Is There Vitamin C In Milk

Is There Vitamin C In Milk

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Summary

• 1.

  Immediately after milking there is no dehydroascorbic acid in cows' milk.

• 2.

  During storage the dehydroascorbic acid increases until it supplies an important fraction of the total vitamin C in the milk. Between 1 and 6 mg. dehydroascorbic acid per liter are generally present in commercial mixed milk provided the milk is not exposed to light or contaminated with appreciable amounts of copper.

• 3.

  In milk contaminated with an appreciable amount of copper much of the vitamin C may be present in the form of dehydroascorbic acid as early as 1 day after milking.

• 4.

  Pasteurization destroys most of the dehydroascorbic acid. However, in commercially pasteurized milk, by the time it is bottled and ready for delivery, additional amounts of dehydroascorbie acid are formed.

• 5.

  In pasteurized deaerated milk the vitamin C is entirely in the form of reduced ascorbic acid and is stable.

References

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Article Info

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DOI: https://doi.org/10.3168/jds.S0022-0302(43)92688-8

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© 1943 American Dairy Science Association. Published by Elsevier Inc.

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Is There Vitamin C In Milk

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