Mineral supplementation benefits and risks
Pro Research Analysisby 
Searched over 200M research papers
Overview of Mineral Supplementation: Benefits and Risks
Mineral supplementation is widely used with the aim of improving health and preventing chronic diseases. However, the evidence for its benefits and risks is mixed and often depends on individual health status, dietary intake, and the specific mineral in question.
Benefits of Mineral Supplementation
Cancer and Cardiovascular Disease Prevention
Most studies show that mineral supplementation, including multivitamins, provides little or no benefit in preventing cancer, cardiovascular disease, or reducing mortality in healthy adults with no known deficiencies. There is a small reduction in cancer incidence with multivitamin use, but the effect is modest and the evidence is limited, especially for women and for cardiovascular outcomes O’Connor2022Fortmann2013Kim2018+1 MORE. Some studies in populations with poor nutrition have shown a reduction in certain cancer types and cerebrovascular disease deaths, particularly in men, but these findings may not apply to well-nourished populations 7Mark1996.
Bone Health
Calcium supplementation can help prevent bone mineral density loss in postmenopausal women and may reduce vertebral fractures, especially in those with low dietary calcium or vitamin D deficiency. However, the benefit for preventing hip fractures or total fractures is small or unproven in most healthy adults Reid20157Shin2015.
Trace Minerals and Cardiovascular Health
Trace minerals like iron, zinc, copper, and selenium are essential for cardiovascular function. Deficiency in these minerals can cause cardiovascular problems, but both low and high levels may increase risk, suggesting a J- or U-shaped relationship. The benefits of supplementation are most clear in those with deficiencies, while excess intake may be harmful .
Risks and Harms of Mineral Supplementation
Increased Risk of Disease
Some supplements, such as beta carotene (especially in smokers), are associated with an increased risk of lung cancer and cardiovascular mortality O’Connor2022Fortmann20137. High doses of vitamin A, vitamin E, and calcium have also been linked to increased risks of hip fracture, hemorrhagic stroke, kidney stones, and myocardial infarction O’Connor2022Reid20157.
Adverse Effects and Overdose
Supplements can cause gastrointestinal side effects, increase the risk of kidney stones, and may interact with other medications. Overdose is possible, especially when multiple products containing the same mineral are used. Adverse reactions, drug interactions, and increased medication burden are important considerations Reid2015Moses2021.
Population-Specific Considerations
The risk-benefit profile of mineral supplementation varies by population. Those with low dietary intake or specific deficiencies may benefit more, while those with adequate intake may experience more harm than benefit. The effects can also differ by age, gender, and underlying health conditions Shin2015Che2022.
Conclusion
For most healthy adults with no known deficiencies, mineral supplementation offers little benefit in preventing chronic diseases and may carry risks, especially when taken in high doses or without medical guidance. Supplementation may be beneficial for individuals with poor nutrition or specific deficiencies, but routine use in the general population is not supported by current evidence. It is important to consider individual dietary needs, potential harms, and consult healthcare professionals before starting mineral supplements O’Connor2022Reid2015Fortmann2013+7 MORE.
Sources and full results
Most relevant research papers on this topic