New AI model can estimate a person's true biological age from five drops of blood

We all know someone who seems to defy aging—people who look younger than their peers despite being the same age. What's their secret? Scientists at Osaka University (Japan) may have found a way to quantify this difference. By incorporating hormone (steroid) metabolism pathways into an AI-driven model, they have developed a new system to estimate a person's biological age, a measure of how well their body has aged, rather than just counting the years since birth.

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