Magnesium kinetics in adolescent girls determined using stable isotopes: effects of high and low calcium intake.
Am J Physiol
; 273(2 Pt 2): R710-5, 1997 Aug.
Article
in En
| MEDLINE
| ID: mdl-9277559
ABSTRACT
Magnesium kinetics were measured in five adolescent girls who were participating in a calcium balance study. Two calcium levels were fed in a randomized crossover design. After an acclimation period, 26Mg was consumed orally and 25Mg was given intravenously, and then blood, urine, and feces were collected for 14 days. Total magnesium and percent enrichment were determined, and data were fitted to a eight-compartment model. There was no significant difference between high and low calcium intakes for any of the parameters examined. Mean values for control (800 mg/day) and high (1,800 mg/day) calcium intake were as follows Mg intake, 305 +/- 30 and 286 +/- 9 mg/day; absorption (percent), 44 +/- 7 and 39 +/- 9; absorption (mg/day), 134 +/- 35 and 110 +/- 28; urinary excretion, 96 +/- 22 and 101 +/- 31 mg/day; fecal excretion, 175 +/- 32 and 200 +/- 11 mg/day; and magnesium balance, 13 +/- 35 and -34 +/- 48 mg/day, respectively. In conclusion, high calcium intake did not alter magnesium kinetics or balance in adolescent girls.
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Collection:
01-internacional
Database:
MEDLINE
Main subject:
Calcium
/
Magnesium
Type of study:
Clinical_trials
/
Prognostic_studies
Limits:
Adolescent
/
Child
/
Female
/
Humans
Language:
En
Journal:
Am J Physiol
Year:
1997
Document type:
Article
Affiliation country: