I have been hypothyroid for about 17 years. My first test it was off the charts. Stupidly I had Chronic Lyme, Crohn's, asthma, oh tons of other stuff and never really did the homework like I am now on what this means and what my options are, I just took the synthroid and went on with life. There's a lot to read and various opinions out there. For some iodine seems to work. For others it seems to trigger a meltdown. Here is a link to a comprehensive collection of articles Chris Kresser wrote about the thyroid a couple years ago -
Thyroid Disorders . Chris is a researcher (and consults with patients as a practitioner of integrated medicine) and does a great job of distilling a lot of research and analysis in his blogs. He's not taking new patients and I'm not recommending him for that (I'm not a patient) but he does have a lot of great information.
Although his conclusions may seem a little biased to those who disagree, he shows where the data is coming from and explains why he feels the way he does and that gives me a clearer picture to decide for myself. He does not rant and I really enjoy his posts. He does agree that yes Dr. Abraham and Dr. Brownstein have successfully treated some people's hypothyroid using iodine, but he's very cautious about the damage it can do to others and believes, like Dr. Kharrazian, that with others it's complete avoidance of iodine that is necessary. There are really many issues affecting the thyroid and so many different treatments. Some can help themselves naturally, some can heal with supplements, and some will always need to take thyroid medication.
But if your friend reads all the articles including the comments where people argue with him, then she'll at least be much more informed and will be able to request the proper tests and feel a little more competent working with her Dr. to find a good treatment plan. After 17 years (and new insurance) I am finally going to an endochrinologist with my list of questions and will ask for the complete tests and hopefully address the issue with more than a synthroid pill. Perhaps your friend should consider asking for a referral to an endochrinologist and have them perform the more detailed tests and discuss treatment options instead of her regular GP. Just a thought.
Good luck to her.
Hope this helps.