Cellular theory of disease

The cellular theory of disease states that illnesses originate at the cellular level, meaning that harmful changes or damage within individual cells cause symptoms and health problems. Cells are the basic units of life, and when they become injured or dysfunctional—due to infection, injury, or genetic issues—they disrupt normal body functions. This cellular malfunction can lead to tissue damage, organ problems, and overall illness. Understanding this helps in diagnosing, preventing, and treating diseases by targeting cellular health and addressing the root causes at the cellular level.