There is a site online that advertises 15% & 7% Lugol's. I broke the formulation down (using their posted formula) & their 15% is actually what is commonly considered 5% Lugol's. This was fine but I was concerned that if there 15% was only 5%, then what was in their 2% (which was not included in the posted formulations) since their 3% was actually 1%.
I contacted them & they claim to include the potassium Iodide in their percentage numbers & their 2.2% would be more commonly considered .73% Lugol's. That would be a LOT of liquid for someone trying to get 50 mg.