The purpose of this was to analyse zinc intakes and effect of Zn(30mgZnSO4/day) supplementation on plasma zinc level, serum HDL-cholesterol and serum Alkaline Phosphatase (AP) activity of Korean adults. The men consumed 8.52($pm$2.08)mg of zinc, and the women consumed 6.4($pm$2.62)mg of zinc. Although protein intakes of subjects were lower than normal values. The first source of zinc was cereal and grain group, the second was meat, fish, egg and soybean group. Two food groups supplied about 80% of zinc. After two weeks of zinc supplementation, the zinc concentration in plasma was significantly increased. The highest plasma zinc level was 78.80ug/dl(men), 76.04ug/dl(women) at 2 weeks after zinc supplementation(p<0.05). Serum DHL-cholesterol was significantly decreased by zinc supplementation. The lowest serum HDL-cholesterol level was 39.29mg/dl(men), 44.84mg/dl(women) at 4 weeks after zinc supplementation(p<0.01). Serum AP activity was significantly increased by zinc supplementation. The highest AP activity was 86.40units/L(man), 67.93units/L(women) at 2 weeks after zinc supplementation(p<0.05). It seems that the supplementation of 30mg ZnSO4/day can be beneficial for improving zinc nutriture. However it can be negative factor on coronary heart disease because serum HDL-cholesterol was significantly decreased(p<0.01)