Exploring the Effects of Korean-Style Mediterranean Diet (KORMED) and Physical Activity Measurement in Patients With MGUS/SMM: A Pilot Study

Inclusion Criteria: Participants must meet all of the following: Adults aged 19 to 80 years at the time of enrollment. Diagnosed with MGUS (Monoclonal Gammopathy of Undetermined Significance) or Smoldering Multiple Myeloma (SMM) according to standard criteria. Able and willing to follow a Korean-style Mediterranean diet (KORMED) for 12 weeks. Able to use a smartphone and wearable device to track daily physical activity. Willing to attend study visits and provide blood, stool, and questionnaire data at scheduled time points. Able to understand the study procedures and provide written informed consent. Exclusion Criteria: * Participants will not be eligible if they meet any of the following: Diagnosis of active multiple myeloma requiring treatment. Current participation in another interventional clinical trial. Severe liver, kidney, or heart disease that would make the diet or study procedures unsafe. Uncontrolled infection or serious medical condition that may interfere with participation. History of major gastrointestinal surgery that prevents adherence to the diet. Pregnant or breastfeeding, or planning to become pregnant during the study period. Allergy or intolerance to key components of the KORMED diet (e.g., fish, nuts, legumes) that prevents safe participation. Any condition, in the investigator's judgment, that would make participation unsafe or limit the ability to complete the study.