They have them at walmart, not too expensive. I just googled it because I was thinking it would be a relief to know for sure that I'm in ketosis. I only experience any "ketosis" symptoms some of the time, it was pretty strong at first but now I can hardly tell. But is it a good buy? I drink A LOT of water, and I'm thinking that might dilute the smell and symptoms a bit. And I also wonder if it would make the urine test negative even if I am in ketosis...thus freaking me out even more lol. Is that realistic? Has anyone tried these tests before?