# What Are Adverse Childhood Experiences (ACEs)?
ACEs, or adverse childhood experiences, measure childhood hardships that can shape lifelong health. The concept comes from a groundbreaking study linking difficult early experiences to chronic disease risk in adulthood.
The original ACE study, conducted by the Centers for Disease Control and Kaiser Permanente in the 1990s, tracked thousands of adults and their childhood histories. Researchers found a direct connection between childhood trauma and later physical and mental health problems. The more ACEs a person experienced, the higher their risk for conditions like heart disease, diabetes, depression, and substance abuse.
ACEs include 10 categories of adversity: physical, emotional, or sexual abuse; physical or emotional neglect; household dysfunction (parental separation, domestic violence, parental mental illness, parental substance abuse); and having an incarcerated family member.
Your ACE score ranges from 0 to 10, with each type of adversity counting as one point. Someone with an ACE score of 4 or higher faces substantially elevated health risks compared to someone with a score of zero.
Understanding your ACE score matters because it helps explain patterns in your health and behavior. Parents benefit from knowing their own ACE scores because adverse experiences can influence parenting styles. Childhood trauma often gets passed down through generations unless adults develop awareness and healing strategies.
The ACE framework isn't about blame. Rather, it recognizes that difficult childhoods create real neurological changes. Chronic stress during development affects brain regions responsible for memory, emotion regulation, and threat response.
Research shows resilience factors can buffer ACE effects. Strong relationships with supportive adults, stable housing, access to healthcare, and community involvement reduce the impact of childhood adversity. This is why intervention and treatment work. Therapy, particularly trauma-informed approaches, helps adults process childhood experiences and break harmful cycles.