CHAPTER 1: WHAT IS NUTRITION?Food provides many nutrients and non-nutrients that work together to regulate and maintain body processes. There are six classes of nutrients: carbohydrates, protein, fats, vitamins, minerals, and water. Many factors affect our food choices such as taste, culture, social reasons, trends, advertising, time, habits, and emotions. Nutrition is the science of how nutrients in foods nourish you and affect your health. Good nutrition can help prevent risk of many chronic diseases and conditions. In order for our bodies to function properly, the six classes of nutrients are needed in various amounts. Carbohydrates, lipids, and proteins are macronutrients because you need higher amounts of them in your diet. They provide energy which is measured in calories. Vitamins and minerals are micronutrients because they are needed in smaller amounts. Vitamins and minerals are essential for metabolism because they play a role in many chemical reactions and body processes. Water is part of the medium inside and outside of cells that that carries
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