Rice is for peasants. There’s a reason the Mongols beat the Chinese civilization. Fresh beef actually has a surprising amount of iodine. A few clams or sardines a week will cover it as well. Most nutritional deficiencies in history were from people eating plants and not meat. The ONLY sea vegetable I suggest to EVER eat as a chef, geographer and avid fisherman who knows how polluted the oceans are and Asian sourcing really works, should come from Maine. There’s a specific brand that should be easy to find online. Plus it supports American fisherman and sustaining some of the best ocean America controls. A lot of nori sheets used in sushi comes from polluted water which may even be radioactive. But no matter how much idodine you ingest, fluoridated water will hijack you anyways.