When should a patient be evaluated for reasons behind unexpected weight loss?

A patient should be evaluated for reasons behind unexpected weight loss when they present below their target weight because this indicates that their current health and dietary management may not be optimal. Weight loss can signal various underlying issues that could affect a patient's overall health, treatment adherence, and nutritional status. Target weights are often set based on individual health goals and treatment plans, and deviating from these targets can require intervention to ensure that the patient is receiving adequate nutrition and care.

Evaluating weight loss in this context allows healthcare providers to address any potential complications early on, adjust treatment plans if necessary, and support the patient's overall well-being. Monitoring weight is a critical aspect of patient care, especially in populations with specific dietary needs or health challenges, such as those undergoing dialysis.