More on Fish Oil

To the Editor: In a letter to the Journal (Sept. 25 issue), 1 Simopoulos and Salem suggested that terrestrial sources of omega-3 fatty acids might be cultivated to help increase the human intake of this class of fatty acids. They noted that omega-3 fatty acids are relatively concentrated in purslane as compared with other leafy vegetables, such as spinach, mustard greens, red leaf lettuce, and so forth. The omega-3 fatty acid present in land-based plants is linolenic acid (C18:3ω3), the predominant polyunsaturated fatty acid in linseed oil. The implication of their suggestion was that the omega-3 fatty acid linolenic acid would . . . No extract is available for articles shorter than 400 words.