Effect of protein level and protein source on zinc absorption in humans

Journal Article · Sun Jan 01 04:00:00 EST 1989 · J. Nutr.; (United States)

OSTI ID:6459269

Sandstroem, B A; Almgren, A; Kivistoe, B C; Cederblad, A

The effect of increasing levels of various protein sources on zinc absorption from a legume-based meal was studied in humans with the use of a radionuclide technique. The meals were extrinsically labelled with 65Zn and absorption was determined from measurements of the whole-body retention of the isotope. The mean fractional zinc absorption for the 13 meals was 24.7 +/- 6.9% and was only influenced by the protein content of the meal to a limited extent (r = 0.45). However, the amount of zinc absorbed from the meals was strongly correlated with both the protein (r = 0.85) and zinc content (r = 0.86): 5.9 +/- 1.7 mumol of zinc was absorbed from the basal bean meal which had the lowest protein content; the addition of low zinc chicken doubled the protein content and increased zinc absorption to 10.3 +/- 2.0 mumol; the addition of zinc-rich beef also doubled the protein content, however, zinc absorption was increased to 15.9 +/- 4.7 mumol. It is concluded that the zinc content of the main protein source of the diet determines the amount of zinc absorbed to a large extent. However, relatively small amounts of animal protein can significantly improve the value of a legume-based meal as a source of zinc.

• Research Organization: Univ. of Gothenburg (Sweden)
• OSTI ID: 6459269
• Journal Information: J. Nutr.; (United States), Journal Name: J. Nutr.; (United States) Vol. 119:1; ISSN JONUA
• Country of Publication: United States
• Language: English

Related Subjects

550501 -- Metabolism-- Tracer Techniques
560300* -- Chemicals Metabolism & Toxicology
59 BASIC BIOLOGICAL SCIENCES
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
ABSORPTION
BIOLOGICAL EFFECTS
COUNTING TECHNIQUES
ELEMENTS
ESTERS
FOOD
INTESTINAL ABSORPTION
ISOTOPE APPLICATIONS
MEAT
METABOLISM
METALS
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC PHOSPHORUS COMPOUNDS
PHOSPHORIC ACID ESTERS
PHYTIC ACID
PROTEINS
TRACER TECHNIQUES
UPTAKE
WHOLE-BODY COUNTING
ZINC