We Don’t Die of Old Age, But Specific Diseases

Scientists from teh German Center for neurodegenerative Diseases are challenging how we think about aging. They argue we don’t die of “old age” – a vague, inevitable process. Instead,specific diseases always cause death. And that realization could pave the way for longer lives, if we address those diseases effectively.

The researchers analyzed autopsy reports from people who lived past 100. Even those who appeared ‘healthy’ until the end had a clear illness listed as the cause of death. In humans, cardiovascular diseases are the leading cause, responsible for 35 to 70 percent of deaths. Cancer, stroke, and lung diseases like COPD are also common killers.

This pattern holds true for animals, too. In mice and rats, cancer is the biggest threat, accounting for 63 to 86 percent of deaths. Fruit flies frequently enough succumb to intestinal problems, while roundworms (C. elegans) frequently die from throat issues. Why does this matter? It demonstrates that ‘aging’ isn’t a universal process. Each species has its own vulnerabilities.

Dan Ehninger, a co-author of the study, explained to Scientias.nl why this shifts our perspective on extending lifespan. “A species’ lifespan mainly reflects when its major causes of death occur,not as of a universal aging programme. So,if a treatment extends a mouse’s life by preventing cancer,it tells us a lot about mouse tumors,but not much about aging in general. To truly understand aging, we need to study its components directly, and we can’t rely on lifespan as a simple indicator.”

Aging Itself Isn’t the Target

What does this mean for popular anti-aging drugs or widely shared studies? The researchers are skeptical. Many of these treatments don’t slow aging itself; they simply delay specific diseases. Ehninger explains, “You can increase lifespan by postponing a particular life-limiting illness without actually changing the overall aging process. For example, rapamycin (a drug that extends the lives of mice) and other interventions have been shown to make mice live longer, but detailed analysis reveals that many aging characteristics don’t improve or change in both young and old animals. This suggests delayed cancer advancement, rather than a general slowdown of aging.”

This mirrors what’s happened with human lifespans in the last century. Our life expectancy has increased, but primarily because we’ve gotten better at treating and preventing diseases like infectious illnesses and heart disease. We haven’t fundamentally altered the aging process itself.