my diet is dominated by fruits and vegetables, so my major sources of iodine are eggs, cheese, yogurt and ice cream. essentially nothing in my diet has added salt in it, except the cereal. it should be enough, on paper - but it's probably pretty close. the cereal is also a recent addition; for years, about the only sources of salt in my diet were from cheese and hot sauce.
my sodium levels tested lowish.
i've been trying to get my iodine tested, but the test that is covered isn't offered anywhere and they want to charge me $200 for it - which is infeasible.
my tsh was lowish...
so, everything is ish:
calcium - highish
d - lowish
tsh - lowish
sodium - lowish
it's plausible, but it's not a smoking gun.