The Cortisol Cult

Here’s something your phone doesn’t want you to know: stress is real, it actually does damage your body, and the people selling you a $60 adaptogen powder to fix it are making it worse.

Cortisol is the hormone your body produces when it’s under threat. The system works like this: your brain perceives danger, your hypothalamus fires a signal, your adrenal glands pump out cortisol, your heart rate climbs, your blood sugar spikes, and you’re ready to run or fight. In 1987, the danger might have been a car skidding on ice. Today, it’s a passive-aggressive Slack message from your manager at 10 p.m. on a Sunday. Your body doesn’t know the difference.¹

That’s the actual problem. Not a cortisol “imbalance” that only a wellness influencer can detect. Not “cortisol belly.” The real issue is that we live in an environment that keeps the alarm system running on low-level idle, all day, every day, and over time that does real physiological damage.

What Chronic Stress Actually Does

The science here is not subtle. When cortisol stays elevated for months or years instead of minutes, it starts doing things to your body that you don’t want done. It raises blood pressure. It promotes insulin resistance. It contributes to elevated cholesterol and triglycerides. It increases abdominal fat. It suppresses immune function. It has been linked to accelerated progression of Alzheimer’s and Parkinson’s disease. It is associated with significantly higher risk of major depression.²

A large Australian longitudinal study found that people with moderate-to-high levels of perceived stress had roughly twice the risk of a diabetes diagnosis three years later.³ That’s a real finding from a real study with nearly 13,000 participants. That’s not nothing.

So yes, chronic stress is genuinely bad for you. The wellness industry is not wrong about that part. They just use that legitimate fact as a launchpad for selling you things that don’t work.

How Big Is the Problem, Exactly?

Here’s where it gets complicated, because if you’re hoping for a clean pie chart that says “diet causes 40% of disease, stress causes 25%, pollution causes 15%,” science doesn’t quite work that way.

What we do have is the Global Burden of Disease Study 2019, which analyzed 87 risk factors across 204 countries. It’s the most comprehensive effort to quantify what’s actually killing people. The top drivers of preventable disease burden: high blood pressure, high blood sugar, high BMI, poor diet quality, and tobacco use.⁴ Stress doesn’t show up as a standalone line item, and that’s not because researchers don’t take it seriously. It’s because stress is woven into most of the factors that do.

The WHO has estimated that environmental factors, broadly defined, account for roughly 23% of global deaths.⁵ Diet and physical inactivity together account for nearly 12% of all disability-adjusted life years globally.⁴ Stress sits inside these numbers as a contributor, not a competitor.

Here’s the honest framing: stress doesn’t exist in a vacuum. It affects what you eat, how much you sleep, whether you drink too much, and how your body processes all of it. A 2025 analysis from the National Institute of Environmental Health Sciences found that environmental risk factors, which include occupational stress and psychosocial stressors, were better predictors of chronic disease development than genetics in almost every case studied.⁶ Stress is part of that picture, not the whole picture.

The honest answer to “how significant is cortisol compared to diet or environment?” is: they’re not really separate things. Chronic stress changes your diet, degrades your sleep, and creates its own toxic internal chemical environment. The research doesn’t let you rank them cleanly because they compound each other.

The Grift Is Layered on Top of the Real Thing

This is what makes cortisol such perfect territory for the wellness industry. Unlike, say, the idea that eating citrus cures cancer, the cortisol story is built on a foundation of legitimate science. Stress does damage you. Cortisol is the mechanism. That’s all true. So when a supplement company or a social media health guru says “your cortisol is destroying you,” they’re not technically wrong. They’re just leaving out the part where their product can’t fix it.

The stress relief supplement market was valued at around $605 million in 2024 and is projected to nearly double by 2035.⁷ The products driving that growth include ashwagandha, L-theanine, adaptogen blends, magnesium powders, and something called a “cortisol cocktail” that influencers have been pushing on TikTok. Three doctors interviewed by Healthgrades were unified in their assessment: supplements marketed to “target cortisol” don’t have a clinical basis, and the biggest benefit from the popular cortisol drink trend is probably just increased hydration.⁸

Physicians are also flagging something darker: patients are using these trends to self-diagnose, avoiding real medical care while convincing themselves they’ve identified the root cause of their health problems. “Cortisol belly” as a TikTok concept is not a clinical diagnosis. If you’re gaining abdominal weight, there are a dozen possible causes, and most of them require a doctor, not a powder.

What Actually Helps

This is the part the wellness industry hates, because none of it costs $60 a month.

Walking. Regular aerobic exercise is one of the most well-documented cortisol regulators we have. Sleep. Chronic sleep deprivation elevates cortisol and degrades almost every system in your body. Social connection. Loneliness is a physiological stressor. Therapy, if what’s driving your stress is something that needs to be worked through with a professional. Addressing the actual source of the stress, when you have any control over it.

These aren’t secrets. They’re not going to make anyone rich. That’s why they don’t have their own TikTok trends.

The people who fall for the cortisol supplement pitch aren’t stupid. They’re stressed, which means their biology is already working against them, and someone with a camera and a confident tone handed them an easy answer. That’s not a character flaw. That’s a predatory industry doing exactly what it was designed to do.

The stress is real. The damage is real. The supplements are not the solution, and the people selling them know it.

References

1. Chronic stress puts your health at risk. Mayo Clinic. ↩
2. Knezevic E, et al. The Role of Cortisol in Chronic Stress, Neurodegenerative Diseases, and Psychological Disorders. Cells. 2023;12(23):2726. ↩
3. Understanding the relationships between physiological and psychosocial stress, cortisol and cognition. PMC. 2023. ↩
4. GBD 2019 Risk Factors Collaborators. Global burden of 87 risk factors in 204 countries and territories. The Lancet. 2020. ↩
5. Prüss-Ustün A, et al. Diseases due to unhealthy environments: an updated estimate of the global burden of disease. Journal of Public Health. 2017. ↩
6. Environment strongly influences chronic disease development. NIEHS Environmental Factor. April 2025. ↩
7. Stress Relief Supplement Market Size & Forecast 2025 to 2035. Future Market Insights. ↩
8. Health Influencers Are Obsessed with Reducing Cortisol: How Patients Are Being Scammed. Healthgrades. ↩