What is the term for nutrients required by the body that must be obtained through the diet on a regular basis?

The term for nutrients that the body cannot synthesize in sufficient quantities and must be obtained through the diet is "essential nutrients." These nutrients play critical roles in various bodily functions, including growth, repair, and overall maintenance of health. Essential nutrients include certain amino acids, fatty acids, vitamins, and minerals that are vital for metabolic processes.

Macronutrients, which consist of carbohydrates, proteins, and fats, are also required by the body but are generally needed in larger amounts rather than being classified as essential based purely on dietary necessity. Micronutrients refer to vitamins and minerals needed in smaller amounts but are not defined solely by their diet-based necessity. Non-essential nutrients, on the other hand, can be synthesized by the body and therefore do not need to be consumed regularly from food sources.