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Evolution of Mg deficiency in rats
A Lerma1, E Planells, P Aranda
1Departamento de Fisiología, Facultad de Farmacia, Universidad de Granada, España.
Annals of Nutrition & Metabolism
|January 1, 1993
Summary
Magnesium deficiency in rats significantly impacts body weight and blood magnesium levels within 7 days. Digestive absorption increases, but overall magnesium balance decreases over 70 days.
Area of Science:
- Nutritional Biochemistry
- Mineral Metabolism
Background:
- Magnesium (Mg) is an essential mineral crucial for numerous physiological processes.
- Understanding Mg bioavailability and deficiency effects is vital for human and animal health.
Purpose of the Study:
- To investigate the temporal effects of a magnesium-deficient diet on Mg bioavailability in adult rats.
- To identify key physiological parameters sensitive to Mg deficiency over a 70-day period.
Main Methods:
- Weekly analysis of Mg cation bioavailability over 70 days.
- Rats were fed a diet containing 0.02% Mg.
- Measurements included digestive utilization, Mg balance, body weight, and Mg concentrations in blood, plasma, muscle, bone, kidney, and brain.
Main Results:
- Increased digestive utilization and decreased Mg balance were observed.
- Body weight and blood Mg concentration declined significantly within 7 days.
- Plasma and muscle Mg decreased after 35 days; bone Mg decreased after 49 days; renal Mg tended to increase; brain Mg remained unchanged.
Conclusions:
- Early indicators of Mg deficiency include reduced body weight and blood Mg levels.
- Bone and muscle tissues are affected later in the deficiency period.
- The study highlights the dynamic physiological response to chronic Mg deficiency.