The Claim

Over a 10-day period, alternate-day fasting and continuous energy restriction both result in greater reductions in total body mass compared to an energy-balanced diet in middle-aged overweight men, with no difference in the magnitude of lean mass or fat mass loss between the two restriction methods.

Source: Short-term intermittent fasting and energy restriction do not impair rates of muscle protein synthesis: A randomised, controlled dietary intervention.

What the research says

Supports is higher

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

Supports
44score
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.

Cause and effect
1 study reviewed
In plain English

In middle-aged overweight men, eating fewer calories through alternate-day fasting or daily calorie restriction leads to more weight loss than eating a balanced amount of calories over 10 days, and both methods reduce fat and muscle mass by the same amount.

See the scientific wording

Over 10 days, both alternate-day fasting and continuous energy restriction reduce total body mass more than an energy-balanced diet in middle-aged overweight men, with similar reductions in both lean and fat mass across groups.

Why this might work

When fewer calories are consumed than the body needs, it starts breaking down both fat stores and muscle tissue to supply energy, and this happens the same way whether calories are cut every day or every other day.

Verified mechanismbased on 1 study

What the research says

1 study
  1. Study: Short-term intermittent fasting and energy restriction do not impair rates of muscle protein synthesis: A randomised, controlled dietary intervention.

    In overweight middle-aged men, eating fewer calories every day or skipping meals every other day both led to similar weight loss — and both caused similar drops in muscle and fat, unlike eating normally. The study confirms both diets work similarly for losing weight and body tissue.

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.