"I had this under my pillow for some time and felt it did help, I moved it to the fridge to see if helped with food freshness, which I feel it does, and I started complaining to my husband that I hadn’t been sleeping well, he commented isn't your new copper tube working? And it clicked, I had moved it to fridge around the time my sleep worsened but I hadn’t connected the dots till my husbands sarcasm! I wasn’t a horrible sleeper to start with but I would say I notice a difference!"