Mounjaro, when used to treat obesity, may help reduce portion sizes by influencing the mechanisms that regulate appetite and satiety. Patients often notice that they feel full more quickly whilst eating, which naturally leads to a reduction in calorie intake. As a result, it becomes easier to maintain an energy deficit without the need for restrictive diets. This effect develops gradually and varies from patient to patient, so it requires time and monitoring. Mounjaro supports the process of changing eating habits, but it does not replace a mindful approach to eating.