Study Finds Multivitamin/Mineral Supplements Are Safe for Long Term Consumption
Recent studies have suggested that taking a multivitamin/mineral that provides 100% of the Recommended Dietary Allowance could result in overdosing on certain micronutrients.
The researchers examined 15 studies that evaluated the use of multivitamin/mineral supplements containing at least nine vitamins and three minerals at a maximum concentration of 100% Recommended Dietary Allowance. Nine of the studies involved pregnant women and healthy adults. The other six involved mature adults and directly addressed adverse side effects.
Only minor negative symptoms, such as unidentified gastrointestinal issues, were reported in all 15 studies. The researchers concluded that taking multivitamin/mineral supplements that provide 100% of the RDA of the vitamins and minerals contained does not cause excessive intake of the nutrients and does not increase mortality.
This is particularly important for Americans, who for the most part are not meeting RDAs for many important nutrients. NHANES data found that 74% of Americans aren’t getting enough vitamin D; 67% aren’t getting enough vitamin E; 46% aren’t getting enough magnesium; 39% aren’t getting enough calcium; 35% aren’t getting enough vitamin A; and 31% aren’t getting enough vitamin C.
Researchers from the University of Hohenheim conducted the study. It was published online ahead of print on March 4, 2016, in the journal Nutrition.
Multivitamin-mineral supplements contain minerals such as calcium, magnesium, zinc, phosphorous, manganese and copper. They may also contain iron, selenium, iodine, chromium or molybdenum. Previous studies have shown that multivitamins/minerals may aid in weight loss, reduce the risk of cardiovascular disease, and boost general physical health. Other studies have also shown that the cells of people who routinely take multivitamins have a younger biological age.