I cannot take supplements with large amounts of soy. I've tried them and then ended up wanting to sleep for two days. I also have thyroid problems but the opposite of Laurie above. Mine has been overactive but after taking medication for 13 months, it went back to normal, thank goodness.
Before I knew that I couldn't have soy, I tried Baca burgers and they were horrible. Soy milk is not much better. Soy actually has a lot of calories in it and is not really as much of a diet food as the promoters would like you to think. Check the calorie content next time you are at the store.
Laura