The Claim

All forms of intermittent fasting—including alternate day fasting, time-restricted eating, and whole-day fasting—reduce body weight by 1.7 to 3.4 kg compared with ad-libitum eating in adults with overweight or obesity, but these reductions are not significantly greater than those achieved with continuous energy restriction.

Source: Intermittent fasting strategies and their effects on body weight and other cardiometabolic risk factors: systematic review and network meta-analysis of randomised clinical trials

What the research says

Supports is higher

Support is ahead, but a single strong opposing study can change this.

Supports
53score
Challenges
0score

These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.

Quantitative
1 study reviewed
In plain English

In adults with overweight or obesity, intermittent fasting methods such as alternate day fasting, time-restricted eating, and whole-day fasting result in a weight loss of 1.7 to 3.4 kg compared to eating without restrictions, but this weight loss is not greater than what is achieved with continuous calorie restriction.

See the scientific wording

All forms of intermittent fasting—including alternate day fasting, time-restricted eating, and whole-day fasting—reduce body weight by 1.7 to 3.4 kg compared with ad-libitum eating in adults with overweight or obesity, but these reductions are not significantly greater than those achieved with continuous energy restriction.

Why this might work

When food intake is limited for periods of time, the body uses stored fat for energy because there isn't enough incoming fuel. This burns fat tissue, leading to weight loss. The amount of weight lost is the same as when people eat fewer calories every day because the total energy used over time is what matters, not when the food is eaten.

Verified mechanismbased on 1 study

What the research says

1 study

  1. Study: Intermittent fasting strategies and their effects on body weight and other cardiometabolic risk factors: systematic review and network meta-analysis of randomised clinical trials

    All kinds of intermittent fasting help people lose a little weight compared to eating however much they want, but they don’t help people lose more than just eating fewer calories every day — and after six months, the differences vanish.

Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies

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Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.