What Are the Best Hours for Intermittent Fasting? (2024)

  • Best Time
    • How many days a week is fasting recommended?
  • Risks
    • Who should not do intermittent fasting?

What Are the Best Hours for Intermittent Fasting? (1)

Depending on your lifestyle and when you can manage to stop eating, the best hours for intermittent fasting include the 16/8 or 14/10 fasting periods.

Intermittent fasting is hailed by many as the new mantra of weight loss, disease prevention, and reversal of aging. Though this method has produced positive health benefits for many, it is better to discuss any radical changes in your diet with your doctor before starting it.

Intermittent fasting is a diet method, wherein you stick to a certain eating window throughout the day and abstain from eating during the other hours. This method needs some getting used to by the body.

Some people find it easy to stop eating for 16 hours and eat during an eight-hour window.

  • This means they will have their first meal of the day at 9 a.m. and their dinner at 5 p.m.
  • Because your body will typically begin to burn fat after about 12 hours of fasting, your weight loss starts at about 5 a.m. and continues to do so for the next four hours.

Though this is an ideal way for intermittent fasting, it is not practical. Hence, many people give up midway.

To combat this problem, many alternative methods of intermittent fasting have come up.

Time-restricted eating method (called the 16/8 or 14/10 method)

You listen to your body and understand your hunger patterns. Depending on when you can manage to stop eating, you have to set your fasting and eating windows.

  • The 16/8 method is popular because most people already fast while they sleep, so it is convenient to extend the overnight fast by simply skipping breakfast and having an early lunch. You have your first meal at 11 a.m. and your last meal at 7 p.m. (or 12 p.m. and 8 p.m., respectively).
  • The 14/10 method is where you fast for 14 hours and eat for 10 hours, which can be eating your first meal at 10 a.m. and your last meal at 8 p.m. This might be easiest to follow for those who have fixed working hours.

You are allowed to drink water or green tea and other no-calorie beverages and snacks during the fasting period.

How many days a week is fasting recommended?

Intermittent fasting is most effective for losing weight if practiced daily. Although, fasting is never easy due to people’s job shifts, extensive travel, or hectic work schedules. These people may find it difficult to practice intermittent fasting daily and may want to fast on alternate days or at least two times a week.

Extreme fasting techniques and lifestyles, such as fasting for 24 hours one day a week or fasting without drinking water, are not recommended.

On average, if you want to lose weight and shed one pound per week, you have to eat 500 calories less daily (to create a total deficit of 3500 calories in a week).

The two times a week method

  • You restrict calorie intake in 24 hours to 500 for two days a week.
  • During the other five days, you resume your normal eating diet (1800-2000 calories).
  • On the fasting days, you must have high-fiber and high-protein foods to keep the body full and the calorie count low.
  • Make sure there is a gap of at least one day between the two fasting periods.
  • This method does not have any fixed fasting and eating window.

The alternate-day fasting method

  • You restrict calorie intake to about 25 percent of your normal intake, irrespective of the fasting hours.
  • On non-fasting days, resume your regular diet.
  • Alternate-day fasting may have harmful consequences in the long run.

Who should not do intermittent fasting?

Intermittent fasting is easier said than done. It is not easy for many to forgo food for 16 hours a day regularly.

During fasting hours, many individuals experience:

  • irritability,
  • low energy,
  • persistent hunger,
  • temperature sensitivity, and
  • poor work performance.

This diet is not recommended for those who do manual labor or heavy lifting. Similarly, pregnant women, children, and those at risk of blood sugar fluctuations (who take oral medications or insulin for diabetes) should not indulge in intermittent fasting.

Intermittent fasting may trigger migraines in susceptible individuals. If you suffer from an eating disorder, do not attempt any sort of fasting diet. Mindful eating and regular physical activity are the best methods to stay fit and healthy in the long run.

SLIDESHOW The Best Diet Tips: How to Lose Weight the Healthy Way See Slideshow

Medically Reviewed on 2/14/2024

References

Image Source: everydayplus / Getty Images

Cleveland Clinic. Intermittent Fasting: 4 Different Types Explained. https://health.clevelandclinic.org/intermittent-fasting-4-different-types-explained/

Gleeson JR. Intermittent Fasting: Is it Right for You? Michigan Medicine. https://healthblog.uofmhealth.org/wellness-prevention/intermittent-fasting-it-right-for-you

What Are the Best Hours for Intermittent Fasting? (2024)

FAQs

What Are the Best Hours for Intermittent Fasting? ›

Depending on your lifestyle and when you can manage to stop eating, the best hours for intermittent fasting include the 16/8 or 14/10 fasting periods. Intermittent fasting is hailed by many as the new mantra of weight loss, disease prevention, and reversal of aging.

What is the best intermittent fasting window to lose belly fat? ›

Best Intermittent Fasting Method For Visceral Belly Fat

14/10 Method: Fast for 14 hours and have a 10-hour eating window daily. That means you restrict your food intake to a specific 10-hour period while abstaining from caloric consumption for the remaining 14 hours.

Is it better to fast 12 or 16 hours? ›

A good rule of thumb for those wanting to fast to improve their metabolic and overall health is to leave at least 12 hours between meals – ideally more – on a regular basis, according to Dr Adam Collins, Principal Teaching Fellow in Nutrition at the University of Surrey.

Why is 16 hours the magic number for fasting? ›

While both 12-hour and 16-hour fasting can promote fat burning, it's possible that a 16-hour fast may be more effective. This is because the longer fasting period may lead to a greater depletion of glycogen stores, which can trigger higher levels of fat burning.

Why am I not losing weight on 16:8 fasting? ›

If you've tried intermittent fasting but aren't losing weight, possible reasons why include overeating during your eating window and poor food choices. To help, you can try eating fewer calories, work on balancing your meals, or create a smaller or larger eating window.

What time should you stop eating to lose belly fat? ›

There's no set time you should stop eating to lose belly fat, but, as a guideline, you should avoid eating two to three hours before bed to stop it from disrupting your sleep and body clocks, which can cause belly fat gain. Studies show early dinners can help people lose weight.

Can I eat whatever I want while intermittent fasting and still lose weight? ›

It's not a diet, so unless you have individual dietary restrictions, you can eat whatever you want within the eight-hour time frame. But the plan will work best for weight loss if you are already making smart, nutrient-rich choices, said NBC News health and nutrition editor Madelyn Fernstrom, Ph.

Does lemon water break a fast? ›

Flavor without Breaking Fast: One of the challenges of fasting is the boredom of consuming plain water only. Adding True Lemon adds a refreshing twist without adding calories, which means it won't break your fast.

What foods should you avoid during intermittent fasting? ›

It's best to limit ultra-processed foods like packaged snacks, deep-fried items, sugary drinks, and most frozen meals. These negate the positive effects of 16/8 intermittent fasting. To begin 16/8 intermittent fasting, choose an 8-hour window and limit your food intake to that time span.

Does coffee break a fast? ›

Technically speaking, eating or drinking any calories breaks a fast. That means it's generally considered OK to drink black, unsweetened coffee or tea, as well as water.

What foods won't break a fast? ›

Foods and beverages that do not break a fast include water, black coffee, unsweetened tea, and diluted apple cider vinegar.

What is the golden rule of fasting? ›

The absolute most important rule is “Don't break your fast”.

Beware of foods labeled zero calories, as most will have trace amounts of calories that can break your fast if you eat enough. Drink lots of water, add a fiber source with your meals, or use a supplement to help manage hunger cravings.

Is it better to skip breakfast or dinner in intermittent fasting? ›

In the case of Intermittent fasting, skipping your dinner is better and easier. You can have your dinner either early or have a heavy snack and can begin your fasting. Research suggests that fasting in the evening and overnight, then eating early in the morning is the better way to follow this diet to lose weight.

How to speed up weight loss on intermittent fasting? ›

A person needs to decide on and adhere to a 12-hour fasting window every day. According to some researchers, fasting for 10–16 hours can cause the body to turn its fat stores into energy, which releases ketones into the bloodstream. This should encourage weight loss.

What foods should you cut out to lose weight? ›

Generally, it's a good idea to limit deep-fried foods, baked sweets, ultra-processed foods, sugary drinks, refined grains, processed meats, artificial sweeteners, alcoholic drinks, and candy.

How long does it take to see results from 16 8 fasting? ›

Additionally, it will take your body a while to get used to this new eating schedule. So don't expect results right away. You may need to wait between 2 and 4 weeks to see or feel any results.

How many hours to fast for belly fat loss? ›

A person needs to decide on and adhere to a 12-hour fasting window every day. According to some researchers, fasting for 10–16 hours can cause the body to turn its fat stores into energy, which releases ketones into the bloodstream. This should encourage weight loss.

How long should I fast to get a flat belly? ›

Two popular intermittent fasting approaches include doing a 24-hour fast two to four times per week or a 16/8 fast, where you restrict your eating window to 8 hours each day, often by skipping breakfast or eating an early dinner.

What kind of fasting should I do to lose belly fat? ›

Alternate-Day Fasting

This is a popular approach for weight loss. In fact, research found that, in overweight adults, alternate-day fasting significantly reduced body mass index, weight, fat mass, and total cholesterol. You may be concerned about feeling hungry on fasting days. Research published by Dr.

Which type of intermittent fasting loses the most weight? ›

“For quicker and more profound weight loss, the alternate day fasting plan is arguably the most effective. A less-extreme and thus easier-to-adopt approach is the 16:8 model.

References

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