I don't know, Bob. I mean, the sticks are an indicator of whether or not I'm in ketosis. I don't use the strips every day, but I was curious to see if the vodka would affect my ketosis, and it did. So the strips helped me, becasue if I hadn't checked I might have continued to think it was okay to drink vodka and I'd be throwing myself out of ketosis, all the while thinking I'm being a low carb angel...