2. Soy and its derivatives
Soy foods contain nutrients like vitamin B, fiber, potassium, magnesium, and high-quality protein. It is called a “complete protein” because it has all 9 essential amino acids the body can’t make on its own. But if you recently changed your diet because you have thyroid problems, be careful: soy might interact with hormone drugs used to treat hypothyroidism in women. Even though studies haven’t come to a clear conclusion, it’s essential to keep an eye on it.