Personally, for me, I didn't wait, and I did start the Iodine while doing a 30 parasite and worm cleanse. I attributed the parasite cleanse with the cure of my chronic problem on my thigh to my knee..maybe it was the Iodine, or both together?
You can find where to purchase and the types of Iodine to purchase if you click the above link "Iodine answers" and also read the FAQ's also see above link as it's very informative.
There's lots of reading ahead for you, but all worth it.
As for being healthy, or toxic to some degree, you must determine what in your mind is good or excellent health.