Tracking Your 'Biological Age' Over Time May Predict Death Risk Better Than a Single Snapshot

Moderate Evidence·GeroScience·Apr 2026

In over 90,000 Dutch adults followed for nearly 14 years, people whose biological age ran ahead of their calendar age had a higher risk of dying. More importantly, among 25,000 people measured twice, those whose biological age sped up over time faced even greater risk. People stuck in a pattern of accelerated aging had a 39% higher mortality risk compared to those aging at a normal pace. The results suggest that checking biological age once might not be enough.

Key Insight

This study suggests monitoring biological age over time could be more informative than a one-time measurement.

Original Paper

GeroScience··90,632 adults (25,752 with repeat measures); median follow-up 13.8 years

Related Studies

biological age

A New Blood Test Uses 8 Amino Acids to Estimate Your Biological Age

Scientists built a tool called AmiAge that estimates how old your body really is by measuring 18 amino acids in your blood. They then simplified it down to just 8 amino acids. People whose AmiAge was higher than their actual age tended to be frailer, had shorter telomeres, and got age-related diseases more often.

Nature communications·Moderate·May 22, 2026
circadian rhythm

Strong Daily Rhythms Plus Exercise Cut Death Risk by Two-Thirds

Adults whose sleep-wake cycles followed a strong daily rhythm and who got enough exercise had a 65% lower risk of dying from any cause over about 7 years. The combo also slashed cardiovascular death risk by 75%. Part of the benefit seemed to come from slower biological aging, hinting that consistent routines matter as much as the workout itself.

The journals of gerontology. Series A, Biological sciences and medical sciences·Moderate·May 21, 2026
NAD+

Blood NAD+ Levels Stay Flat With Age, Challenging Popular Aging Theory

One of the most repeated ideas in longevity is that NAD+ declines as we age, a story that helped make NR and NMN household names in the space. This large, carefully controlled study takes a closer look. Across seven independent cohorts and more than 300 people, researchers found that whole-blood NAD+ levels stayed remarkably stable with age, and didn't shift meaningfully in response to exercise, protein-rich diets, or multimodal lifestyle interventions in older adults. Importantly, NR supplementation did raise blood NAD+ as expected, confirming that the supplements work pharmacologically, the question is just whether blood NAD+ is the right thing to be measuring in the first place.

Nature metabolism·Strong·May 14, 2026

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.