Lipid management: statin dosing time, dietary restrictions and monitoring frequency

Why should statins be taken before bed?

Cholesterol is mainly synthesized in the liver and small intestine. An important enzyme is involved: 3-hydroxy-3-methylglutaryl-CoA reductase (HMG-CoA reductase). This enzyme is most active at midnight and least active at midday. Cholesterol-lowering drugs, such as statins, primarily inhibit this enzyme. Therefore, to achieve the best cholesterol-lowering effect, statins should also be taken before bed.

What is an atherogenic diet?

An atherogenic diet mainly refers to a diet high in saturated fat and cholesterol. Studies have shown that this dietary pattern significantly increases the risk of ischemic cardiovascular disease. Epidemiological surveys in my country also indicate that this dietary pattern significantly increases dyslipidemia. On the other hand, people who consume more vegetables, fruits, whole grains, and unsaturated fatty acids have a lower baseline risk of cardiovascular disease. Meta-analyses of multiple international dietary therapies have shown that a balanced diet has good lipid-lowering and blood pressure-lowering effects.

Which foods are high in cholesterol?

Although 75% of the cholesterol in the body comes from its own synthesis and only 25% from ingested food, frequently consuming high-cholesterol foods will still raise cholesterol levels, leading to atherosclerosis in the long run. Therefore, understanding which foods are high in cholesterol can reduce or prevent hypercholesterolemia. Table 2-1 lists the specific cholesterol content of some foods.

How often should adults have their blood lipids checked, and who should be monitored closely?

Adults over 20 years of age should have their fasting blood lipids measured at least every 5 years, including total cholesterol (TC), LDL-C, HDL-C, and TG.

For ischemic cardiovascular disease and high-risk groups, blood lipids should be measured every 3–6 months. Patients hospitalized for ischemic cardiovascular disease should have their blood lipids checked upon admission or within 24 hours. The following key groups should be monitored regularly:

(1) Individuals with pre-existing coronary heart disease, cerebrovascular disease, or peripheral atherosclerotic disease.

(2) Individuals with hypertension, diabetes, obesity, or who smoke.

(3) Individuals with a family history of coronary heart disease or atherosclerosis, especially those with early-onset coronary heart disease or other atherosclerotic diseases in their immediate family.

(4) Individuals with xanthelasma.

(5) Individuals with familial hyperlipidemia.

(6) Men over 40 years of age and postmenopausal women should have their blood lipids checked annually.