I am so distressed to hear about your suffering (which we all share or have shared.) I am medical researched obsessed and since I am still suffering from GD, albeit on a reduced level from before, I am interested in all possible causes as it might be multifactorial in each of us. What makes you worse could be making me worse. What helps you might help me. My research has led me to many health issues, causes and solution and we all have to be concerned with metal toxicity. The fact that cilantro has helped so many in this group points to heavy metals as a possible cause. So I directed my attention to aluminum toxicity.

Have you identified the source of your aluminum overload? Some common sources of aluminum are chronic use of antacids, buffered aspirins, drinks from aluminum cans ( acid in drinks frees up the aluminum in the can,) teas - all varieties: black, green, white. Aluminum is present in many processed foods. Aluminum can be present in your water. Citrate can increase the amount of aluminum you absorb. (Citrate is the mechanism of water conditioning I have been using. End of that for me. I have been drinking black tea - at least a quart a day with the teabags left in the hot water the entire time - since I was 8 and I am 72. End of that for me.)

Silica (present in some mineral waters, but not all) is a good detox vehicle for aluminum. Silica is also present in certain foods: cucumbers, oats, brown rice, wheat, strawberries, onions, avocados, and root vegetables. Some bottled waters have more silica than others. San Pellegrino has silica, Perrier does not. There are silica supplements. Not sure about safety, purity or amounts one should (or should not) take. Here's an article about aluminum toxicity: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2782734/ Here's an article about use of silica to reduce aluminum load and effect on Alzheimer's disease https://pubmed.ncbi.nlm.nih.gov/17435954/ Here's an article about silicon supplementation and effect on reducing aluminum. https://pubmed.ncbi.nlm.nih.gov/21198634/

When I am researching something, I type in the key words and write NIH after the phrase I am researching. This brings up NIH (National Institute of Health) a government agency that sponsors research on various topics and many of the articles also summarize research of others. This keeps me mostly away from questionable sites and businesses that are selling stuff.

Hope some of this helps. Itching is a cruel kind of suffering.