to burn fats for energy and fats require conversion to ketone bodies in order to be utilised by the cells of the body as an energy source. The ketone bodies are acidic hence when the body is entirely reliant on these ketone bodies for energy the levels in the blood reaches a point where it overwhelms the body's natural mechanisms to keep blood pH (a measure of acidity) within a safe range, leading to the blood becoming acidic which is potentially damaging to the tissues of the body due to the ability of acidic environments to denature the proteins of the body. Anaphylactic reaction a potentially life-threatening allergic reaction Sudden cardiac death References Olanzapine