Algae-based fish alternatives as viable alternatives for iodine intake?
In a recent lab test, six plant-based alternatives to tuna, smoked salmon, and caviar were examined to determine their iodine content. The results reveal that these algae-containing vegan fish substitutes can contain relevant amounts of iodine, with some being iodine-rich.
Typically, the iodine content in these products sold in Germany ranges from 50 to 200 micrograms per serving, depending on the type and amount of algae used. For comparison, a 140-gram serving of canned tuna contains significantly less iodine, between 21 and 28 micrograms.
However, it's important to note that consumers cannot easily recognise the iodine content in these algae-containing plant-based fish alternatives due to variations in algae types and amounts, natural fluctuations, and the lack of labelling unless the iodine content is above 2,000 micrograms per 100 grams of dry matter.
The test results showed that five out of six products contained iodine, with three of them being iodine-rich, providing more than 45 micrograms of iodine per 100 grams. The product with the highest iodine content was a plant-based tuna alternative in a can, offering around 316 micrograms of iodine per 140 grams. One product, unfortunately, contained no significant amounts of iodine, with the iodine content being below the detection limit of 10 micrograms per 100 grams.
The lab results highlight the importance of a varied diet for adequate iodine supply, where algae-containing fish substitutes can have a place. However, consumer advocates recommend a cautious approach to consuming these products, especially for people with thyroid disease. High iodine levels can be critical for thyroid function if too much iodine is consumed over time, such as from daily consumption of an affected tuna alternative.
It's essential to remember that consuming typical serving sizes of these products can lead to high iodine intake without being recognizable. Additionally, the iodine content of these products cannot be deduced from the ingredients list alone.
People with thyroid disease are advised to ask the manufacturer about the iodine content of the product before consumption. For all consumers, it's crucial to be aware that individual vegan substitutes can also contain high amounts of iodine, and it's not always clear to all consumers.
The recommended maximum daily intake of iodine is 600 micrograms from all sources combined. While these plant-based fish substitutes can provide a significant portion of your daily iodine intake, it's important to consume them in moderation and as part of a balanced diet to ensure you're meeting your nutritional needs.
