Re: hypothyroidism

 Iodine is not going to do much if you cannot utilize it properly.

I'm iodine deficient despite eating fish, salt,...

Could you please explain that?

I have gut problems, leaky gut,... linked to that?

It is not likely leaky gut.  Deficiencies despite supplementation generally result from a high halogen exposure (chlorine, fluoride, bromine) or an allergy to the supplemental iodine so the body would attack and eliminate it.