182,000 People May Have Died From a Belief

In 2012, a team led by Abiola Keller at the University of Wisconsin-Madison published a study that should have broken everyone's brain. They tracked 28,753 U.S. adults over eight years, pulling data from the 1998 National Health Interview Survey. Two questions mattered. How much stress have you experienced in the past year? And do you believe stress is harmful to your health?

People who reported high stress AND believed it was harmful had a 43% increased risk of dying prematurely.

People who reported high stress but did NOT believe it was harmful? No increased mortality risk. Their death rates were among the lowest in the entire study. Lower than people who reported relatively little stress.

Read that again. The people under the most pressure, who didn't buy the story that pressure was killing them, outlived nearly everyone.

The researchers ran the numbers on what this meant at scale. Over the eight-year tracking period, approximately 182,000 Americans may have died prematurely not from stress itself, but from the belief that stress is harmful. If that estimate holds, "believing stress is bad for you" would rank as the 15th leading cause of death in the United States. Above HIV/AIDS. Above homicide. Above skin cancer.

A belief. Not a virus. Not a bullet. A belief.

The Caveat and Why It Still Matters

This was an observational study. Self-reported data. Potential confounds everywhere. The people who didn't believe stress was harmful might have been different in a hundred other ways. Maybe they exercised more, had better social support, drank less. The study can't prove causation.

But it landed in a field that was already accumulating evidence pointing the same direction. Jim Blascovich and Wendy Berry Mendes at UC Santa Barbara had been studying "challenge versus threat appraisals" since the late 1990s. Same stressor, two different physiological responses, depending entirely on how a person framed the situation. Challenge appraisals produced increased cardiac output and dilated blood vessels. Threat appraisals produced constricted vessels and elevated vascular resistance. Same stress. Different body. The variable was interpretation.

Alia Crum at Stanford (then at Yale) was running experiments that pushed this further. In 2013, Crum, Peter Salovey, and Shawn Achor published work showing that people's "stress mindsets" predicted their cortisol profiles and their performance. People who held a "stress-is-enhancing" mindset didn't just feel better under pressure. They had more adaptive hormonal responses. Their bodies literally processed the same stressor differently based on what they believed about stress in general.

Crum followed up in 2017 with work showing that stress mindset shaped cognitive, emotional, AND physiological responses to both challenging and threatening situations. The belief preceded the biology.

The Self-Fulfilling Prophecy

Kelly McGonigal, a health psychologist at Stanford, connected these threads for the public. Her 2013 TED Talk and her 2015 book The Upside of Stress made a provocative argument. The public health messaging around stress had become the problem. "Stress kills." "Reduce your stress." "Stress causes heart disease, cancer, depression, everything."

That messaging was well-intentioned. And it may have been making stress more dangerous.

Think about what happens when you believe stress is destroying your body. You get stressed (because life), then you get stressed about being stressed. You interpret your racing heart as damage happening in real time. You experience your own arousal as a threat signal rather than a readiness signal. Your body responds to your interpretation with constricted blood vessels, sustained cortisol, suppressed immune function.

You turned a performance response into a damage response. With a belief.

The Keller study didn't prove that stress is harmless. Chronic, unrelenting stress with no recovery absolutely causes measurable harm. But the study revealed something the "stress kills" narrative completely missed. Your relationship to stress is a variable. Maybe the most important variable.

The Biology Behind the Belief

Your body has more than one stress response. This is the part most people never hear.

The default story is fight-or-flight. Adrenaline, cortisol, racing heart, tunnel vision. That's real. But Shelley Taylor at UCLA identified a completely different stress response in 2000. She called it "tend-and-befriend." Under stress, the body also releases oxytocin, which drives you toward connection, caregiving, and social bonding. This response was especially pronounced in women but present across genders.

Oxytocin isn't just a bonding hormone. It's a cardiovascular protector. It helps heart cells regenerate after stress-related damage. It's anti-inflammatory. Your body releases it DURING stress, not after.

Michael Poulin and colleagues at the University of Buffalo found in 2013 that people who spent time helping others showed no stress-related increase in mortality. Stress predicted dying, but only for people who weren't engaged in caring for others. The tend-and-befriend response appeared to neutralize the damage.

James Coan at the University of Virginia demonstrated in 2006 that simply holding a partner's hand reduced the neural threat response during stress. Brain scans showed less activation in regions associated with pain and fear. The quality of the relationship mattered. Better relationships produced bigger buffering effects.

Sheldon Cohen at Carnegie Mellon showed in 2015 that people who received more hugs were less susceptible to infection after being deliberately exposed to a cold virus. Physical connection didn't just feel good. It measurably protected immune function during stress.

Your body isn't just flooding you with cortisol and hoping for the best. It's simultaneously releasing neurochemicals designed to push you toward the exact behaviors that protect you from the damage. Connection. Caregiving. Physical closeness.

Unless you're sitting alone, believing that the stress is destroying you, and avoiding people because you "need to de-stress."

The Reframe That Changes the Response

Jeremy Jamieson at the University of Rochester ran an experiment in 2010 that I keep coming back to. He took people about to take the GRE (a genuinely stressful standardized test) and gave half of them a simple instruction before the exam. He told them that their physiological arousal, the racing heart, the sweaty palms, was actually a sign their body was preparing to perform well.

That's it. One reframe. No meditation. No breathing exercises. No therapy.

The reframe group showed improved cardiovascular efficiency (more blood flow, less vascular resistance) and scored significantly better on the math section. Months later, when they took the real GRE, the improvements persisted.

Alison Wood Brooks at Harvard found the same principle in 2014 with performance anxiety. Telling yourself "I am excited" before a stressful performance (singing, public speaking, math) produced measurably better outcomes than telling yourself "I am calm." Both are reframes, but excitement matches the arousal. You're not fighting your body. You're relabeling what it's already doing.

I notice this in my own work. When I'm building something and hit that wall where the code doesn't compile and the deadline is real and my chest gets tight, there's a fork. One path is "this stress is going to ruin my focus." The other path is "my body is mobilizing energy because this matters." Same sensation. Completely different downstream experience.

The second path doesn't always win. Old patterns are stubborn. But when it does win, the difference is night and day. Not in the stress level. In what the stress does.

What This Changes

The Keller study didn't prove that you can think your way out of chronic poverty, abuse, or systemic oppression. Stress mindset research has real limits. Reframing works best when you actually have some agency in the situation. Telling someone to embrace stress while they're working three jobs with no healthcare isn't helpful. It's insulting.

But for the enormous category of stress that comes from things you chose (hard work, ambitious goals, learning new skills, building relationships, creating things), the research is clear. Your interpretation of the stress response changes what the stress response does to your body.

Not metaphorically. Measurably. In blood vessels, cortisol curves, immune markers, and apparently, mortality data.

182,000 people. From a belief.

The stress paradox starts here. The response you've been told is killing you might be the same response that's trying to help you perform, connect, and grow. The first step isn't reducing your stress. It's questioning the story you've been told about what stress is.

Sources

• Does the perception that stress affects health matter? The association with health and mortality (Keller et al., 2012, Health Psychology)
• Rethinking stress: The role of mindsets in determining the stress response (Crum, Salovey & Achor, 2013, JPSP)
• The role of stress mindset in shaping cognitive, emotional, and physiological responses to challenging and threatening stress (Crum et al., 2017, Anxiety, Stress, & Coping)
• Biobehavioral responses to stress in females: Tend-and-befriend, not fight-or-flight (Taylor et al., 2000, Psychological Review)
• Giving to others and the association between stress and mortality (Poulin et al., 2013, AJPH)
• Lending a hand: Social regulation of the neural response to threat (Coan, Schaefer & Davidson, 2006, Psychological Science)
• Does hugging provide stress-buffering social support? (Cohen et al., 2015, Psychological Science)
• Turning the knots in your stomach into bows: Reappraising arousal improves performance on the GRE (Jamieson et al., 2010)
• Get excited: Reappraising pre-performance anxiety as excitement (Brooks, 2014, JEP: General)
• Challenge and threat appraisals: The role of affective cues (Blascovich & Mendes, 2000)
• The Upside of Stress: Why Stress Is Good for You, and How to Get Good at It (McGonigal, 2015, Avery)

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Part of the Stress Paradox series. Next: Your Body Has Two Stress Modes (One Builds You Up, One Breaks You Down).