{
  "id": 5383737,
  "title": "Healthy aging shaped by more varied biology than previously thought",
  "url": "https://urgent.news/2026/09/03/healthy-aging-shaped-by-more-varied-biology-than-previously-thought",
  "topic": "science",
  "section": "Science",
  "published": "2026-09-03T18:00:14.000Z",
  "source": {
    "name": "Medical Xpress",
    "slug": "medical-xpress",
    "url": "https://medicalxpress.com/news/2026-09-healthy-aging-varied-biology-previously.html"
  },
  "original_language": "en",
  "account": "A new study led by researchers at King's College London has revealed that individual aging trajectories are far more diverse than previously understood. The research, published in Science, observed how genetic factors and environmental influences continually interact across a person's lifespan, resulting in distinct biological aging journeys for healthy individuals of the same age.\n\nThe study, the most comprehensive molecular study of aging to date, examined the molecular changes in 335 participants from the TwinsUK cohort over an eight-year period. By analyzing blood RNA levels, the activity of over 16,000 genes, and hundreds of metabolites, the researchers found that molecular changes were not uniform across the immune system. Innate immune cells, which are the first line of defense present at birth, exhibited different molecular changes compared to adaptive immunity, which builds memory over time.\n\nOne notable finding was the varying levels of the tumor suppressor gene tumor protein p53 (TP53) among participants as they aged, which could alter their risk of cancer. Additionally, the study observed correlations between environmental exposures, such as shifting blood levels of PFAS (perfluoroalkyl substances), commonly known as \"forever chemicals,\" and evolving molecular profiles over time. This highlights the impact of public health measures targeting environmental risks on the molecular level.\n\nDr. Julia El-Sayed Moustafa, a research fellow at King's College London and the study's first author, stated, \"Rather than there being a single molecular roadmap of aging, our study shows that people follow distinct biological journeys. Two healthy people of the same age can be aging in surprisingly different ways at the molecular level, raising the possibility of more personalized approaches to predicting disease risk and maintaining health as we grow older.\"\n\nProfessor Kerrin Small, a professor in genomics at King's College London, added, \"Our findings suggest that human aging at the molecular level is not a uniform process, but one that is dynamic and environment-dependent. Understanding individual molecular aging trajectories may help distinguish healthy aging from the earliest stages of disease and identify opportunities for earlier, more personalized interventions, potentially paving the way for precision medicine.\"",
  "summary": "Molecular changes in aging are far more unique than previously thought, meaning two healthy individuals of identical age can experience significantly different aging journeys.",
  "key_points": [],
  "editors_take": null,
  "illustration": null,
  "coverage": {
    "outlets": 1,
    "also_reported_by": []
  },
  "ai_generated": true,
  "disclaimer": "Summaries, key points and the editor’s take are written by software from other outlets’ reporting and may contain errors — always check the linked original."
}