I read the instructions a few times before doing the test and to make sure I'm doing the test correctly, with the correct procedure, I then used the product on several occasions and what I found was the active part of the test strip (both to and bottom) did not change colour whatsoever. At one point (for a sanity test), I left a test strip for 5mins, after use and found that the active part of the test strip (both top and bottom) still did not change colour.
To give a bit of a background, I'm currently on a ketogenic diet and hence I expected to be able to detect ketones from the strip. My carb intake at max. is 70g on off days but on average it is currently around 25/30g per day
Whilst I'm sure this test method may work for some people, for me I think that there are better methods for testing blood sugar/ketones
I wouldn't discourage other people from using it, all I would do is give my experience with it. Therefore I'm bagging the product as such but this product is not for me