Shanxi Province: 8-10 year old children have more than adequate/excessive iodine intake

[wendy]

Shanxi Province was historically an iodine-deficiency area. Following mandatory salt iodization in the mid-1990s, iodine status in many parts of Shanxi shifted into the more-than-adequate or excessive range.

A Shanxi-wide 2009 survey in areas without high-iodine water supplies found the median urinary iodine of 8-10 year-old children was 244.0 μg/L [more-than-adequate], with 35.5% ≥300 μg/L [excessive]. At county level, 21% of Shanxi counties had median child urinary iodine ≥300 μg/L. The conclusion was that Shanxi residents' iodine nutrition was "more than appropriate" and that salt iodine concentration needed reduction (Wang et al., 2012).

In Shanxi, there are also documented areas with high-iodine water supplies. The 2019 government survey announced 298 administrative villages in 47 townships, towns, sub-districts, and development zones across 12 counties, cities, and districts in the province as water-source high-iodine areas (Shanxi Provincial Health Commission, 2019). In those areas, all children and all pregnant women were found to have excess iodine intake (Wu et al., 2023).

REFERENCES

Shanxi Provincial Health Commission - "Announcement from the Shanxi Provincial Health Commission regarding the scope of areas with high iodine levels in water sources in Shanxi Province" Shanxi Provincial Health Commission, January 8, 2019

Wang YP, Zhang XD, Guo BS, Xie P, Jia QZ, Ren YT - "Analyse of iodine nutritional status of residents in Shanxi province in 2009" Chinese Journal of Endemiology 31(3):305-307 (2012)
https://doi.org/10.3760/cma.j.issn.1000 ... 012.03.019

Wu Z, Zhang X, Guo B, Li H, Ji J, Wu M - "Analysis of monitoring results in water-borne high iodine areas in Shanxi Province in 2020" Chinese Journal of Endemiology 42(12):947-950 (2023)
https://pesquisa.bvsalud.org/portal/res ... pr-1023958
"Efforts should be made to increase the popularization of non iodized salt and improve water quality to reduce iodine in areas with high iodine levels, in order to control the harm of high iodine in water sources as soon as possible."