That would be awesome if it did. I don't have Hashi's, but I'm hypothyroid, taking NDT (natural desiccated thyroid) and Lugol's iodine (in the morning) for it. I also have two thyroid nodules called Hurthle cells (doctors still don't know whether they're cancerous or not - I refused surgery, so we're monitoring it).
Never actually thought to take MMS in relation to these issues (I'm taking it basically for ovarian cysts, IBS and a lymph node), but if it helped with all these other problems as well, I'd really be a happy camper. I"m even more determined now to stick with it (and now that I'm taking it in capsules, there's really no reason why I shouldn't).
Btw I found here a few links about thyroid and MMS - hope they help? Some of the links posted back in January by Rev Ray.
g2cforum.org/index.php/list/welcome/11515-mms-the-thyroid-gland
www.healthsalon.org/338/mms-and-enlarged-thyroid-nodules-testimonial-no-8/
g2cforum.org/index.php/list/mms-discussion-and-information/8363-i-need-help-with-hashimoto-s-disease