Dietary substances are components found in food that provide essential nutrients for the body. These include macronutrients like carbohydrates, proteins, and fats, which supply energy, as well as micronutrients such as vitamins and minerals that support various bodily functions. A balanced diet containing these substances is crucial for maintaining health and preventing deficiencies. In addition to nutrients, dietary substances can also include dietary fiber, which aids digestion, and phytochemicals, found in plant-based foods, that may offer health benefits. Understanding these substances helps individuals make informed choices about their diets and overall well-being.