The field ofnutrition deals with the consumption of certain nutrients, which the body needs for its proper functioning. A lack of propernutrition may lead to disease, starvation, or even death. Poor nutrition may also result in a violent breakdown of body parts, such as the liver, muscles, or intestines. The effects of inadequate nutrition are widespread and global. In addition, a lack of the right nutrients can result in a variety of health issues, including obesity, mental illness, and addiction. The study of nutrition encompasses many aspects of food and its effects on the body. For example, it covers the relationship between diet and health. Science-based, nutrition experts use ideas from molecular biology, genetics, and biochemistry to better understand the relationship between food and health. In general, they aim to improve the quality of life and reduce the risk of disease and allergies. A variety of nutritious foods is important for good health. Moreover, it is useful to read labels to make informed choices. Vitamin A is a fat-soluble vitamin and is essential for vision, immune function, and reproduction. It is found in animal foods and in fortified foods. However, it is not necessary to eat animal products to get enough of this vitamin. Instead, eat plenty of orange and green vegetables and take a supplement containing this vitamin. They can also be used in cooking. These sources contain enough of these nutrients to make a healthy meal.