Amino acid age clock linked to frailty and disease in people
The model’s age estimates differed from actual ages by an average of 7.53 years in an internal test of 1,130 people.
Limit: The study did not measure health benefits from clock-guided care
Edited by Boris Djordjevic · AgingResearch.News
In an observational study, researchers developed and tested AmiAge using data from 5,659 healthy male and female participants aged 1 to 89. The model estimated age from levels of 18 amino acids, the building blocks of proteins, and their relative proportions. Across nine studies, the researchers assessed the clock using over 11,000 in-house and more than 270,000 publicly available samples.
They also developed a simpler version using eight amino acids. In 272,383 UK Biobank participants, higher age estimates relative to actual age were associated with greater frailty, shorter telomeres—the protective ends of chromosomes—and weaker grip strength. Higher gaps were also linked to new cases of age-related diseases. Associations with type 2 diabetes and chronic kidney disease remained after adjustment for other measured factors.
Why it matters
The authors suggest that amino acid measurements may complement existing biological aging measures in personalized health management and aging research.
Caveats
These observational associations do not establish cause and effect. The study did not test whether using the clock to guide health decisions improves outcomes.
The paper
Amino acid-based biological age clock and its implications for human health and aging
Shanghai Jiao Tong University; Donghua University
Nature Communications, May 22, 2026, Open access
