What Are Ketones?

ketones what are they

What are ketones? Ketones (naturally occurring substances) occur when the body metabolizes fat and releases it into the bloodstream. Because ketones are fat-soluble, they must be broken down into smaller pieces in order to be absorbed into the blood stream. The only exception to this is the small intestine, which can absorb them, but only partially. Therefore, ketones are often used as a weight loss aid.


Ketones are composed of three key amino acids: Glutamine, Glycine and Leucine. Glutamine is a well known nutrient with multiple health benefits. Among them are the ability to protect muscle cells against damage from free radical activity, promote the growth of new cells and improve the immune system. Glycine, on the other hand, has been shown to improve endurance and increase physical performance. Leucine has also been shown to improve endurance, reduce body fat and increase lean muscle mass.


Unfortunately, ketones are also considered a weight loss aid because they reduce the amount of fat one eats, and they can be high in calories. However, research has shown that ketones do not lead to long term weight management, and once the weight is regained, it usually comes back quickly. For this reason, ketones should be used as a short term weight loss aid. People who eat large amounts of fat are still likely to have an effective diet if they combine it with a healthy, balanced diet and exercise.