I was just going to suggest you try some metabolism stimulating products. Since having my thyroid problem I have seen quite a few natural remedy products out there. As you know my problem is the opposite to yours but it's all to do with your thyroid when you have metabolism issues. I have to avoid kelp and iodine so that would make sense that you would benefit from them. I also need to try lemon balm to slow mine down so avoid that!
Let us know how you get on with your natropath... and thanks for all the support with my issue... as usual, we are chalk and cheese!