Start Here

What Is Ageing, Scientifically?

In biology and medicine, ageing refers to a set of gradual, progressive changes that occur over time in living organisms. These changes increase vulnerability to disease, functional decline, and mortality, but ageing itself is not classified as a disease.

Ageing is best understood as a process rather than a single mechanism. It involves interacting changes across multiple levels of organization — including molecular, cellular, tissue, and systemic levels — which together influence health, resilience, and function over the lifespan.

Importantly, ageing does not occur at the same rate in all individuals or across all biological systems. This variability is a central focus of modern gerontology and longevity research.

What This Site Covers — and What It Does Not

Starlight Longevity is an educational resource focused on explaining the science of ageing and healthspan using peer-reviewed research. We summarize established knowledge, emerging findings, and areas of ongoing uncertainty.

This site does not provide medical advice, diagnoses, or treatment recommendations. We do not promote protocols, supplements, or interventions.