Level of lead and cadmium in infant formulae

Area of Science:

• Environmental Chemistry
• Food Safety
• Toxicology

Background:

• Infant formula and cow's milk are staple foods for infants and young children.
• Exposure to heavy metals like lead (Pb) and cadmium (Cd) can pose health risks.
• Monitoring metal concentrations in these products is crucial for public health.

Purpose of the Study:

• To quantify lead (Pb) and cadmium (Cd) levels in infant formula and cow's milk.
• To assess the Estimated Weekly Intake (EWI) of these metals for infants of different ages.
• To compare the estimated intake with established Provisional Tolerable Weekly Intake (PTWI) guidelines.

Main Methods:

• Samples of infant formula (n=11) and cow's milk (n=16) were collected.
• Heavy metals were extracted using trichloroacetic acid.
• Concentrations were determined using atomic absorption spectroscopy.

Main Results:

• Mean Pb levels were 0.1563 µg/ml in infant formula and 0.1431 µg/ml in cow's milk.
• Mean Cd levels were 0.0012 µg/ml in infant formula and 0.0018 µg/ml in cow's milk.
• EWIs for Pb and Cd from both sources were below PTWI, but some infant formulas approached the Pb PTWI for infants.

Conclusions:

• Both infant formula and cow's milk contained lead and cadmium below established safety limits.
• Estimated weekly intake of lead from certain infant formulas was high relative to body weight, nearing the PTWI.
• Continued monitoring of heavy metal content in infant nutrition is recommended.