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Journal ArticleNature communications·May 2026

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

Key Insight

This study suggests amino acid levels may become a simple way to track biological aging in routine bloodwork.


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.

Conflict of Interest Disclosure: Authors declare no competing interests.

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.