Abstract
MESSRS. Rosenheim and Webster, in their very interesting letter to NATURE of Sept. 24, have suggested that it should be possible to make margarine into “a perfect biological substitute for butter” by incorporation of a suitable content of the vitamins A and D. It would appear from this communication and from other recently published statements that it is not generally known that this problem has actually been solved, and that to-day it is possible to purchase margarine containing regular and uniform quantities of both vitamins of the same order as the quantities found in butter.
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TAINSH, P. The Sources of Supply of Vitamins A and D. Nature 120, 515 (1927). https://doi.org/10.1038/120515c0
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DOI: https://doi.org/10.1038/120515c0
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