hdl stands for high-density lipoprotein. If HDL is high, no special treatment is needed, it is a lipid indicator that can fight against atherosclerosis, and it is the only lipoprotein that is relatively higher among all lipids, and elevation helps prevent the occurrence of coronary heart disease. If patients have lower HDL, statins can help raise HDL. Patients are advised to pay attention to a low salt and low fat diet, eat more fresh fruits and vegetables, and good lifestyle habits on a regular basis, which can also help keep HDL within the normal range. Especially in elderly patients with cardiovascular disease, regular monitoring of this lipid index is needed to help better guide medication treatment. The main component of HDL is apolipoprotein a1. If abnormal HDL is present, it can be further tested for the presence of abnormal apolipoprotein a1. If apolipoprotein a1 is also reduced, then the relative risk of atherosclerosis is higher.