The relationship between a healthy lifestyle and mental well-being is increasingly becoming the focus of research. Various biological factors, such as cholesterol levels, play a role in the development of depression, particularly in older individuals. In recent years, numerous studies have addressed how cholesterol affects mental health and what differences can be observed between men and women. Cholesterol can be divided into two main types: “good” (HDL) and “bad” (LDL) cholesterol. Their levels influence health in different ways, and recent research suggests they may play a key role in the prevention of depression. Therefore, regulating cholesterol levels in the older population is crucial not only for physical health but also…