Intermittent fasting, also known as intermittent energy restriction, is any of various meal timing schedules that cycle between voluntary fasting and non-fasting over a given period.
Methods of intermittent fasting include alternate-day fasting, periodic fasting, and daily time-restricted feeding.
The practice of 16/8 intermittent fasting involves limiting your intake of foods and calorie-containing beverages to a set window of 8 hours per day.
You abstain from food for the remaining 16 hours, though you're still allowed to drink water and other no-calorie beverages, like plain coffee or tea.
Intermittent fasting is an eating pattern during which you refrain from consuming any calories for an extended period of time. Usually, this period lasts between 12 and 40 hours.
Some side effects of Intermittent Fasting include.
Hunger and cravings. It may be no surprise that hunger is one of the most common side effects related to intermittent fasting.
Headaches and lightheadedness.
Digestive issues.
Irritability and other mood changes.
Fatigue and low energy.
Bad breath.
Sleep disturbances.
Dehydration.