"Some tissues use the X-factor (vitamin K) to oxidize Iodide to iodine, whereas others don't. In a body that's deficient in X, the tissues that normally use X to convert Iodide to Iodine cannot do it, owing to absence of X.
This explains why 'some tissues in the body would respond better to elemental iodine, than they do to iodide.' "
JT here. To help cover your bases, take either Vitamin K2 MK4 or MK7. Both forms are readily available.