Find Information About:

Drugs & Supplements

Get information and reviews on prescription drugs, over-the-counter medications, vitamins, and supplements. Search by name or medical condition.

Pill Identifier

Pill Identifier

Having trouble identifying your pills?

Enter the shape, color, or imprint of your prescription or OTC drug. Our pill identification tool will display pictures that you can compare to your pill.

Get Started

My Medicine

Save your medicine, check interactions, sign up for FDA alerts, create family profiles and more.

Get Started

WebMD Health Experts and Community

Talk to health experts and other people like you in WebMD's Communities. It's a safe forum where you can create or participate in support groups and discussions about health topics that interest you.

  • Second Opinion

    Second Opinion

    Read expert perspectives on popular health topics.

  • Community


    Connect with people like you, and get expert guidance on living a healthy life.

Got a health question? Get answers provided by leading organizations, doctors, and experts.

Get Answers

Sign up to receive WebMD's award-winning content delivered to your inbox.

Sign Up

Diabetes Health Center

Font Size

Tests for Ketones - Topic Overview

A ketone test checks for ketones in your blood or urine. Ketones are substances that are made when the body breaks down fat for energy. Normally, your body gets the energy it needs from glucose (sugar). If your body cannot use glucose for energy-for example, if your body doesn't make or use insulin-ketones are formed. You might also have ketones if you are not eating enough carbohydrates and your body uses fat for energy instead. Your body wants to get rid of ketones through urine.

Ketones are most common in people who have type 1 diabetes. It is an early sign that there is not enough insulin, and blood sugar may be dangerously high. This can lead to diabetic ketoacidosis, a very serious medical problem.

Recommended Related to Diabetes

Sam Talbot Shares Diabetes-Friendly Recipes

Sam Talbot, runner-up and fan favorite from season two of Bravo's "Top Chef," is former executive chef of Imperial No. Nine in New York's Mondrian SoHo hotel and the Surf Lodge in Montauk, N.Y. Talbot, 34, also lives with type 1 diabetes. In his cookbook The Sweet Life, published last year, he shares his personal health and wellness philosophy, as well as some of his favorite diabetes-friendly recipes. Here he dishes even more about how he stays healthy. What's your approach to cooking and food? I'm...

Read the Sam Talbot Shares Diabetes-Friendly Recipes article > >

Blood ketones can be tested using some blood sugar meters. You can test your urine for ketones by using specially prepared tablets or plastic strips.

    WebMD Medical Reference from Healthwise

    Last Updated: November 14, 2014
    This information is not intended to replace the advice of a doctor. Healthwise disclaims any liability for the decisions you make based on this information.
    Next Article:

    Today on WebMD

    Diabetic tools
    Symptoms, diagnosis, treatment, and more.
    woman flexing muscles
    10 strength training exercises.
    Blood sugar test
    12 practical tips.
    Tom Hanks
    Stars living with type 1 or type 2.
    kenneth fujioka, md
    Can Vinegar Treat Diabetes
    Middle aged person
    Home Healthcare

    Prediabetes How to Prevent Type 2 Diabetes
    type 2 diabetes
    food fitness planner