Oxalate: Effect on calcium absorbability

R. P. Heaney, C. M. Weaver

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Abstract

Absorption of calcium from intrinsically labeled Ca oxalate was measured in 18 normal women and compared with absorption of CA from milk in these same subjects, both when the test substances were investigated in separate meals and when ingested together. Fractional Ca absorption from oxalate averaged 0.100 ± 0.043 when ingested alone and 0.140 ± 0.063 when ingested together with milk. Absorption was, as expected, substantially lower than absorption from milk (0.358 ± 0.113). Nevertheless Ca oxalate absorbability in these women was higher than we had previously found for spinach Ca. When milk and Ca oxalate were ingested together, there was no interference of oxalate in milk Ca absorption and no evidence of tracer exchange between the two labeled Ca species.

Original languageEnglish
Pages (from-to)830-832
Number of pages3
JournalAmerican Journal of Clinical Nutrition
Volume50
Issue number4
Publication statusPublished - 1989

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All Science Journal Classification (ASJC) codes

  • Food Science
  • Medicine (miscellaneous)

Cite this

Heaney, R. P., & Weaver, C. M. (1989). Oxalate: Effect on calcium absorbability. American Journal of Clinical Nutrition, 50(4), 830-832.