The 12 social determinants of health are a set of non-medical factors that shape how long and how well people live. The most widely cited list of 12 comes from the Public Health Agency of Canada, which identifies: income and social status, employment and working conditions, education and literacy, childhood experiences, physical environments, social supports and coping skills, healthy behaviours, access to health services, biology and genetic endowment, gender, culture, and race/racism. Each factor interacts with the others, creating a web of conditions that can either protect your health or erode it over decades.
Income and Social Status
Income is the single most powerful predictor of health outcomes across populations. People with higher incomes live longer, experience fewer chronic diseases, and report better mental health. The reasons are layered: money buys better food, safer housing, and access to services, but income also determines social status, which influences stress levels and the degree of control you feel over your own life. The gap matters too. In societies with wider income inequality, health outcomes tend to be worse even for people in the middle of the income spectrum, not just those at the bottom.
Employment and Working Conditions
Your job affects your health far beyond the paycheck. Work-related stress, characterized by high demands paired with low control, is a well-documented risk factor for heart disease. A large study published in the Journal of the American Heart Association found that workers reporting job-related stress had roughly 25% lower odds of having optimal cardiovascular health compared with workers who didn’t. Other research has found that people experiencing high job strain had nearly twice the odds of being physically inactive and more than double the odds of having a poor diet or obesity.
Unsafe physical conditions, exposure to chemicals, irregular hours, and lack of benefits like paid sick leave all compound the problem. Unemployment carries its own risks, including higher rates of depression, anxiety, and substance use.
Education and Literacy
Education shapes health in both direct and indirect ways. More years of schooling generally lead to higher income, more stable employment, and better housing, all of which are their own determinants. But education also builds health literacy: the ability to find, understand, and use health information to make good decisions. People with higher health literacy tend to manage chronic conditions more effectively, stick with treatments, and make better use of available health resources. Those with lower health literacy often know less about their conditions, struggle to follow treatment plans, and face higher mortality risk as a result.
Childhood Experiences
What happens in the first years of life sets a biological and psychological foundation that lasts decades. Adverse childhood experiences, including abuse, neglect, household instability, and poverty, alter how the body responds to stress. Children exposed to chronic adversity develop stress-response systems that stay on high alert, flooding the body with stress hormones over and over. This “wear and tear,” which researchers call allostatic load, gradually damages the cardiovascular, immune, and metabolic systems. The effects don’t fade with time. Adults who experienced significant childhood adversity have higher rates of heart disease, diabetes, depression, and substance use disorders.
Physical Environments
Where you live, work, and spend your time has a direct impact on your body. Poor indoor air quality is linked to asthma and other respiratory diseases. Homes with lead paint or contaminated water expose residents to a toxin that causes learning and behavior problems in children and high blood pressure in adults. Pest infestations contribute to rashes, bites, and worsened asthma. Inadequate heating or ventilation leads to injuries from temperature extremes and chronic illness from indoor pollutants.
Beyond housing, the broader built environment matters. Neighborhoods without sidewalks, parks, or grocery stores make it harder to be physically active or eat well. Communities near industrial sites or major highways face higher exposure to air pollution, which raises the risk of respiratory and cardiovascular disease.
Social Supports and Coping Skills
The strength of your social connections is a health factor on par with smoking, obesity, and physical inactivity. The U.S. Surgeon General’s 2023 advisory on loneliness reported that being socially disconnected carries a mortality risk similar to smoking up to 15 cigarettes a day, and a greater risk than that associated with obesity or sedentary living. Loneliness and isolation are also more widespread than many of those conditions, affecting a larger share of the U.S. adult population than smoking or diabetes.
Social support works as a buffer. People with strong relationships recover faster from illness, manage stress more effectively, and are more likely to maintain healthy behaviors. Coping skills, the psychological tools you use to handle adversity, work in tandem with social networks. Someone with both a strong support system and effective coping strategies is far more resilient to the health effects of stress than someone lacking either.
Healthy Behaviours
Diet, physical activity, smoking, alcohol use, and sleep are all classified as a determinant in this framework, but with an important caveat: these behaviors don’t exist in a vacuum. Whether someone eats well or exercises regularly depends heavily on the other 11 determinants. A person working two jobs in a neighborhood without a grocery store faces very different choices than someone with flexible hours and a farmers’ market nearby. Framing health behaviors as a social determinant acknowledges that “lifestyle choices” are shaped by the conditions surrounding them, not just individual willpower.
Access to Health Services
Having timely access to preventive care, treatment, and mental health services changes outcomes for nearly every condition. But access isn’t just about whether a clinic exists nearby. It includes whether you can afford the visit, take time off work, arrange transportation, find a provider who speaks your language, and get an appointment within a reasonable timeframe. Rural communities, low-income neighborhoods, and Indigenous populations often face compounding barriers on multiple fronts. Lack of access delays diagnoses, leads to more emergency room visits for conditions that could have been managed earlier, and worsens outcomes for chronic diseases.
Biology and Genetic Endowment
Genetics set the baseline. Your inherited biology influences susceptibility to certain diseases, how your body metabolizes food and medication, and how quickly you age. Some conditions, like sickle cell disease or cystic fibrosis, are directly genetic. For most health outcomes, though, genes create a predisposition that the social environment either activates or suppresses. A genetic tendency toward type 2 diabetes, for instance, may never develop into disease in someone with stable income, good nutrition, and low chronic stress, while it may emerge early in someone facing poverty and food insecurity.
Gender
Gender influences health through both biology and social roles. Biological sex affects disease risk, hormonal patterns, and drug metabolism. But gender as a social determinant goes further: it shapes the expectations, opportunities, and stressors a person faces. Women are more likely to experience certain forms of violence, carry a disproportionate share of unpaid caregiving, and face wage gaps that affect every income-related determinant. Men, on the other hand, are less likely to seek medical care and face higher rates of occupational injury and death. Gender-diverse individuals encounter additional barriers, including discrimination in healthcare settings and higher rates of mental health challenges linked to social stigma.
Culture
Cultural background shapes health beliefs, dietary patterns, attitudes toward medical care, and willingness to seek help. Some cultural practices are protective, such as strong family networks, community-oriented lifestyles, and traditional diets rich in whole foods. Others can create barriers, particularly when cultural norms discourage discussing mental health or when traditional healing practices delay evidence-based treatment. A health system that doesn’t account for cultural differences in communication styles, decision-making, and trust risks alienating the populations that need it most.
Race and Racism
Race appears on this list not because of biological differences between racial groups, which are minimal, but because of racism as a structural force. Systemic racism shapes where people live, what jobs they can access, how much wealth they accumulate, and how they’re treated by institutions, including healthcare. KFF survey data shows that about 18% of Black adults and 12% of American Indian/Alaska Native adults report being treated unfairly by a healthcare provider specifically because of their race, compared with 3% of white adults. At least half of Black, Hispanic, and American Indian/Alaska Native adults reported experiencing discrimination in daily life within the past year.
These experiences of discrimination don’t just affect access to care. They contribute to chronic stress, which over time dysregulates the body’s stress-response systems. Stress hormones that remain elevated for months and years trigger a cascading breakdown across interconnected biological systems, raising the risk of cardiovascular disease, metabolic disorders, and premature death. This is one of the key mechanisms through which social disadvantage becomes physical disease.
How These Determinants Interact
No single determinant operates alone. A person’s income affects their neighborhood, which affects their physical environment, which affects their health behaviors, which interact with their biology. Childhood adversity shapes education, which shapes employment, which shapes income. Racism cuts across nearly every other determinant, compounding disadvantage at each level. This interconnected nature is what makes social determinants so powerful and so difficult to address with any single intervention. The people who face the worst health outcomes are typically those experiencing disadvantage across multiple determinants simultaneously, not just one.