Research

Energy balance

Time-restricted feeding (TRF) with an 8-hour eating window (16:8) produces moderate weight loss in individuals with overweight or obesity, with effects potentially exceeding 5% of initial body weight when combined with caloric restriction.

If you have excess weight, try eating all your meals within an 8-hour window each day (e.g., 12 PM to 8 PM). You do not need to count calories if you are not used to it, but you must stop eating after your chosen end time. If you want faster results, combine this with a modest calorie reduction. Expect moderate weight loss, potentially over 5% of your body weight if you also restrict calories.

GoodSupportsHIGH confidence
TRF may result in moderate weight loss in individuals with overweight/obesity; when TRF is combined with caloric restriction, weight loss is >5% of the initial body weight
Sofia Tsitsou et al. · Nutrients · 2022

Why this rating

Based on a systematic review of 24 RCTs, though some studies had bias concerns regarding randomization.

Source

Effects of Time-Restricted Feeding and Ramadan Fasting on Body Weight, Body Composition, Glucose Responses, and Insulin Resistance: A Systematic Review of Randomized Controlled Trials

Sofia Tsitsou et al. · Nutrients · 2022

DOI 10.3390/nu14224778

systematic_reviewCited 53×
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DOI resolved against Crossref · corpus check 2026-06-10

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