Marine Magnesium Shows Superior Absorption Over Traditional Supplements

Magnesium deficiency affects 15-20% of people in developed countries, contributing to diabetes, heart problems, and bone health issues. Since magnesium bioavailability varies dramatically between supplement forms, researchers investigated which sources provide optimal absorption using advanced cellular models.

The study compared four magnesium sources: Aquamin Mg Soluble (seawater-derived), magnesium oxide, and two forms of magnesium bisglycinate. Using the standardized INFOGEST digestion model followed by Caco-2 intestinal cell transport studies, researchers measured how much magnesium crossed the cellular barrier under realistic digestive conditions.

When digested with food, Aquamin Mg Soluble demonstrated significantly superior bioavailability compared to analytical-grade magnesium bisglycinate. The marine source also uniquely downregulated TRPM6 gene expression, a magnesium transport channel that typically increases when cells need more magnesium. This downregulation suggests the cells were receiving adequate magnesium, indicating efficient absorption.

The seawater-derived supplement contains 72 trace minerals alongside magnesium, which may enhance its bioavailability through synergistic effects. Interestingly, without food present during digestion, differences between supplements were less pronounced, highlighting the importance of taking magnesium with meals.

These findings suggest that magnesium source matters significantly for absorption. The study's use of physiologically relevant digestion conditions makes results more applicable to real-world supplementation than previous research using undigested supplements.