Prenatal vitamins often lack key nutrients, may be contaminated with heavy metals

December 5, 2024

Study design: In this observational study, researchers analyzed 47 prenatal multivitamins and minerals, including 32 nonprescription and 15 prescription products, purchased from various online and local retailers. The products were analyzed for actual amounts of choline and iodine and tested for contaminants such as arsenic, lead, and cadmium.

Results: Many prenatal vitamins didn't contain the advertised amounts of key nutrients. Only 26% of products listed choline content, and of those, only 42% had the correct amount. For iodine, 53% of products listed its content, but only 16% contained the claimed amount. Additionally, several products exceeded safety limits for heavy metals: seven had too much arsenic, two had too much lead, and 13 had too much cadmium.

Impact on clinical practice: Physicians should be aware of the potential discrepancies in nutrient content and the presence of contaminants in prenatal vitamins. Enhanced regulatory oversight is needed to ensure the safety and efficacy of prenatal supplements.

Source:

Borgelt LM, et al. (2024, November 18). Am J Clin Nutr. Content of Selected Nutrients and Potential Contaminants in Prenatal Multivitamins and Minerals: an Observational Study. https://pubmed.ncbi.nlm.nih.gov/39566682/