How low should LDL cholesterol be controlled to ensure safety?

There is no fixed “safe” value for low-density lipoprotein (LDL) cholesterol. In healthy individuals, LDL should remain below 3.4 mmol/L; in high-risk individuals, it should be controlled to less than 2.6 mmol/L; and in very-high-risk individuals, the target is stricter—below 1.8 mmol/L. Prolonged elevation of blood lipid levels accelerates the formation of arterial plaques. If repeated lipid profile tests consistently show elevated values, prompt medical evaluation is essential.

Low-density lipoprotein is the primary lipid component responsible for atherosclerosis. Excess LDL cholesterol deposits on the inner walls of blood vessels, gradually forming hardened plaques that narrow the vascular lumen. As plaques enlarge progressively, they impede blood flow and may trigger cardiovascular and cerebrovascular events such as angina pectoris and ischemic stroke. Mild elevations in LDL can often be managed through dietary modifications and regular physical activity, with periodic lipid monitoring to track changes.

Individuals with a history of coronary artery disease or ischemic stroke are classified as being at *very high risk*, requiring even more stringent LDL targets. Lifestyle interventions alone are usually insufficient to achieve these goals; long-term statin therapy is typically necessary to inhibit cholesterol synthesis and stabilize existing vascular plaques. During treatment, liver function and lipid levels must be monitored regularly, and medication regimens adjusted accordingly based on laboratory results.

Maintain a long-term, light, and balanced diet—limit intake of organ meats, fatty meats, pastries, and sweets—and engage in daily aerobic exercise to sustain a healthy body weight, thereby continuously optimizing lipid metabolism.