I bought this initially for my family. My mother is almost through her Ovarian cancer treatment. Her naturopath has insisted that she must be deficient in iodine and her thyroid is underactive. I also bought this for myself as I have a uterine fibroid, fibrocystic breasts and heavy menstrual bleeding and I've read that this will help shrink the fibroid, and any cysts in my breasts and lessen the bleeding. Additionally, I bought this for my teen-aged son who has issues with focus and concentration in school. Lastly, I bought it for a close friend who is a diabetic. I also read that it helps with insulin production. In ALL cases, the outcome has been phenomenal. My mother's test results are showing that her thyroid is more in line with where it should be. After using for less than a week, my periods were markedly lighter, shorter and pain-free. No tenderness in my breasts which is basically how I gauge when my period is coming (sorry for being so graphic, but it's necessary here!). Still waiting on test results from the ultrasound to see if the iodine helped shrink the fibroid but I'm sure the results have to be in line with what I've already experienced. My son reported remarkable focus, concentration and energy within a day after starting the iodine and my friend reports the same. I'm beyond thrilled with the results of this product and have been recommending to everyone who asks