While we all celebrate our birthdays every 12 months (our chronological age), it doesn't always match up with the rate at which our bodies are wearing out (our biological age). Scientists have now identified 10 different blood markers that can help spot the difference. We already have multiple ways to measure biological age , but there's a need to develop tests that are even more reliable and simpler to run. A blood test looking for specific biomarkers would fit that description. This work was