Nutrients are environmental substances used for energy, growth, and bodily functions by living organisms. Depending on the nutrient, these substances are needed in small amounts or large amounts.
Macronutrients provide calories or energy to the human body in the form of calories, and are required in large amounts. There are three classifications of macronutrients: carbohydrates, lipids (fats), and proteins.
Micronutrients are commonly referred to as vitamins and minerals, and include minerals like sodium, copper and zinc, and vitamins such as C, A, D and E.
Your body needs only very small quantities of micronutrients for survival. However, because micronutrients are vital to the proper functioning of all of your body’s systems, failure to get the small quantities that it requires can result in serious health problems.