Diabetes Self-Management Articles

These articles cover a wide range of subjects, from the most basic aspects of diabetes care to the nitty-gritty specifics.

Links not loading properly?

Some of our pages use Portable Document Format (PDF) files, which require Adobe Acrobat Reader. To download Acrobat Reader for free, visit www.adobe.com.

Sign up for our weekly e-mail newsletter and receive a FREE GIFT! Enter your e-mail below.

Learn more

Learn more about diabetes

Links to help you learn more about diabetes.

Ask a diabetes expert
Other diabetes resources
Browse article topics

 

Getting to Know Ketones

by Richard M. Weil, MEd, CDE

People with diabetes, particularly those with Type 1 diabetes, have been at least vaguely aware of the word ketones for a long time. With the recent resurgence of popular interest in low-carbohydrate diets, however, just about everyone seems to be talking about ketones these days. But does anyone really know what a ketone is? Are they a danger to your health (as in diabetic ketoacidosis), or a sign that you have lowered your carbohydrate intake enough to cause weight loss (as some people who follow low-carbohydrate diets believe)?

What are ketones?
Ketones are end-products of fat metabolism in the body. That is, they are formed when fat is burned for energy by the muscles. Chemically, they are acids known as ketone bodies, and there are three types: beta-hydroxybutyric acid, aceto-acetic acid, and acetone. But you don’t have to be a chemist to understand what role they play in the body.

To get to know ketones, it’s helpful to understand how your body burns fuel. A simple analogy is that of an automobile. For a car engine to run, the engine must burn fuel (gasoline), and when the fuel is burned, exhaust (carbon monoxide) is created. The carbon monoxide is the end-product of gasoline combustion.

Your body also has an engine that must burn fuel to operate. The engine is muscle, and the fuel is fat, carbohydrate (glucose), and, in certain conditions, protein. When fat is burned, the “exhaust” is ketones, and when glucose is burned, the “exhaust” is lactic acid.

Fat is more desirable as a fuel than glucose because there are more calories in a gram of fat (9 calories per gram) than there are in a gram of glucose (4 calories per gram), so you get more energy per gram of fat burned. In a sense, you could call fat a high-test fuel. But there is one catch to burning fat: To burn it efficiently, with little “exhaust,” you have to burn glucose at the same time. If you don’t have glucose available for fuel (because you are on a low-carbohydrate diet, for example), you will form ketones when your muscles burn fat.

For most people, the ketones that form as a normal product of fat burning and weight loss are nothing to be concerned about because they are simply burned for energy by the body, and any excess are passed out of the body in the urine. In fact, while the brain normally uses glucose for energy, during exercise — and particularly during long-distance events like marathons, when glucose reserves may drop very low — the brain can use ketones for energy. Your liver makes extra ketones when glucose reserves are low so that your brain has enough energy.

For people with Type 1 diabetes, however, having measurable amounts of ketones in the urine (or blood) is cause for concern. Ketones in a person with Type 1 diabetes may be a sign that his diabetes is out of control, he is ill or has an infection, or he is under extreme stress. Because above-normal levels of ketones in the blood can lead to diabetic ketoacidosis, a life-threatening condition, people with Type 1 diabetes who have measurable ketones in their blood or urine should speak with their diabetes educator or doctor promptly.

Low-carbohydrate diets
Low-carbohydrate diets are sometimes called “ketotic” diets because they cause the body to burn mostly fat for energy (since the intake of carbohydrate is so low), which in turn causes the formation of ketones. Some people who follow low-carbohydrate diets periodically test their urine for ketones to see if fat-burning is indeed taking place. However, people who are losing weight on any diet might have a trace of ketones in their urine since a person who is losing weight is almost certainly burning and losing fat.

Page    1    2    3    4    Show All    

Also in this article:
Ketone Strips

 

 

More articles on High Blood Glucose

 

 


Statements and opinions expressed on this Web site are those of the authors and not necessarily those of the publishers or advertisers. The information provided on this Web site should not be construed as medical instruction. Consult appropriate health-care professionals before taking action based on this information.

 

 

Gestational Diabetes: Once You're Diagnosed
If you're a pregnant woman, probably one of the last things you want to hear is that you have... Blog

Transitioning to Adult Care
When it becomes time for a teen or young adult to leave his childhood diabetes care providers... Article

The Alkaline Diet: Balancing Acid and Base
If you thought fashion was subject to trends, you should take a look at diets. A couple of... Blog

What do I need to do to keep my blood glucose levels within target range? Get tip