Supporters of the Atkins Diet claim that a low carbohydrate diet is a safe and effective method for losing weight. This article evaluates the low carbohydrate diet and specifically the claims made about ketosis.
The Low Carb-Ketosis Link
By severely limiting carbohydrates in your diet, the main energy source used by your body, glucose, drops to low levels. In return, insulin levels also drop. With low glucose and low insulin levels, the body turns to alternative sources of energy.
Because of a significant change in your body's chemistry when on the Atkins Diet, certain metabolic pathways are turned "on" that are normally not "on" or run at very low levels. One such pathway involves the breakdown of fat, called Beta-Oxidation of Fats.
Now, normally fats are broken down to produce energy when your body senses a need. But in the context of a low Carb diet, the normal breakdown pathway of fats is altered and an alternative pathway kicks in. This alternative pathway produces what are called ketone bodies.
Ketosis is the term used to describe when ketone bodies are circulating in your bloodstream. The ketone bodies can be used as alternative sources of energy by, most importantly, your brain.
In case you might be curious, the three ketone bodies produced by this alternative pathway for breaking down fat are acetoacetate, beta-hydroxybutyrate, and acetone. These ketone bodies are formed in your liver and then are transported to other tissues, mainly the brain. In your brain, they are converted back to a form that can provide direct energy during times of starvation.
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