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ABSTRACT BUTTER is an important source of vitamins A and D in the diet, but the amounts present vary with the feeding of the cow and also, in the case of vitamin D, with the amount of

sunlight to which the animal is exposed. Summer butter is more potent than winter butter. Since much of the butter consumed in Great Britain is imported, it is essential to know whether it

can compare in vitamin value with the home-produced article and whether storage has any influence upon its potency. Experiments carried out during the past few years by Crawford, Perry and

Zilva on Australian, New Zealand and English butters add to our information on this subject.* Access through your institution Buy or subscribe This is a preview of subscription content,

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Vitamin Content of Butters. _Nature_ 131, 770 (1933). https://doi.org/10.1038/131770a0 Download citation * Issue Date: 27 May 1933 * DOI: https://doi.org/10.1038/131770a0 SHARE THIS ARTICLE

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