Stress is a constant threat for homeostasis and is represented by different extrinsic and intrinsic stimuli (stressors,
Hans Selye's "noxious agents"), such as aggressive behavior, fear, diseases, physical activity, drugs, surgical injury, and environmental
and physiological changes. Our organism responds to stress activating the adaptive stress system to activate
compensatory responses for restoring homeostasis. Nerve Growth Factor (NGF) was discovered as a signaling molecule involved
in survival, protection, differentiation, and proliferation of sympathetic and peripheral sensory neurons. NGF mediates
stress with an important role in translating environmental stimuli into physiological and pathological feedbacks since
NGF levels undergo important variations after exposure to stressful events. Psychological stress, lifestyle stress, and oxidative
stress are well known to increase the risk of mental disorders such as schizophrenia, major depressive disorders, bipolar
disorder, alcohol use disorders and metabolic disorders such as metabolic syndrome. This review reports recent works describing
the activity of NGF in mental and metabolic disorders related to stress.