what is a ketones
Checking for Ketones. Ketone is a chemical produced when there is a shortage of insulin in the blood and the body breaks down body fat for energy. Ketones in the urine is a sign that your body is using fat for energy instead of using glucose because not enough insulin is available to use glucose for energy.etones in the urine is a sign that your body is using fat for energy instead of using glucose because not enough insulin is available to use glucose for energy.