Sirtuins are a family of proteins that regulate metabolism and healthspan. They act in various cellular compartments, deacetylating histones and other proteins, and are involved in energy homeostasis. Sirtuins, particularly SIRT1, play a key role in caloric restriction, preventing aging-related diseases, and maintaining metabolic balance. They are also involved in mitochondrial function, neurodegenerative diseases, and stress responses. Sirtuins are regulated by various factors, including NAD+, AMPK, and other signaling pathways. SIRT1 is the best studied sirtuin and is involved in glucose metabolism, insulin secretion, and lipid homeostasis. Other sirtuins, such as SIRT3, SIRT4, and SIRT6, have distinct roles in mitochondrial function, fatty acid oxidation, and lipid metabolism. Sirtuin activity is regulated by post-translational modifications, complex formation, and NAD+ levels. Sirtuins are potential targets for therapeutic interventions, particularly in metabolic diseases and aging-related conditions. The activation of sirtuins through compounds like resveratrol and SRT1720 has shown promise in improving metabolic health and extending lifespan. Overall, sirtuins are crucial regulators of metabolism and healthspan, with significant implications for the prevention and treatment of age-related diseases.Sirtuins are a family of proteins that regulate metabolism and healthspan. They act in various cellular compartments, deacetylating histones and other proteins, and are involved in energy homeostasis. Sirtuins, particularly SIRT1, play a key role in caloric restriction, preventing aging-related diseases, and maintaining metabolic balance. They are also involved in mitochondrial function, neurodegenerative diseases, and stress responses. Sirtuins are regulated by various factors, including NAD+, AMPK, and other signaling pathways. SIRT1 is the best studied sirtuin and is involved in glucose metabolism, insulin secretion, and lipid homeostasis. Other sirtuins, such as SIRT3, SIRT4, and SIRT6, have distinct roles in mitochondrial function, fatty acid oxidation, and lipid metabolism. Sirtuin activity is regulated by post-translational modifications, complex formation, and NAD+ levels. Sirtuins are potential targets for therapeutic interventions, particularly in metabolic diseases and aging-related conditions. The activation of sirtuins through compounds like resveratrol and SRT1720 has shown promise in improving metabolic health and extending lifespan. Overall, sirtuins are crucial regulators of metabolism and healthspan, with significant implications for the prevention and treatment of age-related diseases.