DNA Age Check: New Pakistani Study Finds Reliable Markers

The team studied how tiny changes in DNA can reveal a person’s real age. They focused on seven specific spots, called CpG sites, that change as we grow older. The research used blood samples from 181 people ranging from a baby to a 76‑year‑old. Using a quick test called SNaPshot™, the scientists measured how much each of those seven spots was turned on or off. They then built three different mathematical recipes to guess age from the DNA data: stepwise regression, multivariate linear regression (MVLR), and support vector machine (SVM). All three methods performed well, with the SVM giving the smallest average error of about 3. 4 years on new samples that hadn’t been used in building the models. The other two were close behind, with errors around 3. 6–3. 7 years. When the models were tested on an independent group of 53 people, their accuracy stayed strong. About 70–77% of the predictions were within four years of the person’s true age, showing that the models are reliable.

Of the seven DNA spots studied, two stood out as the most useful for age prediction in Pakistan: ELOVL2 and FHL2. They showed strong age links and didn’t overlap too much with the other spots, making them good choices for future tools. One spot, CCDC102B, was less helpful and might be dropped in later studies. The researchers noticed a trend: the older people got, the harder it was to predict their age accurately. They think this could be because things like pollution or diet change how DNA ages, especially in places with high air quality problems. To make these tools practical for real crime scenes, more work is needed. Scientists plan to test the models on other body fluids—like saliva or tiny blood stains—and with larger, more diverse groups. They also want to explore how environmental factors shift DNA aging so the math can stay accurate for everyone.

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