Oxalate: Effect on calcium absorbability

Journal Article · Sun Oct 01 00:00:00 EDT 1989 · American Journal of Clinical Nutrition; (USA)

OSTI ID:5227439

Heaney, R P; Weaver, C M ^[1]

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1. Creighton Univ., Omaha, NE (USA)

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 ingested 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.

• OSTI ID: 5227439
• Journal Information: American Journal of Clinical Nutrition; (USA), Vol. 50:4; ISSN 0002-9165
• Country of Publication: United States
• Language: English

Related Subjects

59 BASIC BIOLOGICAL SCIENCES
CALCIUM
INTESTINAL ABSORPTION
ABSORPTION SPECTRA
BIOLOGICAL AVAILABILITY
MAN
MILK
OXALATES
SCINTILLATION COUNTING
SPECTROPHOTOMETRY
TRACER TECHNIQUES
ABSORPTION
ALKALINE EARTH METALS
ANIMALS
BIOLOGICAL MATERIALS
BODY FLUIDS
CARBOXYLIC ACID SALTS
COUNTING TECHNIQUES
ELEMENTS
FOOD
ISOTOPE APPLICATIONS
MAMMALS
MATERIALS
METALS
PRIMATES
SPECTRA
UPTAKE
VERTEBRATES
550501* - Metabolism- Tracer Techniques