This trial is testing how a plant-based diet, fish oil supplements, and turmeric supplements affect butyrate levels in the stool. The study involves people with specific blood conditions called MGUS or SMM. Researchers want to see if these dietary changes and supplements can increase butyrate, a substance in the gut that can influence health. Fish oil supplements have been shown to lower plasma triglyceride levels but may increase LDL cholesterol and apolipoprotein B levels.