Dietary sources of magnesium
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Major Dietary Sources of Magnesium
Magnesium is an essential mineral found in a variety of foods, with plant-based sources being especially important. In a large Korean population study, about 80% of daily magnesium intake came from plant-based foods. The main food groups contributing to magnesium intake were grains (28.3%), vegetables (17.6%), and meats (8.4%). The top individual foods providing magnesium included rice, Korean cabbage (Baechu) kimchi, tofu, pork, and milk. The specific contributions of these foods can vary by age and sex, but grains and vegetables consistently remain the leading sources for most people .
Impact of Food Processing and Environmental Factors on Magnesium Content
The magnesium content in fruits and vegetables has declined over the past fifty years, and about 80% of magnesium is lost during food processing. This reduction is linked to changes in agricultural practices and environmental factors such as global warming, which affect magnesium availability in the soil and, consequently, in the food chain. As a result, many people worldwide do not meet the minimum daily magnesium requirement, even if they consume foods that traditionally were good sources of magnesium .
Marine and Supplemental Sources of Magnesium
Marine-derived sources, such as seawater and seaweed-based supplements, are rich in magnesium and other trace minerals. Products like Aquamin-Mg, sourced from seawater, have shown high solubility and good bioavailability, especially when consumed with food. These supplements are also well-tolerated and can help address mineral deficiencies, particularly in populations at risk of inadequate intake .
Bioavailability of Magnesium from Different Sources
The form in which magnesium is consumed affects how well it is absorbed by the body. Organic forms of magnesium (such as magnesium bisglycinate or picolinate) are generally more bioavailable than inorganic forms (like magnesium oxide). However, all magnesium supplements can help maintain normal magnesium levels in healthy individuals, though older adults or those with existing deficiencies may need to pay closer attention to the form and source of magnesium they consume 64.
Health Benefits of Dietary Magnesium
Higher intake of magnesium from dietary sources is associated with a reduced risk of all-cause and cancer mortality. Each additional 100 mg per day of dietary magnesium can lower the risk of death from all causes and cancer by 6% and 5%, respectively. However, supplemental magnesium does not show the same association with reduced mortality, highlighting the importance of obtaining magnesium from food rather than relying solely on supplements .
Conclusion
Magnesium is primarily obtained from plant-based foods such as grains, vegetables, and legumes, with some contribution from animal products and dairy. The decline in magnesium content due to food processing and environmental changes makes it important to focus on whole, minimally processed foods. Marine-derived supplements and organic forms of magnesium can help address deficiencies, but dietary sources remain the most effective and beneficial way to meet magnesium needs and support overall health 1235+1 MORE.
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