Abstract
There has been widespread coverage in the news media recently of the claim that the drinking of homogenized milk is a cause of excessive mortality from coronary artery disease in the United States. That this relationship might exist has been proposed by Oster,<sup>1</sup>who postulates the existence of a group of diseases caused by the depletion of<i>plasmalogen</i>in cell membranes. He includes arteriosclerosis, myocardial infarction, and angina pectoris as representative disorders with this possible origin. Plasmalogens are a type of phospholipid usually found as a component of cell membranes of muscle and of the myelin sheath of nerve fibers. The major plasmalogen of myocardium is a choline phosphatide containing an unsaturated fatty acid in a typical ester linkage and a second fatty acid as a vinyl ether,<sup>2</sup>thereby differing from the more usual phospholipid exemplified by lecithin. Fatty aldehydes or plasmals can be released from this second
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