Effect and safety of salt iodization to prevent iodine deficiency disorders: a systematic review with meta-analyses
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Systematic evidence shows that excess iodine can increase thyroid risk in susceptible populations, supporting monitoring and dose control rather than a blanket claim that iodized salt is inherently toxic.
Challenges
WHO guidance and evidence syntheses support salt iodization as an effective strategy for preventing iodine-deficiency disorders when population exposure is appropriately calibrated.