Do your genes or your lifestyle decide your risk of disease?
Both matter, and for many common diseases your daily life can predict risk as much as or more than your genes. A large study of hundreds of thousands of U.S. adults found that social and lifestyle factors were as powerful as genetic risk scores for four of six common diseases.
Researchers at the Icahn School of Medicine at Mount Sinai wanted to answer a question many people quietly worry about. If heart disease or kidney disease runs in your family, are you simply stuck with that fate? Their answer offers real hope. The things you can change about your life seem to carry just as much weight as the genes you were born with.
What the researchers looked at
The team used data from the All of Us Research Program, a major effort to study health across a wide and diverse group of Americans. They examined hundreds of thousands of adults. For each person, they measured two very different kinds of risk. One was genetic risk, captured by a polygenic risk score. This score adds up the small effects of many genes to estimate how likely someone is to develop a disease.
The second kind of risk came from daily life. Researchers call these social determinants of health. They include things like loneliness, health behaviors, living conditions, and how easily a person can reach medical care. The team then checked how well each type of risk predicted six common diseases.
What the data show
For four of the six diseases studied, social and lifestyle factors predicted disease risk as much as or more than the genetic scores. Those four were coronary heart disease, which affects the blood vessels feeding the heart, chronic kidney disease, asthma, and high cholesterol. In other words, knowing about a person’s living conditions and habits told researchers at least as much as reading their genes.
Just as important was how the two types of risk combined. Genetic risk and life-circumstance risk added together in a simple, side-by-side way. There was little sign that one made the other worse. A person with both high genetic risk and difficult life circumstances faced added risk, but the two did not multiply each other into something far larger.
Dr. Kumar’s Take
I find this study reassuring, and I think my patients will too. So many people walk into my office convinced their family history is a sentence they cannot appeal. This research pushes back on that fear in a careful way. It does not claim genes do not matter. It says the parts of your life you can actually influence carry real weight, often equal to your DNA.
The finding that risks add up independently is the part I keep thinking about. It means that improving your circumstances helps you no matter what your genes look like. If you carry high genetic risk, you are not wasting your effort by eating better, staying connected to others, or getting regular care. You are lowering a separate stack of risk that sits right alongside your genes.
Why this matters
For years, much of the excitement in medicine has focused on genetic testing and personalized risk scores. Those tools are useful, but they describe something you cannot change. This study shifts attention back to the factors you can change. Loneliness, daily habits, housing, and access to a doctor are not fixed at birth.
That distinction has practical power. A polygenic risk score might tell you that you are more likely than average to develop heart disease, but it offers no lever to pull. Social and lifestyle factors come with obvious levers. They point toward actions, both for individuals and for the public health programs meant to protect whole communities.
Practical takeaways
- Treat your daily habits as serious medicine, since this study suggests they can shift disease risk as much as your genes for conditions like heart disease and high cholesterol.
- If you know you carry a family history of heart, kidney, or cholesterol problems, do not assume change is pointless, because lifestyle improvements appear to lower risk independently of your genetic makeup.
- Pay attention to social factors that are easy to ignore, such as loneliness and isolation, and look for ways to stay connected to friends, family, or community groups.
- Make steady access to medical care a priority, including regular checkups, so problems like high cholesterol or early kidney trouble can be caught and managed before they grow.
Related Studies and Research
- ultra-processed foods linked to 47% higher heart disease risk
- shingles vaccine cuts heart attack risk nearly in half for heart disease patients
- extra daily steps can cancel out the health risks of sitting too much
- long daytime naps linked to higher death risk in older adults
FAQs
Can a healthy lifestyle cancel out high genetic risk for heart disease?
This study did not show that lifestyle erases genetic risk, but it did show something encouraging. The two types of risk added together independently, so improving your circumstances lowers your overall risk no matter what your genes say. Someone with high genetic risk who also improves their habits still benefits from those changes. The genetic risk does not block the gains. Think of it as two separate piles of risk, where you can shrink one even if you cannot touch the other.
What are social determinants of health?
Social determinants of health are the everyday conditions that shape your wellbeing outside of a doctor’s office. In this study they included loneliness, health behaviors, living conditions, and access to medical care. These factors often get less attention than genes or medications, yet they had a powerful effect on disease risk. They matter because most of them can be changed, either by individuals or by community and public health efforts. That makes them a practical target for prevention.
Which diseases were most affected by lifestyle in this study?
The researchers studied six common diseases and found that social and lifestyle factors were as strong as or stronger than genetic scores for four of them. Those four were coronary heart disease, chronic kidney disease, asthma, and high cholesterol. For these conditions, knowing about a person’s life circumstances predicted risk at least as well as reading their genetic score. This suggests that prevention efforts aimed at daily life could meaningfully reduce the burden of these widespread diseases.
Bottom Line
This large study of hundreds of thousands of American adults delivers a hopeful message. For many common diseases, including coronary heart disease, chronic kidney disease, asthma, and high cholesterol, the conditions of your daily life can predict risk as much as or more than your genes. Because genetic and lifestyle risks add up independently, working on the things you can change lowers your risk no matter what you inherited. Your DNA is not your destiny, and the choices and circumstances around you carry real weight.
