I tried Naural Calm for free. My doctor recommended magnesium supplements after pain meds were failing, so I googled and came across naturalcalm ca, and I was very surprised at how well it works. I was a little taken aback by the effervescentness, i didnt expect it to bubble up and the first try it mostly ended up on the counter, but I figured it out. Cherry is my favorite flavour. After drinking it, I found by the next day I was more capable of moving my legs and my back wasn’t hurting as bad, it also cleared up my brain fog. Its a great product and it tastes great too. I will purchase and recommend.