I ordered 5 bottles of this with a 100% money back guarantee. I returned 4 unopened bottles and 1 half full bottle. They said more than one bottle was opened so I got back half my money. Don't believe their lies about 100% money back guarantee, I had to stop taking because it caused major migraine headaches.
I explained that I only opened one bottle and the rest stayed in the envelope they were shipped and returned in. They have done nothing to resolve this issue. I'm out the money, after two weeks migraines are finally gone.