Can Eating Less Slow Aging? New Nature Aging Study Reveals the Truth

Today, I’m going to talk about a recent study published in Nature Aging that explores a simple but powerful question: Can eating less slow aging? In this study, researchers examined how two years of mild caloric restriction—about 14% fewer calories—affects aging in healthy adults using large-scale plasma proteomics. They found that caloric restriction significantly reshapes the blood proteome, shifting it toward a more youthful and healthier profile. It increased longevity-associated proteins like IGFBP2, improved metabolic markers, and reduced inflammatory proteins such as CRP and TNF. Importantly, caloric restriction also suppressed multiple hallmarks of aging, including inflammation, cellular senescence, and genomic instability. To understand which organs drive these changes, the researchers used a computational tool called “organage,” which estimates the biological age of specific organs based on plasma protein data. Interestingly, they found that caloric restriction reduced biological age mainly in adipose tissue, while having little effect on organs like the heart, muscle, and kidney—and even increasing age signals in the pancreas and intestine. Overall, this study suggests that caloric restriction can slow key biological processes of aging in humans, with fat tissue playing a central role.