Chiang Mai Journal of Science

This work assessed the activity concentrations of ²²⁶Ra, ²³²Th, ⁴⁰K, and ¹³⁷Cs, their corresponding annual effective doses, and their radiological health risks associated with the consumption of infant formulas in Thailand. The results showed that the average (± standard deviation) activity concentrations of ²²⁶Ra, ²³²Th, ⁴⁰K, and ¹³⁷Cs radionuclides were 3.20±0.51 Bq kg^-1, 1.24±0.10 Bq kg^-1, 213.20±25.50 Bq kg^-1, and 4.90±0.74 Bq kg^-1, respectively, leading to an average annual effective dose for infants aged ≤1 year and 1­­­–2 years of 762.82±91.34 µSv year^-1 and 189.60±22.47 µSv year^-1, respectively, and radiological health risks of (5.63±0.66)×10^-6 and (3.77±0.44)×10^-6, respectively. The overall results suggested that infant formulas in Thailand posed no significant effective dose and radiological health risks, implying safe consumption for infants.