Dietary minerals in food
Pro Research Analysisby 
Searched over 200M research papers
Essential Dietary Minerals in Food: Types and Functions
Dietary minerals are crucial nutrients found in food that support many body functions, including bone health, enzyme activity, nerve signaling, and immune response. Key minerals include calcium, magnesium, iron, zinc, selenium, copper, iodine, potassium, and phosphate. These minerals are needed in varying amounts, with some (like calcium and magnesium) required in larger quantities (macrominerals), and others (like iron, zinc, selenium, and copper) needed in trace amounts (trace minerals) 379.
Common Dietary Sources of Minerals
Minerals are present in a wide variety of foods. Dairy products, leafy greens, and fortified foods are major sources of calcium. Whole grains, nuts, seeds, and legumes provide magnesium and zinc. Red meat, beans, and fortified cereals are important for iron. Seafood and iodized salt supply iodine, while selenium is found in nuts and seafood. The mineral content of food can be influenced by soil quality, food processing, and preparation methods 91.
Prevalence of Mineral Deficiencies and Excesses
Many populations worldwide do not meet recommended intakes for several minerals. For example, calcium, zinc, selenium, and iodine deficiencies are common in certain regions, with calcium deficiency affecting over half the population in some African countries. Iron deficiency risk varies depending on diet composition and bioavailability, especially in diets high in phytate and low in animal protein 15. Even in developed countries, a significant portion of people do not meet recommendations for calcium, magnesium, and potassium 58.
On the other hand, excessive intake of minerals, often due to overuse of supplements, can also be harmful. Too much calcium can cause kidney stones and heart problems, while excess iron can damage organs 78.
Factors Affecting Mineral Bioavailability
The body’s ability to absorb and use minerals (bioavailability) depends on several factors. The presence of phytates in plant foods can reduce absorption of minerals like iron and zinc. Food processing, cooking methods, and the chemical form of the mineral also play a role. The gut microbiome can influence mineral bioavailability, with certain bacteria and probiotics improving the absorption of iron, calcium, selenium, and zinc 210.
Dietary Patterns, Supplement Use, and Mineral Status
Dietary patterns impact mineral intake and status. Studies show that both traditional and modern diets can lead to inadequate intake of certain minerals, such as zinc and selenium, even in well-nourished populations. Long-term dietary interventions can change blood levels of minerals, but some minerals (like calcium and iron) may remain unchanged despite dietary changes 45.
People who use mineral-containing dietary supplements often have higher mineral intakes from food as well, but supplements can help reduce the risk of deficiencies. However, supplement use can also increase the risk of exceeding safe intake levels for minerals like calcium, iron, zinc, and magnesium .
Health Implications of Mineral Deficiency and Excess
Deficiencies in minerals can lead to serious health problems. Calcium and magnesium deficiencies can cause bone loss and neuromuscular issues, while iron and zinc deficiencies can result in anemia, poor immune function, and delayed wound healing. Selenium deficiency impairs antioxidant defenses. Conversely, excessive intake of minerals can cause toxicity and organ damage 76.
Strategies to Improve Mineral Intake
Improving mineral intake can be achieved through dietary diversification, food fortification, and agricultural interventions such as biofortification. Public health campaigns and education about the importance of minerals and their food sources are also important. In some cases, targeted supplementation may be necessary, but monitoring is needed to avoid excessive intake 19.
Conclusion
Dietary minerals are essential for health, but both deficiencies and excesses are common worldwide. A balanced diet rich in diverse, minimally processed foods is the best way to ensure adequate mineral intake. Awareness, public health strategies, and careful use of supplements can help address both deficiencies and the risks of overconsumption, supporting overall well-being.
Sources and full results
Most relevant research papers on this topic
Dietary mineral supplies in Africa
Africans face high risks of dietary micronutrient deficiencies, with the highest risk for calcium (54%), followed by Zn (40%), Se (28%) and I (19%), with potential for reduction through fertilization and breeding strategies.
Global diversity of dietary intakes and standards for zinc, iron, and copper.
Dietary standards for zinc, iron, and copper vary globally, with women needing higher levels due to menstrual losses, and factors like bioavailability, food security, and undernutrition affecting requirements.
DOI
Fostering healthy aging through selective nutrition: A long-term comparison of two dietary patterns and their holistic impact on mineral status in middle-aged individuals-A randomized controlled intervention trial in Germany.
Long-term dietary interventions can influence serum mineral concentrations in middle-aged individuals, contributing to healthy aging strategies.
DOI