Switching to ketones after running on carbohydrates almost half of your life can be tough. Moreover, the temptation to get things done (like losing weight and getting that dream body) faster is great, yet compromises a great deal of your health and of the process in general.
The key to a successful ketogenic diet and intermittent fasting is the adaptation.
Premature adaptation to this process can tap the glycogen and sugar reserves instead of ketones, signaling the adrenaline to rise to activate the hypoglycemic symptoms. As a result, they experience conditions like lightheadedness, dry mouth, thirst, instant exhaustion, weak muscles, and cravings.
Cortisol (aka stress) will then begin to increase. The right approach to intermittent fasting is gradual adjustment. Say for instance, sticking to only three meals only without snacks. A steady decrease is beneficial as it allows your body to get comfortable with the changes.