An epidemiological survey was made on dietary calcium intake, serum total calcium and ionized calcium ion, and serum lipid compositions. Compared with 120 normotensive controls, 101 hypertensive subjects were significantly higher in the levels of serum cholesterol and triglyceride, but lower in HDL-cholesterol and higher in the ratio of total choesterol/HDL-chol Hypertensive subjects were also significantly lower in the relative amount of fatty acids C18:2 but higher in those of C20:0, C20:2 and total amount of saturated fatty acids(longer than C14:0) than control serum. Patients were significantly lower in serum total calcium and ionized calcium ion concentrations and significantly less calcium ingestion from milk and dairy produces by feeding frequency test.