👉 Regimen is a method or schedule of activities that a person follows in order to maintain health and wellness. It's an important part of many people's daily routines, including exercise, diet, sleep, stress management, and more. In nutrition science, regimens are known as "diet plans" or "meal plans." They are usually formulated by a registered dietitian based on the individual's age, gender, weight, height, and activity level. A diet plan typically includes specific foods and dietary