A New Blood Test Uses 8 Amino Acids to Estimate Your Biological Age
Based on: Amino acid-based biological age clock and its implications for human health and aging.
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.
Key Insight
This study suggests amino acid levels may become a simple way to track biological aging in routine bloodwork.
Original Paper
Ding K, Xu R, Chao X, Li M, Sun T, Yang T, Zhu M, Peng X, Liu R, Luo P, Tian G, Lin Y, Xie G, Zheng X, Zhang L, Jia W, Chen T
Conflict of Interest Disclosure: Authors declare no competing interests.
Related Studies
New Trial Will Test Whether Taurine Improves Blood Sugar and Slows Aging
This is a protocol, not results, for a trial giving healthcare workers 3 grams of taurine daily for six months. Researchers want to see if it lowers HbA1c (a long-term blood sugar marker) and improves PhenoAge, a biological age estimate. The study uses a smart adaptive design that can stop early if taurine clearly works or clearly fails.
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.
Combining Wearables With Blood Proteins Sharpens Biological Age Tests
Researchers built a new biological age model that combines blood protein data with wearable device readings. It predicted mortality risk better than either tool alone and cut prediction error by 21%. The model also flagged common drugs like GLP-1 agonists and ACE inhibitors as linked to a younger biological age in specific organ systems.
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.
