Triglycerides of 3.40 mmol/L are high and require intervention, and are serious if chronically elevated. In general the normal reference level for triglycerides is <1.7mmol/L, therefore triglycerides 3.4mmol/L is out of the normal range and meets the diagnostic criteria for hypertriglyceridemia. Long-term uncontrolled elevation of triglycerides may increase the risk of atherosclerosis, coronary heart disease, stroke and other diseases, and therefore timely intervention is needed. Lifestyle interventions are usually needed first, which mainly focus on avoiding oily and high-salt diets, abstaining from smoking and alcohol, and maintaining appropriate physical activity. Medication can also be given, in the form of fibrates such as fenofibrate, benzofibrate, and gemfibrozil, and statins such as Rosuvastatin. If triglyceride level is found to be elevated, it is recommended to consult a doctor in a timely manner to standardize the diagnosis and treatment according to the doctor's instructions.