Lead in women's and children's vitamins

Area of Science:

• Environmental Health
• Toxicology
• Nutritional Science

Background:

• Vitamins are widely consumed by women and children.
• Assessing potential contaminants like lead (Pb) in supplements is crucial for public health.
• Previous data on lead contamination in multivitamins is limited.

Purpose of the Study:

• To quantify lead (Pb) contamination in multivitamin-mineral products marketed to women and children.
• To estimate Pb exposure levels for different demographic groups from supplement consumption.
• To compare estimated Pb exposures with established provisional total tolerable intake levels (PTTI).

Main Methods:

• Analyzed 324 multivitamin-mineral products for Pb content.
• Utilized microwave-assisted nitric acid digestion and inductively coupled plasma mass spectrometry.
• Employed cryogenic grinding for sample homogenization, including soft and gummy formulations.

Main Results:

• Median Pb exposures ranged from 0.123 to 0.845 microg/day across population groups.
• Maximum estimated Pb exposures were below PTTI for all assessed groups (young children, older children, pregnant/lactating women, adult women).
• Overall median Pb exposure was 0.576 microg/day; only five samples indicated potential for exceeding 4 microg/day.

Conclusions:

• Lead contamination in the surveyed multivitamin-mineral products did not pose a significant risk based on PTTI.
• Estimated Pb exposures from these supplements were within safe limits for women and children.
• The study highlights the importance of ongoing monitoring of supplement quality and contaminant levels.