what should your ketone levels be
1 Under 0.6 mmol/L - a normal blood ketone value. 2  0.6 to 1.5 mmol/L - indicates that more ketones are being produced than normal, test again later to see if the value has lowered.  1.6 to 3.0 mmol/L - a high level of ketones and could present a risk of ketoacidosis.