Kinesiology is a great tool, it reads the body's response leaving the guess work out. Americans have vastly different conditions to those in the UK. I know you have a ban on brominated oils for example, and possibly better food standards .. and only a few areas have fluoridated water.
We in the US are HEAVILY fluoridated & much of the populace drinks brominated soda pop & eat brominated grains & grain products.
It's very possible in light of these issues, that your need for Iodine may be much lower than ours here in the US.