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Nutrient content of liquid milk

I. Vitamins A, D3, C and of the B complex in pasteurized bulk liquid milk

Published online by Cambridge University Press:  01 June 2009

K. John Scott
Affiliation:
†National Institute for Research in Dairying (University of Reading), Shinfield, Reading RG2 9 AT, UK
Dinah R. Bishop
Affiliation:
†National Institute for Research in Dairying (University of Reading), Shinfield, Reading RG2 9 AT, UK
Alicja Zechalko
Affiliation:
†National Institute for Research in Dairying (University of Reading), Shinfield, Reading RG2 9 AT, UK
John D. Edwards-Webb
Affiliation:
†National Institute for Research in Dairying (University of Reading), Shinfield, Reading RG2 9 AT, UK
Patricia A. Jackson
Affiliation:
Laboratory of the Government Chemist, Department of Industry, Stamford Street, London SE1 9NQ, UK
David Scuffam
Affiliation:
Laboratory of the Government Chemist, Department of Industry, Stamford Street, London SE1 9NQ, UK

Summary

A survey was undertaken to update and extend available information on the vitamin content of pasteurized milk as produced at processing dairies in mainland UK and to investigate regional, seasonal and breed effects. The concentration of total retinol in milk from non-Channel Island (NCI) breeds averaged 61·9 βg/100g in summer and 41·2 βg/100g in winter. Concentrations of β-carotene were 31·5 and 10·5 βg/100g in summer and winter respectively. Concentrations of retinol in milk from Channel Island (CI) breeds were similar, but concentrations of β-carotene were on average 3 times higher. The concentration of vitamin D3 in milk from NCI breeds was 0·033 βg/100g in summer and 0·026 βg/100g in winter. There was no marked seasonal variation in the mean concentration of total vitamin C (14·5 βg/ml). Values for the concentration of B vitamins (βg/ml) were: folic acid 0·060, vitamin B12 0·0042, riboflavin 1·78, nicotinic acid 0·71, pantothenic acid 3·60, biotin 0·020, thiamin 0·46 and vitamin B6 0·61. Seasonal variation in the concentration was most marked for folic acid (c.v. 17·4%) and to a lesser extent for vitamin B12 (c.v. 10·3%). The only breed differences in the B vitamin content were for riboflavin and folic acid, the mean values obtained for milk from CI breeds being respectively 20 and 10 % higher than those from NCI breeds.

Type
Original Articles
Copyright
Copyright © Proprietors of Journal of Dairy Research 1984

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