BDNF is a member of the nerve growth factor family of proteins. BDNF plays a pivotal role in the regulation of neuronal survival, differentiation, and synaptic plasticity, making BDNF essential for brain development and cognitive function. Binding of this protein to its cognate receptor promotes neuronal survival in the adult brain. BDNF is primarily localized within the secretory pathway of neurons, such as the endoplasmic reticulum and Golgi apparatus, where processing to mature BDNF occurs, a crucial neurotrophin involved in neuronal survival, differentiation, and synaptic plasticity. Understanding the cellular location of BDNF is essential for elucidating its role in neural development and implications in various neurological disorders.