and low fat meats in your diet. Healthy nutrition emphasizes eating complex carbohydrates such as whole grains, wholemeal breads, fruits and vegetables. Complex carbohydrates give energy to the body and make it possible to control weight. You can eat more fruits and vegetables than you like, but remember not to eat too much of these nutrients as they are extremely fatty. A balanced diet helps us to live a healthy life, even at old age. Our immune system and digestive system function properly if we eat a well balanced diet that contains all the nutrients we need. Good nutrition helps us to grow and mature healthily. In order to stay fit, you should include a lot of protein in your diet. Meat and fish are good choices if you prefer them. The main aim of nutrition is to provide the right balance of nutrients required by the body. Nutrient deficiencies cause diseases and ailments and it is very important to take the proper amount of supplements. The human body uses all the nutrients including the essential ones. It is essential to consume the right kinds of food at the right times in order to get all the nutrients that the body needs. Our nutritional status largely depends on the type of lifestyle and food habits that we adopt. The intake of some vitamins and minerals supplements may be necessary for the overall growth and development of an individual. Most of the people do not take proper care of their nutritional status. They are not aware of the advantages and disadvantages of their nutritional habits. Hence, a healthy diet makes them healthier by not only improving their body mass index, but also improves their overall personality. Carbohydrates are the main source of energy for the human body. However, too much carbohydrate intake can be bad for the health. A diet rich in carbohydrates is not healthy for an athlete or a person who exercises. Proteins are the building blocks of our body tissues, but too much protein or carbohydrates can clog up the digestive tract and reduce the amount of nutrients available to the body cells. Vitamins and minerals are also obtained from natural sources such as fruits and vegetables. However, some of the most important sources of vitamins and minerals are from animal sources such as meat, dairy products and eggs. Animal-derived foods contain more fat, oil and salt than plant-based sources. So, a vegetarian diet can be rich in calories, but it can also be low in nutrients. Eating too many calories without putting any quality minerals in the body can lead to obesity and other related diseases. Some of the essential nutrients that are missing from a typical American diet include fatty acids, zinc and magnesium, which are important for the production of hormones, bones and muscles. Too few calories without adequate amounts of nutrients can make a person sick. And thatҳ not good for a pregnant woman.