The Claim

Intermittent fasting regimens including alternate-day fasting, 5:2 fasting, and time-restricted eating produce comparable weight loss outcomes with no statistically significant differences between them, as demonstrated in a meta-analysis of 24 randomized controlled trials involving 1,768 adults.

Source: A meta‐analysis comparing the effectiveness of alternate day fasting, the 5:2 diet, and time‐restricted eating for weight loss

What the research says

Supports is higher

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

Supports
67score
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.

Description
1 study reviewed
In plain English

Among adults, intermittent fasting methods such as alternate-day fasting, 5:2 fasting, and time-restricted eating result in the same amount of weight loss, with no meaningful difference between them.

See the scientific wording

Intermittent fasting regimens (ADF, 5:2, TRE) result in comparable weight loss to each other, with no statistically significant differences observed between them in a meta-analysis of 24 randomized trials involving 1768 adults.

Why this might work

When a person eats, the body stores excess energy as fat. When they stop eating, the body switches to burning stored fat for energy. This back-and-forth between storing and burning fat happens the same way no matter when or how often the person eats, so all types of intermittent fasting lead to similar amounts of fat loss.

Supported mechanismbased on 1 study

What the research says

1 study
  1. Study: A meta‐analysis comparing the effectiveness of alternate day fasting, the 5:2 diet, and time‐restricted eating for weight loss

    The study found that alternate day fasting, the 5:2 diet, and time-restricted eating all led to about the same amount of weight loss — none was clearly better than the others.

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

Fit Body Science verdict — we translate health claims into clear verdicts backed by peer-reviewed research.

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