Green & indigenous News

I don't think seaweed is the microplastic source we should be fixating on:

Recent studies have found microplastics in bottled water (Gambino et al., 2022), food and agricultural products (He et al., 2021), beet sugar (Yurtsever and Cüvelek, 2024), takeout food containers (Du et al., 2020), beverages (Jin et al., 2021), and seafood (Garrido Gamarro et al., 2020; Al Mamun et al., 2023). Seafood is one among the primary sources through which humans can accumulate microplastics (Smith et al., 2018)

Since most animals eat plants, almost any problem you have at the plant level compounds or worsens at the animal level. Fish and "seafood" are the typical animal source of iodine, but they either eat algae, filter feed or eat animals who filter feed, so the microplastics accumulate. Generally, the lower down the food chain you eat, the fewer microplastics/heavy metals you'll get.

About other animal based sources, land animals are not magical iodine producers, they also need to get it from their diet like us and are usually supplemented iodine. Just use some iodized salt for cooking, idk if it has different concentrations in the US but I've never heard a single person saying it tastes bad. Or eat some seaweed, the iodine is incredibly concentrated anyway and it probably has fewer microplastics than other dietary sources.

Source is Wikipedia:

The production of ethylenediamine dihydroiodide, provided as a nutritional supplement for livestock, consumes a large portion of available iodine