Risk of excessive iodine intake with certain algae products - Algae-based foods may contain dangerously high iodine levels, study warns

A new study has raised concerns about iodine levels in algae-based foods. Researchers found that eight out of 13 tested products contained dangerously high amounts of the mineral. Yet none provided all the necessary warnings or clear usage instructions for consumers. The investigation, commissioned by Germany's consumer protection agencies, analysed 13 algae-containing foods. Iodine levels varied widely, from as low as 11 micrograms to a staggering 8,720 micrograms per 100 grams. Five algae species were examined: Diatomeen, Arthrospira (commonly known as Spirulina), Tetraselmis, Nannochloropsis, and Chromochloris zofingiensis.

The German Federal Institute for Risk Assessment warns that high-iodine products should carry clear labels. These should include potential risks, such as thyroid disruption from overconsumption. The German Nutrition Society advises a daily iodine intake of 150 micrograms for adolescents and adults, while anything above 600 micrograms is considered unsafe. Despite these risks, many algae products fail to list iodine content, recommended serving sizes, or necessary warnings. Consumer advocates are now pushing for legally binding rules on labelling. They want mandatory maximum intake limits and full transparency on packaging.

The study highlights a significant gap in consumer protection for algae-based products. Without proper labelling, people risk unknowingly exceeding safe iodine levels. Authorities are now under pressure to enforce stricter regulations on these foods.