Measurement of blood ketones is the gold standard method used to measure blood BHB in response to endogenous or exogenous ketosis. Either way, a state of ketosis means you’ll have ketones in your blood as well as your urine, and perhaps in your breath. This means that ketones can be measured using devices tailored to each specific molecule, based on where it’s most likely to be present in detectable amounts. MCTs, while not ketones, are a type of fat that is highly ketogenic.