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American Journal of Clinical Nutrition, Vol 41, 760-764, Copyright © 1985 by The American Society for Clinical Nutrition, Inc

ORIGINAL RESEARCH COMMUNICATIONS

The relations between vitamin D2 and D3 in the diet and plasma 25OHD2 and 25OHD3 in elderly women in Great Britain

HM Newton, M Sheltawy, AW Hay and B Morgan

Vitamin D2 and D3 intake and plasma 25OHD2 and 25OHD3 were measured in 70 elderly women; 13 living at home and 57 long-stay patients with no access to sunlight. Vitamin D2 intake and plasma 25OHD2 were correlated in the whole group (p less than .005) and vitamin D3 intake and plasma 25OHD3 and total D intake and total 25OHD were significantly correlated (p less than .005) in the patients. In the whole group the plasma 25OHD2 increased by 4.5 nmol/l for every 1 microgram increase in vitamin D2 intake. This was also the increase observed in a longitudinal study of vitamin D2 supplements in 11 patients. Vitamin D intake is a significant determinant of plasma 25OHD and the relation between them suggests that stores of vitamin D can be maintained at 20 nmol/l in the elderly by a daily intake of 4 micrograms of vitamin D, even in the absence of sunlight.




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Copyright © 1985 by The American Society for Nutrition