Abnormal circulating lipid concentration Decreased circulating HDL-C concentration Low HDL-cholesterol Reduced high-density lipoprotein cholesterol concentration Decreased circulating HDL-C concentration Decreased circulating high-density lipoprotein cholesterol Reduced high-density lipoprotein cholesterol level in blood Hypoalphalipoproteinemia Decreased circulating high-density lipoprotein levels UMLS:C0151691 SNOMEDCT_US:190785000 Decreased high-density lipoprotein cholesterol concentration Decreased high-density lipoprotein cholesterol level Decreased HDL cholesterol Reduced high-density lipoprotein cholesterol level Decreased high-density lipoprotein cholesterol level in blood HP:0003233 UMLS:C0473527 The concentration of high-density lipoprotein cholesterol in the blood circulation is below the lower limit of normal.