Seaweed is a rare non-animal product rich in vitamin B12, making it an excellent meat substitute in vegetarian and vegan diets. It’s also touted as a superfood that can help you lose weight due to its high iodine and fiber content. But high iodine intake can lead to thyroid problems and even weight gain. Seaweed can also contain high amounts of heavy metals, depending on where it grows.
7. Soybeans and their derivatives
Soy products are rich in nutrients such as B vitamins, fiber, potassium, magnesium, and high-quality protein. It is considered a complete protein because it contains all 9 essential amino acids that the body cannot make. But if you’ve recently changed your diet because of thyroid problems, be careful: soy can interfere with hormonal medications used to treat hypothyroidism in women. Although the research is inconclusive, it deserves careful monitoring.