Why Test Strips?
There are three main ways to test the level of ketones in your body: breath analyzers, blood meters, and urine strips.
Breath analyzers measure the levels of acetate in your breath. While not directly responsible for ketone metabolism, acetate has been shown to correlate very closely to levels of beta-hydroxybutyrate (BHB, the most abundant ketone). But while the device has the benefit of being reusable, it’s also unfortunately one of the least accurate ways of measuring your ketones.
Blood meter testing measures the levels of BHB in your body. The testing process looks similar to the devices you see diabetics use — a quick prick of the finger, and then the machine analyzes the level of ketones in your blood. This is by far the most accurate test, but also one of the most expensive, and not very suitable for those with an aversion to needles.
For beginners, we recommend urine strips, as they’re the cheapest and easiest to use.
Once you become truly fat-adapted, the amount of excess ketones in your urine will decrease, so you may have to upgrade to a different testing method — or you’ll just know your body and how it feels in ketosis that you won’t have to test at all!