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What exactly is a Very Low-Calorie Ketogenic Diet

What exactly is a Very Low-Calorie Ketogenic Diet?

A Very Low-Calorie Ketogenic Diet (VLCKD) is a specific dietary approach that combines the principles of both very low-calorie diets (VLCDs) and the ketogenic diet. It is designed to induce a state of ketosis, where the body primarily uses fat for fuel instead of carbohydrates.

VLCKDs typically involve consuming a highly restricted number of calories per day, usually ranging from 500 to 800 calories. These diets are often medically supervised and closely monitored to ensure safety and proper nutrient intake. The limited caloric intake in a VLCKD is intended to create a significant energy deficit, leading to rapid weight loss.

The distinguishing feature of a VLCKD is its emphasis on the ketogenic aspect. Ketogenic diets are characterized by a very low carbohydrate intake, usually below 20-50 grams per day, which forces the body to enter a state of ketosis. In this metabolic state, the liver converts stored fat into ketones, which become the primary source of energy for the body and brain.

The combination of very low-calorie intake and ketogenic macronutrient composition (high fat, moderate protein, and low carbohydrate) in a VLCKD offers several potential benefits, including:

Rapid Weight Loss: The significant calorie deficit, coupled with the metabolic effects of ketosis, can lead to rapid weight loss, making VLCKDs appealing to individuals aiming for quick results.

Appetite Control: Ketogenic diets have been reported to help control appetite and reduce food cravings, which can aid in adherence to the VLCKD and facilitate weight loss.

Metabolic Benefits: VLCKDs can improve markers of metabolic health, including blood sugar control, insulin sensitivity, and lipid profiles. This can be especially beneficial for individuals with conditions such as type 2 diabetes or metabolic syndrome.

Enhanced Fat Burning: By restricting carbohydrates, the body relies on stored fat for energy, promoting increased fat burning and potentially accelerating weight loss.


It is important to note that VLCKDs are typically employed for a limited duration, often under medical supervision, due to the highly restrictive nature of the diet and the potential risks associated with very low-calorie intake. VLCKDs may not be suitable for everyone, and it is crucial to consult with a healthcare professional before considering such an approach, especially if you have any underlying health conditions or are taking medications.


In summary, a Very Low-Calorie Ketogenic Diet combines the principles of very-low-calorie diets and the ketogenic diet, aiming to induce rapid weight loss through a restricted caloric intake and the metabolic state of ketosis. 


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