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To the Editor:
—I was interested in the query on the emulsification of cod liver oil and vitamins (The Journal, February 27, p. 645), and do not believe that general opinion agrees with your statements that emulsified cod liver oil is equal in vitamin potency to the unemulsified cod liver oil. This would hardly seem true if for no other reason than that emulsified oil contains not more than 50 per cent of cod liver oil and consequently there would be 50 per cent less vitamin in the same dose. Tests made on a number of samples of emulsified cod liver oil have shown that even when allowance is made for the difference in cod liver oil content, there is proportionately less vitamin A content in emulsified cod liver oil. This may be due to the fact that vitamin A in emulsified oil is less stable than in oils not
Anderson JF. VITAMIN POTENCY OF COD LIVER OIL. JAMA. 1926;86(13):970. doi:10.1001/jama.1926.02670390050032
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