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As part of the review, experts have updated the tolerable daily intake (TDI) for perchlorate from 0.3 to 1.4 micrograms per kilogram of body weight per day. This change reflects the use of a recent model that provides greater precision in evaluating the effects of different doses of perchlorate on individuals. The primary health concern associated with perchlorate is its impact on thyroid function. It can inhibit the uptake of iodine by the thyroid gland, which is crucial for hormone production. In foetuses and infants, thyroid hormones are critical for normal growth and development of the central nervous system.
Experts provisionally concluded that at current levels of exposure there are no health risks for the general population.
The consultation will run for 8 weeks to allow for maximum participation among interested parties. The deadline for sending comments is 11 February 2025.
What is perchlorate and how does it end up in food?
Perchlorate is a contaminant introduced into the environment through agricultural practices, for example through its use in fertilisers. It also results from industrial activities, such as fireworks manufacturing and recycling. When applied on crops, especially leafy greens like spinach and lettuce, perchlorate can accumulate in the plants.
Regulating perchlorate levels in food and water
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