A couple of months ago I was having tachycardia episodes several times every day. I read that it might be Iodine deficiency, ordered some, and within two days of taking it, the tachycardia was gone. The candida also started getting better. I don't need to supplement with super-duper probiotics, a little kefir does the trick. I've been working on detoxing all the halogens out of my system and hopeful that Iodine will help me get rid of pinworms, Ascaris and a worm that is in my head. Although I've been chastised for taking too much iodine, when I cut back to 4-5 drops twice daily, the candida flourishes and the tachycardia comes back.