A ketone level between 1.6 and 3.0 mmol / L is high and increases the risk of diabetic ketoacidosis. Drinking fluids and taking your insulin can bring down your ketone level. OK Wow Keto If your level doesn't decrease or continues to rise, go to the hospital. A ketone level higher than 3.0 mmol / L is a medical emergency. The GAPS diet has been promoted as an effective way to treat several health conditions.