Hakala Labs is less $
they test Iodine
and serum/saliva ratio to check to transport problems: symporter defect or organification problem
they are really fast in testing and getting results back to you, I use them a lot with my bodywork clients
FFP Labs is Jorge Flechas' lab in North Carolina
they are more $
they additionally test
Heavy metals through Genova labs
Testing can be really useful and also can be misleading at times.
I recommend to most people who want to test to consider doing both the Iodine loading test and bromide for baselines.
if your bromide is high now and you test again in 6 months you know you have more work to do. This can be important for people who don't notice much after several months on Iodine, the test can be a carrot for them to continue.
if you excrete more than 90% of the Iodine in the loading test you know you have an organification or symporter problem most likely and you want to be really sure you focus on those companion nutrients to fix those problems.
when I tested two years ago my excretion was about 87% and my bromide was 16. It didn't seem that bad from what I understood at the time. They like to see bromide below 10 and Iodine at 90% excretion. So I wasn't sure what to make of that, because I have been pretty sick for a long time. I was thinking Iodine might be useful but it probably wasn't going to be a bullet for me.
I am still detoxing 9 months later, strongly at times.
and I have retested in July and my bromide output was even higher!
bottom line, if you are going to test, educate yourself a bit so you know how to read between the lines with this testing......