by treatment group and study day
Water with magnesium added
Water devoid of calcium and magnesium
There was a statistically significant increase in the mean level of serum magnesium between the beginning of the clinical trial and the end of the clinical trial 12 weeks later (0.0002 mmol/L/day; p < 0.0148). This significant increase in serum magnesium occurred even though many waters consumed were devoid of magnesium.
After 12 weeks, the difference in serum magnesium concentrations between drinking water devoid of magnesium and drinking water with added magnesium was significant (p = 0.027). That is, water with added magnesium was found to be a source of systemically available magnesium that significantly increased serum magnesium concentrations above the increase caused by improved hydration per se.
When data from all time points were analyzed using a repeated measures analysis of variance there was a statistically significant difference in serum magnesium between consumption of water with added magnesium and consumption of water devoid of magnesium (p = 0.015). Additional statistics for analyses of change showed that the mean level of serum magnesium across days 14, 42 and 84 was higher, after adjusting for baseline levels, when water was consumed that contained magnesium (p = 0.0070).
Even though many waters consumed were devoid of magnesium, there were statistically significant correlations between the change in serum magnesium and the change in several serum biomarkers across days 14, 42 and 84. In particular, the correlation between the change in serum magnesium and the change in serum albumin was consistent and positive and statistically significant (p < 0.05). In waters devoid of magnesium there was a statistically significant correlation between the change in serum parathyroid hormone concentration and the change in systolic blood pressure (p < 0.05). Serum parathyroid hormone concentrations increased and systolic blood pressure increased.
Many diseases have been associated with low magnesium status or low serum magnesium concentrations. These diseases are main causes of morbidity and mortality in Western societies and include Type 2 diabetes, hypertension, atherosclerosis, coronary heart disease, heart attack, stroke, the metabolic syndrome, osteoporosis and osteoarthritis. Low magnesium status has also been associated with the development of cancer.
It is known that the intake of bioavailable magnesium decreases inflammatory biomarker
production (that is, decreases inflammatory cytokine production). It is considered
that this magnesium mediated decrease in cytokine production may be responsible for
the multiple health benefits claimed for magnesium. For an excellent insight into
how magnesium decreases cytokine production within cells see the USA National Institutes
of Health (NIH) peer-
Magnesium has been identified also as an essential second messenger and regulator of signaling in human immune system T cells. Activation of T cells requires a rapid magnesium influx. Immune system T cells are involved in a range of immunological processes including activation of macrophages and the destruction of virally infected cells and tumor cells. For an excellent article on magnesium and T cell activiation see the publication in Nature from the research group at the National Institutes of Health, Bethesda, Maryland, USA. See Signaling role for Mg2+ revealed by immunodeficiency due to loss of MagT1.
The prestigious USA National Institutes of Health (NIH) states that drinking water can be a source of magnesium and that there is an increased interest in the role of magnesium consumption in preventing and managing hypertension, cardiovascular disease, osteoporosis, diabetes and migraine headache.
A major review of epidemiological studies on drinking water concluded that a low intake of magnesium in drinking water increased the risk of dying from, and possibly developing, both cardiovascular disease and stroke.
Following a meta-
A large case control study (17,133 and 17,133 controls) found a significant protective effect of moderate to high magnesium concentrations in drinking water on the risk of death from cerebrovascular disease (stroke).
It is to be noted that intracellular magnesium concentrations increase with increasing
extracellular (serum) magnesium concentrations in a dose-
It is interesting also that optimal hydration produces a consistent and significant
correlation between an increase in serum magnesium concentrations and an increase
in serum albumin concentrations. Numerous international peer-
Relations of dietary magnesium intake to biomarkers of inflammation and endothelial dysfunction in an ethnically diverse cohort of postmenopausal women.
Magnesium intake in relation to systemic inflammation, insulin resistance, and the incidence of diabetes.
Magnesium intake, C-
Magnesium and C-