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Am J Clin Nutr. 1984 Nov;40(5):1007-10.

Absorption kinetics of oxalate from oxalate-rich food in man.

Abstract

The absorption of oxalate was investigated in a healthy subject after ingestion of oxalate-rich meals (spinach and rhubarb) with and without addition of 14C-labeled oxalic acid and calcium oxalate, and after oxalate-free meals with addition of nonlabeled sodium oxalate and calcium oxalate. Under these conditions, calcium oxalate was absorbed to the same extent as soluble oxalate; only a small percentage (2.4 +/- 0.7) of the total oxalate load was absorbed. Significant oxalate absorption occurred within 1 to 8 h after ingestion. The results suggest that under normal conditions the proximal part of the small bowel is a major absorption site.

PMID:
6496379
DOI:
10.1093/ajcn/40.5.1007
[Indexed for MEDLINE]

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