Homocysteine 21.3 is high, why?

Homocysteine 21.3μmol/L is usually considered high because it exceeds the normal range.

Homocysteine belongs to a sulfur-containing amino acid, which is usually converted from methionine and mainly obtained from food. Its normal range is 5-15μmol/L. It is often used in clinical diagnosis of coronary atherosclerotic heart disease, cerebral infarction, myocardial infarction and other diseases. However, 21.3μmol/L obviously exceeds this range, indicating abnormal examination and indicating increased risk of suffering from the above cardiovascular and cerebrovascular diseases. At the same time, homocysteine 21.3μmol/L may also be related to hypothyroidism, nephropathy and other diseases, belonging to abnormal manifestations.