I am presently doing the Iodoral's (4 tablets, as of this morning) and Lugol's (15 horizontal drops & 2 vertical drops, as of last night). I have not, thus far, seen a difference in either one. I will continue this way though, so as to get 2 doses a day. I am doing the IP6, in the am, and to keep the length time apart the Iodoral's is easier for me in morning cause if I get up late, I can take the pills along to work.
As to where, I have purchased the Lugol's from Science company and the Iodoral's from http://www.breastcancerchoices.org
(someone mentioned they were less expensive, I will continue to buy from BCC due to "your order supports Breast Cancer Choices' Iodine Investigation Project for Breast Cancer patients" quoted from Sally at BCC. I see by helping yourself you can help others!)