Brenda, you can get them from your pharmacist (behind the counter) but to be honest they arent great indicators of fat burning - too many things effect the results - how much water you drink, if you've eaten anything fatty, when you test and if you've exercised. There are better indicators: have you lost your appetite? Do you have keto breath? (fruity sweet smelling breath that no amount of toothpaste will cure) and chief among all indicators: are you losing fat

Here's a little more on Ketosis and Fat burning .

Nat