I am presently recovering from CFS after a seven year bout with it. It was a horrible nightmare which I had to pretty much pull myself out of because the medical profession can't treat chronic diseases successfully. But that's another story.
About 6 weeks ago, I started having these terrible headaches. They were excruciating, unlike any headache I've had before. And I've had dengue fever twice. Anyone who has had dengue knows how bad those headaches are. And these were worse. I was having to give myself injections AND take pills for the pain.
I went to a few doctors, had a CT scan of my brain, some other tests, got treated for a sinus infection in the middle of this, but nothing helped. Nobody had a clue what was causing them. I have some liver problems so I was always a bit scared of trying MMS, even though I had MMS and the activator bottles in my house - I had given plenty of it to friends. I spoke with a naturopath about it and he said he didn't see any major problem, if I had bad effects I could just stop. And there is an antidote: 5 grams vit C and activated charcoal.
So I started with one drop twice a day. After 3 days, I felt the headaches becoming less in intensity. So I increased to 2 drops twice a day. Now, after a week and 2 days of MMS at 2 drops twice a day, the headaches are almost completely gone! I just felt mild pain today! I can't believe it! I wish I had tried it weeks ago, I was running out of room on my butt to give myself injections - it's all numb back there! Apparently, it was some bad bugs in a place where they've never ventured before and that was causing the pain. And to think all the money I wasted on doctors.
Since there's no patent, there's no money for testing. So that means the only way to really know about it is word of mouth. So this is my 2 cents.
The worst side effects I have read about are nausea and vomiting. Some drugs list worse side effects than this. I have read some very negative things about MMS, claiming how dangerous and unwise is it to use it. But all these people who bash it have one thing in common: they have never used it. Personally, I am only interested in firsthand experiences from people about any alternative medicine.
Anything else is just a guess.