LDL 1.21mmol/L is relatively normal and basically has no effect. Elevated LDL level is closely related to the development of atherosclerosis, LDL ≤3.4mmol/L is the appropriate level, between 3.4~4.1mmol/L is the borderline level, and if it exceeds 4.1mmol/L, it is elevated. If you have risk factors such as cerebral infarction, coronary heart disease, or hypertension, you need to have a level <1.8mmol/L. Therefore, 1.21mmol/L is the appropriate level. Therefore, 1.21mmol/L is a relatively ideal level, do not worry too much, usually continue to pay attention to diet to avoid greasy, quit smoking and drinking, appropriate physical exercise and do a good review of blood lipids, if necessary, please consult a doctor in a timely manner to comply with the doctor's instructions standardized diagnosis and treatment.