Cellular aging, also known as cellular senescence, refers to the gradual deterioration of cell function and viability over time. This process is influenced by various factors, including oxidative stress, telomere shortening, and genetic damage. As cells age, they become less efficient at repairing DNA, synthesizing proteins, and maintaining homeostasis. Cellular aging has profound implications for health, contributing to the development of age-related diseases such as cancer, neurodegenerative disorders, and cardiovascular diseases, making it a critical area of study in aging research.