Format

Send to

Choose Destination
Am J Clin Nutr. 1978 Jul;31(7):1198-203.

Absorption of stable isotopes of iron, copper, and zinc during oral contraceptives use.

Abstract

The absorption of iron, copper, and zinc was determined in 22 women 19 to 25 years of age from the difference between intake and fecal output of the stable isotopes 58Fe, 65Cu, and 70Zn, as measured by neutron activation analysis. Of the 22 women, 14 were using oral contraceptive agents, and the other eight were not. Absorption in the group using oral contraceptive agents did not differ significantly from the group not using oral contraceptive agents. The overall iron absorption averaged 14%, copper 57%, and zinc 38%.

PIP:

Absorption of iron, copper, and zinc was determined in 22 women (19-25 years old) from the difference between intake (regulated by testers) and fecal output of the stable isotopes Fe-58, Cu-65, and Zn-70, as measured by neutron activation analysis. Of the 22, 14 were using oral contraceptives (OCs) (1 sequential and the rest combined), and 8 were not. Absorption values did not differ significantly between the OC users and the nonusers. These data suggest that stable isotopes of elements offer promise as a means of measuring mineral absorption without the undesirable aspects of feeding radioactive materials to humans. Disadvantages include difficulty obtaining hardward, expense of radioactive isotopes, and requirement for additional radiochemical separations for zinc, and possibly other minerals.

PMID:
665572
DOI:
10.1093/ajcn/31.7.1198
[Indexed for MEDLINE]

Supplemental Content

Full text links

Icon for Silverchair Information Systems
Loading ...
Support Center