2. Weight Loss
Ketogenic diets, along with normal low-carb diets, are highly effective for losing weight (5, 6).
As dozens of weight loss studies have shown, you will likely experience both short- and long-term weight loss when switching to a ketogenic diet (5, 7).
Fast weight loss can occur during the first week. While some people believe this to be fat loss, it is primarily stored carbs and water being used up (8).
After the initial rapid drop in water weight, you should continue to lose body fat consistently as long as you stick to the diet and remain in a calorie deficit.
Bottom Line: Fast weight loss commonly occurs when you start a ketogenic diet and severely restrict carbohydrates.