I have a lot of personal experience.
So I feel I have a good idea of what supplements work. And I can tell you what works for them. What you don't want to do is buy an expensive supplement and assume that it is going to work, just because you heard about it. You have to read the ingredients on the package. I have tried many times to get the product to work with my thyroid gland by diluting the product. I have tried to dilute it to the point where it is a clear liquid. That is a very easy thing to do and it works, but I have had the problem that the product doesn't actually dissolve in water. You have to have something like vitamin C in it to get a good result, and it is usually in the form of citric acid or sodium acid pyrophosphate, so the citric acid is a white crystal. That is what your thyroid gland is looking for to be able to be in the proper range to work properly. Then there is also calcium, magnesium, and a vitamin E that will help your body absorb it. So, you have to make sure that you are using the right products.