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Nutrition Encyclopedia Entry 1777119244

Nutrition is the process by which organisms obtain and utilize food to sustain life, growth, and maintenance of bodily functions. ## Overview Nutrition is a vital aspect of human health, encompassing the intake and utilization of nutrients from food to support growth, maintenance, and repair of body tissues. Adequate nutrition is essential for the proper functioning of bodily systems, including the nervous, circulatory, and digestive systems. A well-balanced diet provides the necessary energy, vitamins, and minerals for optimal physical and mental performance. Poor nutrition, on the other hand, can lead to various health problems, including obesity, malnutrition, and chronic diseases such as heart disease, diabetes, and certain cancers. Nutrition involves the consumption of macronutrients (carbohydrates, proteins, and fats) and micronutrients (vitamins and minerals) from various food sources, including fruits, vegetables, whole grains, lean proteins, and healthy fats. The human body requires a delicate balance of these nutrients to maintain optimal health. A diet that is deficient in essential nutrients can lead to malnutrition, which can cause a range of health problems, including weakened immune systems, fatigue, and impaired cognitive function. ## History/Background The concept of nutrition dates back to ancient civilizations, where people recognized the importance of food for survival and health. The ancient Greeks and Romans believed that a balanced diet was essential for maintaining good health, and they developed various theories about the role of food in the body. In the 18th and 19th centuries, scientists such as Antoine Lavoisier and Justus von Liebig made significant contributions to the understanding of nutrition, identifying the role of oxygen, nitrogen, and other elements in the human body. In the early 20th century, the discovery of vitamins and minerals revolutionized the field of nutrition. Scientists such as Elmer McCollum and Edward Mellanby identified the essential nutrients required for human health, including vitamin A, vitamin D, and iron. The development of nutritional science continued to advance in the mid-20th century, with the discovery of the importance of fiber, antioxidants, and other nutrients. ## Key Information Nutrition is a complex process that involves the intake, digestion, absorption, and utilization of nutrients from food. The process begins with the consumption of food, which is then broken down into smaller molecules through digestion. The nutrients are then absorbed into the bloodstream, where they are transported to various tissues and organs throughout the body. A well-balanced diet provides the necessary nutrients for optimal health. The recommended daily intake of macronutrients includes: * Carbohydrates: 45-65% of total energy intake * Protein: 10-35% of total energy intake * Fats: 20-35% of total energy intake The recommended daily intake of micronutrients includes: * Vitamin A: 700-900 μg/day * Vitamin D: 600-800 IU/day * Calcium: 1,000-1,200 mg/day * Iron: 8-18 mg/day ## Significance Nutrition plays a critical role in maintaining optimal health and preventing chronic diseases. A well-balanced diet can help to: * Maintain a healthy weight * Support immune function * Reduce the risk of chronic diseases such as heart disease, diabetes, and certain cancers * Support cognitive function and mental health INFOBOX: - Name: Nutrition - Type: Scientific field - Date: Ancient civilizations (3000 BCE) - Location: Global - Known For: Understanding the role of food in human health TAGS: Nutrition, diet, health, wellness, macronutrients, micronutrients, vitamins, minerals, carbohydrates, proteins, fats, fiber, antioxidants.