This document summarizes key topics from a training on integrating trauma-informed approaches in behavioral health settings. It discusses how trauma affects the brain and body, including how it impacts memory formation and can trigger traumatic memories. It also explains polyvagal theory, which describes how the autonomic nervous system responds to safety, danger, or life threats. When feeling threatened, the body activates either a fight-flight-freeze response or a dorsal vagal shutdown. Creating safe, trusting environments is important for recovery from trauma and substance use disorders.