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. 1973 Mar;52(3):584–591. doi: 10.1172/JCI107219

Effect of Alcohol on Serum Folate Level

Edward R Eichner 1,2, Robert S Hillman 1,2
PMCID: PMC302296  PMID: 4630980

Abstract

Alcohol was given orally and intravenously to normal and chronic alcoholic volunteers to study its effect on folate metabolism. Oral alcohol, given to nine subjects on a low folate diet, caused a greater fall in serum Lactobacillus casei folate levels than that seen in eight subjects on a low folate diet alone. This alcohol-induced fall in serum folate level occurred largely during the 1st day of the protocol. Although brief infusions of intravenous ethanol had no effect on serum folate level, a 13 h infusion caused a striking fall in serum folate level between the 8th and 10th h. When ethanol was stopped, the serum folate level returned rapidly to normal. Two chronic alcoholic subjects with different basal levels of serum folate were studied for several weeks on a low folate diet plus alcohol. The serum folate level fell promptly in each subject, rose when alcohol was temporarily stopped, and fell when alcohol was resumed. Folate-deficient megaloblastic anemia developed in 3 wk in the subject with initially marginal serum folate levels, but failed to develop in almost 7 wk in the subject with normal folate stores, as reflected by initially high serum folate levels. Thus, the alcohol-induced fall in serum folate level was apparently not a result of depletion of folate stores. In vitro experiments ruled out an assay artifact as an explanation for the alcohol-induced fall in serum L. casei folate level. It seems likely that alcohol interferes with the delivery of n-5-methyltetrahydrofolic acid from storage areas.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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