Purslane: A Terrestrial Source of Omega-3 Fatty Acids

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Abstract
To the Editor: Over the past year and a half, the Journal has devoted a number of pages to the beneficial effects of omega-3 fatty acids in marine oils on serum cholesterol and triglycerides and on the immunologic function of neutrophils and monocytes.1 2 3 The omega-3 fatty acids found in aquatic animals come from plankton and other feed ingested by the fish, from metabolism by the fish of components of its diet, or from a combination of both processes.It is known that terrestrial plants contain not only linoleic acid (18:2ω6) but also the omega-3 polyunsaturate alpha-linolenic acid (18:3ω3). The latter . . .