What Happens If You Don’t Eat for a Day?
Is this an accepted practice?
Not eating for 24 hours at a time is a form of intermittent fasting known as the eat-stop-eat approach.
During a 24-hour fast, you can only consume calorie-free beverages. When the 24-hour period is over, you can resume your normal intake of food until the next fast.
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In addition to weight loss, intermittent fasting can have a positive effect on your metabolism, boost cardiovascular health, and more. It’s safe to use this approach once or twice a week to achieve your desired results.
Although this technique may seem easier than cutting back on daily calories, you may find yourself quite “hangry” on fasting days. It can also cause severe side effects or complications in people with certain health conditions.
You should always talk to your doctor before going on a fast. They can advise you on your individual benefits and risks. Keep reading to learn more.
What happens to your body during this time
You’ll be well into your 24-hour period before your body realizes that you’re fasting.
During the first eight hours, your body will continue to digest your last intake of food. Your body will use stored glucose as energy and continue to function as though you’ll be eating again soon.
After eight hours without eating, your body will begin to use stored fats for energy. Your body will continue to use stored fat to create energy throughout the remainder of your 24-hour fast.
Fasts that last longer than 24 hours may lead to your body to start converting stored proteins into energy.
Are there benefits to this approach?
More research is needed to fully understand how intermittent fasting can affect your body. Early research does suggest a few benefits, though.
It can help with weight loss
Fasting one or two days a week may be a way for you to consume fewer calories over time. You may find this easier to do than cutting back a certain number of calories every day. The energy restriction from a 24-hour fast may also benefit your metabolism, helping in weight loss.
It can help you manage your cholesterol and sugar levels
Regular intermittent fasting may help improve how your body breaks down cholesterolTrusted Source and sugar. These changes to your metabolism may help reduce your risk of developing conditions like diabetes and cardiovascular disease.
It may help reduce your risk for coronary artery disease
A regular 24-hour fast may help reduceTrusted Source trimethylamine N-oxide levels in the long term. High levels of this compound are tied to coronary artery disease, so this may help reduce your risk.
Other benefits
Intermittent fasting may also help:
- reduce inflammation
- reduce your risk of certain cancers
- reduce your risk of neurological conditions like Alzheimer’s and Parkinson’s disease
Are there side effects or risks to doing this?
- have or have had an eating disorder
- have type 1 diabetes
- are pregnant or breastfeeding
- are under age 18
- are recovering from surgery
- Fasting more than twice per week may increase your risk for heart arrhythmias and hypoglycemia.
Will drinking water during the fast help?
How to eat-stop-eat the right way
- foods rich in protein, such as nut butters and beans
- dairy products low in fat, such as low-fat yogurt
- fruits and vegetables
- whole-grain starches
your body feel full long after eating. Fruits and vegetables contain water, giving you more hydration.