this post was submitted on 16 Jun 2023
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This could be for marine algae, which might have high iodine and sometimes high organic arsenic (though there is some debate over how toxic that is) - but freshwater algae are not necessarily high in iodine. Like spirulina for example.
Seems to be species dependent. But it doesn't seem to be well studied. But the variation in iodine levels is crazy...
Source: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8035890/
yep, these are all marine algae. I think the market will develop and more consistent products (and no doubt thorougly coated with preservatives) will become prevalent once dear old General Mills, ConAgra, and their like enter the fray.