The Claim
Alternate-day fasting without net energy restriction does not significantly reduce body mass or fat mass in lean adults over a 3-week period.
What the research says
Supports is higher
Support is ahead, but a single strong opposing study can change this.
These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.
In lean adults, fasting every other day without eating fewer calories overall does not lead to a reduction in body weight or fat mass after three weeks.
See the scientific wording
Alternate-day fasting without net energy restriction does not significantly reduce body mass or fat mass in lean adults over a 3-week period, indicating that fasting alone, without calorie reduction, is ineffective for fat loss.
When meals are skipped on fasting days, the body responds by increasing hunger and food intake on eating days, so total calorie intake stays the same. Because no extra calories are burned or stored as fat, body mass and fat mass do not change.
What the research says
1 studyWhen people skipped meals every other day but ate even more on the days they did eat (so they didn’t cut total calories), they didn’t lose any fat. This shows that just skipping meals doesn’t help you lose fat unless you eat fewer calories overall.
Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.