Epigenetic clocks are a type of biological age estimation that relies on epigenetic modifications to DNA, rather than chronological age, to predict an individual's age. These clocks are based on the idea that changes in DNA methylation patterns across the genome are a reflection of aging processes and can be used to estimate biological age. Epigenetic clocks have been developed for a variety of tissues and cell types, and have shown promise as a tool for predicting health outcomes and age-related diseases. Research in this area aims to improve the accuracy and utility of epigenetic clocks for understanding the aging process and developing targeted interventions to promote healthy aging.