old age without cancer suggests that your cellular defense mechanisms are still effective. Your body continues to recognize and neutralize internal threats.
This is often linked to lower chronic inflammation, better stress management, and healthier long-term habits.
5. Chronic lung disease
The lungs supply oxygen to every organ. When they weaken, the heart, brain, and immune system also suffer.
If you can breathe deeply, walk without constant shortness of breath, and avoid persistent coughs or frequent respiratory infections, your lungs are likely still strong internally.
Healthy lungs support better sleep,
