How fast can you lose weight fasting?

According to a 2014 review, intermittent fasting reduced body weight by 3–8% over a period of 3–24 weeks (22). When examining the rate of weight loss, intermittent fasting may produce weight loss at a rate of approximately 0.55 to 1.65 pounds (0.25–0.75 kg) per week (23).

healthline.com - How Intermittent Fasting Can Help You Lose Weight - Healthline

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This article explores everything you need to know about intermittent fasting and weight loss. Most people understand intermittent fasting as a weight loss intervention. Fasting for short periods of time helps people eat fewer calories, which may result in weight loss over time ( 1 ). Intermittent fasting is an eating pattern that involves regular, short-term fasts — or periods of minimal or no food consumption. One strategy that has become popular in recent years is called intermittent fasting ( 1 ).

There are many different ways to lose weight.

There are several different intermittent fasting methods. The most popular ones include:

the 16:8 method

the 5:2 diet

the Warrior diet

Eat Stop Eat

All methods can be effective, but figuring out which one works best depends on the individual. To help you choose the method that fits your lifestyle, here’s a breakdown of the pros and cons of each.

The 16/8 method

The 16/8 intermittent fasting plan is one of the most popular styles of fasting for weight loss. The plan restricts food consumption and calorie-containing beverages to a set window of 8 hours per day. It requires abstaining from food for the remaining 16 hours of the day. While other diets can set strict rules and regulations, the 16/8 method is based on a time-restricted feeding (TRF) model and more flexible.

You can choose any 8-hour window to consume calories.

Some people opt to skip breakfast and eat from noon to 8 p.m., while others avoid eating late and stick to a 9 a.m. to 5 p.m. schedule. Limiting the number of hours that you can eat during the day may help you lose weight and lower your blood pressure. Research indicates that time-restricted feeding patterns such as the 16/8 method may prevent hypertension and reduce the amount of food consumed, leading to weight loss ( 6 ). A 2016 study found that when combined with resistance training, the 16/8 method helped decreased fat mass and maintain muscle mass in male participants ( 7 ). A more recent study found that the 16/8 method did not impair gains in muscle or strength in women performing resistance training ( 8 ). While the 16/8 method can easily fit into any lifestyle, some people may find it challenging to avoid eating for 16 hours straight. Be sure to eat a balanced diet comprising fruits, vegetables, whole grains, healthy fats, and protein to maximize the potential health benefits of this diet.

The 5:2 method

The 5:2 diet is a straightforward intermittent fasting plan.

Five days per week, you eat normally and don’t restrict calories. Then, on the other two days of the week, you reduce your calorie intake to one-quarter of your daily needs. For someone who regularly consumes 2,000 calories per day, this would mean reducing their calorie intake to just 500 calories per day, two days per week.

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According to a 2018 study , the 5:2 diet is just as effective as daily calorie restriction for weight loss and blood glucose control among those with type 2 diabetes. Another study found that the 5:2 diet was just as effective as continuous calorie restriction for both weight loss and the prevention of metabolic diseases like heart disease and diabetes ( 9 ). The 5:2 diet provides flexibility, as you get to pick which days you fast, and there are no rules regarding what or when to eat on full-calorie days. That said, it’s worth mentioning that eating “normally” on full-calorie days does not give you a free pass to eat whatever you want. Restricting yourself to just 500 calories per day isn’t easy, even if it’s only for two days per week. Plus, consuming too few calories may make you feel ill or faint. The 5:2 diet can be effective, but it’s not for everyone. Talk to your doctor to see if the 5:2 diet may be right for you.

Eat Stop Eat

Eat Stop Eat is an unconventional approach to intermittent fasting popularized by Brad Pilon, author of the book “Eat Stop Eat.” This intermittent fasting plan involves identifying one or two non-consecutive days per week during which you abstain from eating, or fast, for a 24-hour period. During the remaining days of the week, you can eat freely, but it’s recommended to eat a well-rounded diet and avoid overconsumption. The rationale behind a weekly 24-hour fast is that consuming fewer calories will lead to weight loss. Fasting for up to 24 hours can lead to a metabolic shift that causes your body to use fat as an energy source instead of glucose ( 10 ). But avoiding food for 24 hours at a time requires a lot of willpower and may lead to binging and overconsumption later on. It may also lead to disordered eating patterns. More research is needed regarding the Eat Stop Eat diet to determine its potential health benefits and weight loss properties. Talk to your doctor before trying Eat Stop Eat to see if it may be an effective weight loss solution for you.

Alternate-day fasting

Alternate-day fasting is an intermittent fasting plan with an easy-to-remember structure. On this diet, you fast every other day but can eat whatever you want on the non-fasting days. Some versions of this diet embrace a “modified” fasting strategy that involves eating around 500 calories on fasting days. However, other versions eliminate calories altogether on fasting days.

Alternate-day fasting has proven weight loss benefits.

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A randomized pilot study comparing alternate-day fasting to a daily caloric restriction in adults with obesity found both methods to be equally effective for weight loss ( 11 ). Another study found that participants consumed 35% fewer calories and lost an average of 7.7 pounds (3.5 kg) after alternating between 36 hours of fasting and 12 hours of unlimited eating over 4 weeks (12). If you really want to maximize weight loss, adding an exercise regime to your life can help. Research shows that combining alternate-day fasting with endurance exercise may cause twice as much weight loss than simply fasting ( 13 ). A full fast every other day can be extreme, especially if you’re new to fasting. Overeating on non-fasting days can also be tempting. If you’re new to intermittent fasting, ease into alternate-day fasting with a modified fasting plan. Whether you start with a modified fasting plan or full fast, it’s best to maintain a nutritious diet, incorporating high protein foods and low calorie vegetables to help you feel full.

The Warrior diet

The Warrior Diet is an intermittent fasting plan based on the eating patterns of ancient warriors. Created in 2001 by Ori Hofmekler, the Warrior Diet is a bit more extreme than the 16:8 method but less restrictive than the Eat Fast Eat method. It consists of eating very little for 20 hours during the day, and then eating as much food as desired throughout a 4-hour window at night. The Warrior Diet encourages dieters to consume small amounts of dairy products, hard-boiled eggs, and raw fruits and vegetables, as well as non-calorie fluids during the 20-hour fast period. After this 20-hour fast, people can essentially eat anything they want for a 4-hour window, but unprocessed, healthy, and organic foods are recommended. While there’s no research on the Warrior Diet specifically, human studies indicate that time-restricted feeding cycles can lead to weight loss ( 14 ). Time-restricted feeding cycles may have a variety of other health benefits. Studies show that time-restricted feeding cycles can prevent diabetes, slow tumor progression, delay aging, and increase lifespan in rodents ( 15 , 16 ). More research is needed on the Warrior Diet to fully understand its benefits for weight loss. The Warrior Diet may be difficult to follow, as it restricts substantial calorie consumption to just 4 hours per day. Overconsumption at night is a common challenge. The Warrior Diet may also lead to disordered eating patterns. If you feel up for the challenge, talk to your doctor to see whether it’s right for you.

healthline.com - How Intermittent Fasting Can Help You Lose Weight - Healthline

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