Methods used to evaluate patients’ status include the Global Leadership Initiative on Malnutrition criteria, the MNA (mini nutritional assessment) and MUST (malnutrition universal screening tool) questionnaires, nutritional risk screening—2002, bioimpedance analysis (appendicular skeletal muscle index [ASMI]), body mass index, skeletal muscle mass using computed tomography (CT), and blood tests (total protein, albumin, hemoglobin, and prealbumin levels). The gene discussed is TTR; the disease is nutritional deficiency disease.