When you're used to eating every three to four hours, yes, you will be hungry. You may get a headache, you might feel tired, cranky, irritable, and maybe even nauseous. Know that these feelings won't last.
Fasting will be challenging for the first four to seven days, and maybe even for longer, but Dr. Jason Fung, MD, author of The Complete Guide to Fasting reassures that your body quickly adjusts. After the first week or two, your mind will feel clear, you'll likely have more energy, and you'll actually feel less hungry.
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