Individuals suffering from psychiatric disorders are particularly vulnerable to early death, primarily from heart-related reasons. Patients with psychiatric disorders have a higher chance of developing metabolic syndrome. Numerous distinct cardiometabolic risk factors that raise morbidity and mortality are components of metabolic syndrome. There is a bidirectional longitudinal influence with metabolic syndrome and a correlation with the intensity and length of psychiatric symptoms. The development of metabolic syndrome is influenced by a number of factors, including an unhealthy diet, lack of sleep, alcoholism, smoking, genetic polymorphisms, mitochondrial dysfunction, immunometabolic and inflammatory conditions, endocrine abnormalities, and psychiatric medications. The elevated likelihood of metabolic syndrome in psychiatric disorders warrants extreme caution in preventing, closely observing, and managing individuals who are at risk.