If you eat only during certain hours of the day or just count your calories, you’ll lose about the same amount of weight—roughly 4.5% of your body weight—after six months.

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Pro

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Against

Evidence from Studies

Supporting (1)

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Community contributions welcome

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Time-Restricted Eating Without Calorie Counting for Weight Loss in a Racially Diverse Population

Randomized Controlled Trial

Human

2023 Jul

The study found that people who only ate during an 8-hour window lost about the same amount of weight as people who counted calories, even though they didn’t count calories at all. So yes, both methods work about equally well.

Contradicting (1)

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Community contributions welcome

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Calorie Restriction with or without Time-Restricted Eating in Weight Loss.

Randomized Controlled Trial

Human

2022 Apr 21

The study compared two ways of eating: one where people ate only during the day and cut calories, and another where they just cut calories anytime. Both lost weight, but the claim says time-restricted eating alone equals calorie counting — this study didn’t test that because both groups cut calories.

Gold Standard Evidence Needed

According to GRADE and EBM methodology, here is what ideal scientific evidence would look like to definitively prove or disprove this specific claim, ordered from strongest to weakest evidence.

Similar Assertions

If you eat only between noon and 8 p.m. without counting calories, you’ll lose about the same amount of weight over a year as someone who cuts their daily calories by 25%—the difference is so small it could just be due to chance.

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85%

If obese people eat only during a certain window each day without counting calories, they naturally eat about 425 fewer calories a day over a year, which helps them lose weight—even though no one told them to eat less.

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81%

If obese people only eat between noon and 8 p.m. every day—without counting calories—they tend to lose about 4.6 kg (over 10 pounds) in a year, just by changing when they eat, and not by eating less.

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80%

People who are obese and eat only during an 8-hour window each day—without counting calories—stick to this routine 87% of the time for a full year, which suggests it’s a practical way to manage weight long-term.

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75%

If you're overweight and eat only between 8 a.m. and 4 p.m. for a year, you’ll lose about 8 kg — but if you just eat fewer calories without worrying about when you eat, you’ll lose about 6.3 kg. The difference is so small that it doesn’t really matter which method you pick — cutting calories is what matters most.

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74%