Autophagy is a conserved lysosomal degradation pathway that maintains cellular homeostasis by eliminating protein aggregates and damaged organelles. It plays a critical role in various diseases, including metabolic disorders, neurodegenerative diseases, cancers, and infectious diseases. This review discusses the mechanisms and regulation of autophagy, its role in disease, and potential therapeutic strategies for modulating autophagy. Autophagy is initiated by the formation of double-membrane autophagosomes, which engulf cytoplasmic material and deliver it to lysosomes for degradation. The process is regulated by various signaling pathways, including the mTOR pathway, which inhibits autophagy under nutrient-rich conditions. Starvation and other stress conditions activate autophagy, which helps cells adapt to metabolic stress and prevent apoptosis. Autophagy is also essential during development and differentiation, as it helps clear cellular components and promote tissue remodeling. Autophagy is involved in various diseases, including metabolic disorders, neurodegenerative diseases, and cancer. In metabolic diseases, autophagy helps maintain glucose homeostasis and lipid metabolism. In neurodegenerative diseases, autophagy is crucial for clearing toxic protein aggregates and preventing neuronal death. In cancer, autophagy can act as a tumor suppressor or a pro-survival mechanism, depending on the context. Autophagy inhibition has been explored as a potential therapeutic strategy for certain cancers, while autophagy activation may be beneficial in neurodegenerative diseases. Pharmacological approaches to modulate autophagy are being investigated for their therapeutic potential. Autophagy activators, such as AMPK activators and certain drugs, may be beneficial in metabolic and neurodegenerative diseases. Autophagy inhibitors, such as rapamycin and chloroquine, are being tested in cancer therapy to enhance the effectiveness of chemotherapeutic agents. However, the long-term safety and efficacy of these approaches need to be carefully evaluated. The review highlights the complex roles of autophagy in various diseases and the need for further research to develop targeted therapies that modulate autophagy in a safe and effective manner. The potential of autophagy as a therapeutic target is promising, but challenges remain in understanding the precise mechanisms and ensuring the safety of autophagy-modulating drugs.Autophagy is a conserved lysosomal degradation pathway that maintains cellular homeostasis by eliminating protein aggregates and damaged organelles. It plays a critical role in various diseases, including metabolic disorders, neurodegenerative diseases, cancers, and infectious diseases. This review discusses the mechanisms and regulation of autophagy, its role in disease, and potential therapeutic strategies for modulating autophagy. Autophagy is initiated by the formation of double-membrane autophagosomes, which engulf cytoplasmic material and deliver it to lysosomes for degradation. The process is regulated by various signaling pathways, including the mTOR pathway, which inhibits autophagy under nutrient-rich conditions. Starvation and other stress conditions activate autophagy, which helps cells adapt to metabolic stress and prevent apoptosis. Autophagy is also essential during development and differentiation, as it helps clear cellular components and promote tissue remodeling. Autophagy is involved in various diseases, including metabolic disorders, neurodegenerative diseases, and cancer. In metabolic diseases, autophagy helps maintain glucose homeostasis and lipid metabolism. In neurodegenerative diseases, autophagy is crucial for clearing toxic protein aggregates and preventing neuronal death. In cancer, autophagy can act as a tumor suppressor or a pro-survival mechanism, depending on the context. Autophagy inhibition has been explored as a potential therapeutic strategy for certain cancers, while autophagy activation may be beneficial in neurodegenerative diseases. Pharmacological approaches to modulate autophagy are being investigated for their therapeutic potential. Autophagy activators, such as AMPK activators and certain drugs, may be beneficial in metabolic and neurodegenerative diseases. Autophagy inhibitors, such as rapamycin and chloroquine, are being tested in cancer therapy to enhance the effectiveness of chemotherapeutic agents. However, the long-term safety and efficacy of these approaches need to be carefully evaluated. The review highlights the complex roles of autophagy in various diseases and the need for further research to develop targeted therapies that modulate autophagy in a safe and effective manner. The potential of autophagy as a therapeutic target is promising, but challenges remain in understanding the precise mechanisms and ensuring the safety of autophagy-modulating drugs.