Background: Magnesium imbalance, implicated in diabetes mellitus both as a
cause and a consequence, has not yet been investigated in subgroups of subj
ects with malnutrition-related diabetes mellitus, which is prevalent in you
ng patients in tropical developing countries such as Bangladesh.
Objective: The present study evaluated the serum and urinary magnesium conc
entrations in groups of young diabetic subjects in Bangladesh.
Design: Forty patients newly diagnosed with diabetes [13 with fibrocalculus
pancreatic diabetes (FCPD), 13 with protein-deficient diabetes (PDDM), and
14 with type 2 diabetes mellitus] were studied alone with 13 healthy contr
ol and 13 malnourished control subjects [body mass index (in kg/m(2)) <19].
Magnesium was measured by atomic absorption spectrophotometry.
Results: Malnutrition itself was not related to the serum glucose (fasting:
3.68 +/- 0.74 and 4.11 +/- 0.29 mmol/L; postprandial: 6.30 +/- 0.41 and 6.
00 +/- 0.24 mmol/L for healthy and malnourished control subjects, respectiv
ely) or serum or urinary magnesium (serum: 0.73 +/- 0.03 and 0.75 +/- 0.05
mmol/L; urinary: 232 +/- 124 and 243 +/- 88 mmol Mg/mol creatinine for heal
thy and malnourished control subjects, respectively) concentration. Subject
s with FCPD and PDDM had significantly lower serum magnesium concentrations
(PDDM: 0.68 +/- 0.06 mmol/L, FCPD: 0.66 +/- 0.07 mmol/L) than those in bot
h control groups. In contrast with 0% of healthy and 7.7% of malnourished c
ontrol subjects, 42.85% of type 2 diabetic subjects, 61.54% of those with P
DDM. and 69.23% of those with FCPD were hypomagnesemic, Subjects with FCPD
and PDDM had significantly higher urinary excretion of magnesium than the h
ealthy and malnourished control subjects and the type 2 diabetic subjects.
Hypermagnesuria paralleled hypomagnesemia.
Conclusions: Malnutrition may not itself give rise to glucose intolerance,
and serum magnesium deficiency seems to be a consequence rather than a caus
e of diabetes mellitus.