Calorie Cutting Improved Blood Markers Beyond Weight Loss Alone
Graded Moderate — data from seven trials with 829 people assigned by chance; the only outcome was an index of blood markers, not disease or lifespan.
- Design
- Meta-analysis
- Participants
- 829
- Duration
- —
- Funding
- Foundation for the National Institutes of Health
Cutting calories improved an index of blood markers, and weight loss accounted for only about half of that improvement.
In many lab animals, eating less extends life. Whether it also slows biological aging in people is still unclear. A new analysis of seven trials offers a clue. People chosen at random to cut calories ended up with better scores on an index built from six blood values. Weight loss explained only about half of that improvement.
The researchers combined data from 829 adults. In every trial, chance decided who would eat fewer calories. The index bundles inflammation markers such as CRP, insulin, a kidney marker and other blood values. It is meant to reflect biological aging. When the team accounted for weight loss, the effect of calorie cutting shrank but did not disappear. A further analysis put the share explained by weight loss at 48.5 percent, with wide uncertainty.
So eating less changed these blood values through more than lost pounds. Still, the study measured blood markers only, not illness or extra years of life. The authors see such indexes as a possible way to judge how people respond to a treatment.
Disclaimer: Research summaries are provided for informational purposes only and do not constitute medical advice. Always consult a qualified healthcare professional before making changes to your health routine.