Unveiling the Truth About the Keto Diet

6. Increased Energy

As the body moves from using mostly carbs for fuel to mostly fat, there's a brief period where dieters feel "off," as their body gets used to the new fuel source. Although many report feeling tired and sluggish at first, after the "keto flu" feeling has worn off, a lot of people find their energy levels increase. The fatigue may last from one to several weeks and is the period during which the body adapts to burning fat. After adaptation, consistent blood sugar levels contribute to more regular energy because the body is not experiencing sugar highs and crashes throughout the day.