Algae-based fish alternatives: Adequate iodine supply examined
In a recent market check, consumer reports examined six seaweed-containing products serving as fish and seafood substitutes. The findings reveal varying iodine levels, with some products containing more iodine than the recommended daily intake for consumers energy.
Seaweed, a natural source of iodine, is increasingly used in the production of plant-based fish alternatives. The iodine content in these products depends on the type and amount of seaweed used, as well as natural fluctuations.
Typical serving sizes of some seaweed-based products can lead to high iodine intake without consumers being able to recognise it. This is more than the recommended daily intake for iodine, which stands at 600 micrograms, from all sources combined.
The product with the highest iodine content was a plant-based tuna alternative in a can, providing around 316 micrograms of iodine per 140 grams. Three of the tested products were classified as iodine-rich, containing more than 45 micrograms of iodine per 100 grams.
Interestingly, canned tuna contains significantly less iodine compared to the plant-based tuna alternative. One product contained no notable amounts of iodine, while the iodine content in the other five products ranged from 29 to 226 micrograms per 100 grams.
However, labeling of iodine content is only required if manufacturers promote their products as "iodine-rich" or "iodine source," or if the content exceeds 2,000 micrograms per 100 grams of dry matter. None of the tested products had labeling for iodine content.
Consumer advocates warn that it may not be clear to all consumers that individual vegan substitute products can contain high amounts of iodine. They recommend that people with thyroid disease ask the manufacturer about the iodine content of the content marketing product before consuming it.
A varied diet remains the best basis for adequate iodine supply. Plant-based fish substitutes can have a place in a varied diet, but consumers should be aware that individual vegan substitute products can contain high amounts of iodine.
High iodine levels over time can potentially impair thyroid function. It is crucial for consumers to be informed about the iodine content in the products they consume, especially those that claim to be rich in iodine.
