Can You Lose Weight Eating Just One Meal A Day
Eating one meal a day is a type of intermittent fasting that restricts calorie consumption during a certain window of time. It may support weight loss and provide other health benefits.
Eating one meal a day is a practice that many people swear by to lose weight and improve overall health. The one-meal-per-day diet is also referred to as OMAD.

Although the content and timing of the meal will vary based on personal preference, people following an OMAD diet typically restrict their calorie intake to a single meal or a short window of time.
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The potential health benefits of OMAD are primarily related to fasting — restricting calorie intake during a set time period — and calorie restriction in general.
Examples include having just one meal and fasting for the rest of the day or having one meal and eating limited amounts of food during fasting periods.
Other health benefits related to fasting include the potential to reduce heart disease risk factors, decrease blood sugar, and reduce inflammation (
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However, compared to other fasting regimens, such as the 16/8 method, which involves 8-hour eating windows and 16-hour fasting windows, eating just one meal per day is one of the most extreme methods of intermittent fasting.
A few popular diets encourage eating one meal per day. For example, when following the Warrior Diet, a person eats a single meal a day, cycling between long periods of fasting with short periods of energy consumption.
Most people following OMAD choose to only consume dinner, although others choose breakfast or lunch as their one meal. Some versions of this eating pattern allow a snack or two in addition to the one meal.
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However, some OMAD enthusiasts don’t consume anything containing calories during their fasting window and only consume calories during their chosen meal, which typically lasts an hour or so.
You can do this by either increasing the number of calories you burn or reducing your calorie intake. Calorie restriction, no matter how you achieve it, will lead to fat loss.
People using the OMAD method are likely to lose weight simply because they’re taking in fewer overall calories than they normally would during a regular pattern of eating.
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For example, a study in healthy adults found that restricting calorie intake to a 4-hour time period in the evening led to significantly greater body fat loss than when eating three separate meals throughout the day (
However, it doesn’t seem to be any more effective than traditional methods of calorie restriction, such as reducing calorie intake at each meal (
An analysis that included 50, 660 people showed that those who consumed 1 or 2 meals per day had a yearly reduction in body mass index (BMI) compared to those who consumed 3 meals per day.
One Meal A Day ( Omad) For Weight Loss
The study also showed that an overnight fast of 18 or more hours was associated with decreased body weight, compared to shorter fasting windows (
Plus, extreme methods of fasting, such as OMAD, may have side effects that people need to consider, such as increased hunger and problematic metabolic changes (
In addition to weight loss, research has linked fasting to a number of other health benefits. For example, fasting may help reduce blood sugar and certain heart disease risk factors, including LDL “bad” cholesterol (
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Additionally, fasting may offer unique benefits for the health of the nervous system. It may slow neurodegeneration and promote longevity, according to animal research (
However, although these potential benefits are promising, it’s important to note that these benefits are associated with fasting in general and not OMAD specifically.

In fact, some research shows that the OMAD pattern may be more detrimental to health than other, less restrictive fasting methods (
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Although research has associated fasting and calorie restriction with a variety of health benefits, some evidence suggests that restricting too much — which can include only consuming one meal a day — may do more harm than good.
For example, studies suggest that this extreme restriction may lead to increased total and LDL “bad” cholesterol and higher blood pressure levels compared to normal eating patterns or less extreme fasting methods (
Other studies have shown that eating one meal per day may increase fasting blood sugar levels, delay the body’s response to insulin, and increase levels of the appetite-stimulating hormone ghrelin, compared to eating 3 meals per day.
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What’s more, restricting calories to one meal a day may increase the chances of hypoglycemia, or low blood sugar, especially in those with type 2 diabetes (
The OMAD diet is also not appropriate for many groups of people, including those who are pregnant or breastfeeding, children and teens, older adults, and people with eating disorders.
Limiting intake to one meal per day can also lead to disordered eating tendencies, impact a person’s social life, and be extremely difficult for most people to stick to.
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What’s more, it can be very difficult to take in enough nutrients in one meal. This can lead to nutrient deficiencies, which can negatively affect your health and can lead to serious risks.
Lastly, some people following the OMAD dietary pattern will binge on highly processed, calorie-dense foods, like fast food, pizza, doughnuts, and ice cream, during their one meal.

While these foods can fit into a balanced lifestyle, exclusively eating foods high in added sugar and other unhealthful ingredients will negatively affect your health in the long run.
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Overall, although there are benefits related to fasting and calorie restriction, research has shown that consuming 2 or 3 meals per day is likely a better option for overall health than eating one meal a day (
Although most health professionals would not recommend eating only one meal a day, if you do choose this eating pattern, it’s essential to ensure that you’re consuming a variety of nutritious foods, including:
In the strict OMAD diet, this means complete restriction of calories. You can still enjoy water and other noncaloric beverages in fasting periods.
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Eating one meal a day is unlikely to give you the calories and nutrients your body needs to thrive unless carefully planned. Choosing to eat within a longer time period may help you increase your nutrient intake.
Most people follow the OMAD pattern a few days a week, cycling it in with a normal dietary pattern or a less restrictive intermittent fasting regimen, like the 16/8 method.
If eating one meal a day, try to make meals as nutrient-dense as possible. These meals should deliver at least 1, 200 calories, which can be difficult for some to ingest over a normal meal window.
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If you struggle to take in enough calories in one meal, consider increasing your eating window by an hour or so and splitting your meal into two smaller meals. This can help you get enough nutrients and calories without becoming overly full.
Here are some nutritionally complete meal ideas that are likely to exceed 1, 200 calories, as long as portion sizes are large enough:
Keep in mind that this way of eating is much more difficult for those following specific dietary patterns, like vegan diets or low fat diets, due to the number of calories that must fit into a single meal.
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Overall, trying to cram all of your calorie needs into one meal is not necessary no matter what your health goal is. This dietary pattern is also not sustainable or practical for most people.
Eating one meal a day may be a popular way to lose weight, but it’s likely not a good idea for overall health.
Although fasting in general — including prolonged fasting — may benefit health in a number of ways, people can reach the same health benefits using much more sustainable methods.
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More sustainable diets include 16/8 intermittent fasting or simply following a healthful, lower-calorie diet if you’re currently eating in a surplus and want to promote weight loss.The one meal a day (OMAD) diet is a type of intermittent fasting. With OMAD you can eat what you want, but you go without food for longer than with other types of fasting.
When I started researching the One Meal a Day Diet (sometimes referred to OMAD), it was the simplicity that drew me to the plan: You eat one meal per day, consisting of whatever you want, typically at your regular dinnertime.
However, the OMAD is really just an extreme variant of intermittent fasting or a more hardcore cousin of the Warrior Diet. The difference between OMAD and traditional fasting is instead of fasting for the typical window, like 16 hours, you fast for about 23 hours (including the time you spend sleeping).
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While the premise sounds a little shady, like a dietary supplement being hawked by a “doctor” on a late-night infomercial, let’s explore the reasoning — and science — on both sides of the debate before we totally write it off.
Most people cringe at the thought of missing a single meal. Intentionally missing all but one meal, every day, seems excessive and unnecessary. But proponents of OMAD claim a multitude of benefits, including:

Some follow this eating pattern for religious reasons. But others, including prominent pro athletes like Ronda Rousey and Herschel Walker, voluntarily eat once a day for the long term. Walker claims to have been eating one meal
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