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—In the query and answer entitled "Chlorophyll" published in The Journal, September 1, page 99, the term "chlorophyllin" should have been used instead of "chlorophyll." Chlorophyll as it naturally exists in plants is an oil-soluble substance, relatively unassimilable in the alimentary tract. Chlorophyllin is a water-soluble salt of chlorophyll.
Chlorophyll and Chlorophyllin.. JAMA. 1951;147(14):1400. doi:10.1001/jama.1951.03670310090046