If you suspect that you may have hypothyroidism, consider eliminating soy. Soy is a potent goitrogen. You can find out more about goitrogens here. Apparently, several fruits and vegetables are also goitrogens when eaten raw. There’s a list of them on the link.
I’ve had problems of a different sort before with soy. In one of my big weight loss efforts, I was on the Medifast diet. Virtually all of the program foods on Medifast are soy. Time of month became much heavier, and I was more irregular. Soy is known to affect hormones. For one, it has phytoestrogens that mimic the estrogens in the body. Feeding a baby soy formula is like giving it five birth control pills a day. To make matters worse, most of the soy in the United States is genetically modified, including the soy used by Medifast. I thought about doing that diet again this time, but I decided that I did not want to expose myself to that much soy. There’s some in the NutriSystem foods, but it doesn’t comprise nearly as much of the diet.