I think that I will do a morning and evening test of the 3 methods, at least until I am done with my fast.
cheap breathalzyer 0.4% bac
novamax blood ketone strip 0.8 mmol/l
ketonix 2.0 PPM
Hmm... Not sure what is up with the ketonix. I checked it this morning and it was 5.8. Then I mowed the lawn in 95 degree heat and afterward it was 8.5. Now 2.0. I think I will have to continue to test the ketonix at least before and after any exercise/heavy exertion.
My understanding of the way things work in general: ketone bodies are produced in the liver and they become either beta hydroxybutarate or acetoacetate in the blood. Both of these when metabolized break down into acetate. Acetoacetate is the ketone body that is used immediately. Beta hydroxybutarate is a temporary storage for acetoacetate for later use. If the beta hydroxybutarate is to be metabolized, it is first converted back into acetoacetate. Thus when either acetoacetate or beta hydroxybutarate are metabolized, acetone is the byproduct.
Urine ketone test strips detect only acetoacetate, i.e. ketones that have not been utilized by the body.
Blood ketone test strips detect only beta hydroxybutarate. i.e. ketones that have been stored in the blood for possible later use.
Breath ketone testers (both ketonix and cheapo breathalyzers) detect acetone.
So my understanding of the different ketone testing methods is this:
Urine strips detect only the ketone bodies you didn't burn.
Blood test strips detect only the ketone bodies that are in your blood. They may be burned or flushed out of the system through urine and breath.
Breath tests detect only the ketone bodies that have been burned.
Please feel free to correct anything that I have gotten wrong.