The Claim
Six months of 15% and 35% caloric restriction is associated with improved sperm motility (50.0-56.6%) in 12-month-old male Wistar rats compared to controls (43.8%), with benefits maintained at 12 months (40.2-43.0% vs 25.3% in controls).
What the research says
Challenges is higher
Challenge is ahead, but a single strong supporting 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.
Eating less food for six months helped older male rats have better swimming sperm, and this improvement lasted for a year compared to rats that ate normally.
See the scientific wording
Six months of 15% and 35% caloric restriction is associated with improved sperm motility (50.0-56.6%) in 12-month-old male Wistar rats compared to controls (43.8%), with benefits maintained at 12 months (40.2-43.0% vs 25.3% in controls).
What the research says
1 studyStudy: Effect of Chronic Moderate Caloric Restriction on the Reproductive Function in Aged Male Wistar Rats
The study says the good effects on sperm movement didn't last for a full year, but the claim says they did, so the study contradicts the claim.
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.