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American Journal of Clinical Nutrition, Vol 27, 712-718, Copyright © 1974 by The American Society for Clinical Nutrition, Inc.

Hematological, vitamin B12, and folate studies on Seventh-day Adventist vegetarians

Bruce K. Armstrong M.B., B.S., M.R.A.C.P.1, Richard E. Davis M.Sc. F.I.M.L.T.1, Darryl J. Nicol F.A.I.M.L.T.1, Anthony J. van Merwyk M.B., B.S., F.R.A.C.S.1, and Carol J. Larwood Dip. Diet.1

1 From the Departments of Haematology and Diet Therapy and the University Departments of Medicine and Surgery, Royal Perth Hospital, Perth 6,000, Western Australia

Hematological, vitamin B12, and folate levels were measured in 562 members of the Seventh-day Adventist Church, of whom 431 were vegetarians. Vegetarians had a significantly higher mean serum folate than did non-vegetarians. Serum vitamin B12 levels correlated directly with both meat and egg intake. Subjects with a serum vitamin B12 level of < 160 pg/ml had significantly higher mean MCV and MCH and lower mean total red and white cell counts and red cell folate than the rest of the group. Comparison of the vegetarians with the Busselton population showed similar differences. The prevalence of low hemoglobin levels was not significantly different from that in the Busselton population, and there was no evidence of an excess of iron or folate deficiency among the Seventh-day Adventists. Only one volunteer was found to have suffered from symptomatic dietary vitamin B12 deficiency. A significant positive correlation among MCV, MCH, and age in men was found, apparently due to an increased sensitivity to vitamin B12 deficiency in older men. Young women also appeared more sensitive to the effects of vitamin B12 deficiency.




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