Thyroid Superfoods Roasted seaweed. Seaweed, such as kelp, nori, and wakame, are naturally rich in iodine--a trace element needed for normal thyroid function. ... Salted nuts. Brazil nuts, macadamia nuts, and hazelnuts are excellent sources of selenium, which helps support healthy thyroid function. ... Baked fish. ... Dairy. ... Fresh eggs. Jan 11, 2018