Iodine is naturally found in seawater, and shrimp is a rich source of the mineral. While this mineral is important for thyroid health
, it isn't the flavor you want shining through in your shrimp scampi. Chef Robert Ruiz of the Carlsbad, CA, restaurant The Land & Water Co.
, says the first step to avoiding a strong iodine taste is to buy fresh (not frozen) shrimp, alive if possible. The USDA does not require a "use by" or "best by" date on frozen seafood, so it's hard to know how old the shrimp you're buying is. And, says Cree LeFavour, author of Fish: 54 Seafood Feasts
, the further shrimp travels, the more likely it is to be older and taste of iodine. So, if you can't buy fresh, frozen is generally okay, if it's produced domestically.