Dietary categories refer to the classifications of food based on their nutritional content and the role they play in a person's diet. Common categories include fruits, vegetables, grains, proteins, and dairy. Each category provides essential nutrients that contribute to overall health, such as vitamins, minerals, and macronutrients. People often follow specific dietary patterns, such as vegetarianism or veganism, which restrict certain food groups for health, ethical, or environmental reasons. Understanding these categories helps individuals make informed choices about their diets, ensuring they receive a balanced intake of nutrients necessary for optimal well-being.