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Nearly half of American adults — 49%, according to a 2023 Gallup poll — report they frequently experience stress. That number has risen 16 percentage points over the past two decades, reaching the highest level Gallup has ever recorded.
And the wellness industry is ready for you. There’s a supplement, a device, a blood test, or a program for every stressed-out soul. Ashwagandha. Cortisol curve testing. Grounding mats. $500 external vagus nerve stimulators. Adrenal fatigue protocols. The offers are endless — and so is the expense.
But here’s what they’re not telling you: most of it is hype. And the things that actually work? You’ve probably already heard of them — you’re just not doing them consistently enough.
This is an open-minded skeptic’s deep dive into stress: what it really is, how to measure it objectively, which interventions have real evidence behind them, and which ones will take your money and leave you exactly as stressed as before.
One important caveat before we begin: for some people, meaningful stress relief requires real life changes — a different job, a different relationship, a different approach to managing competing demands. A skilled therapist can help you identify and work through those root causes in ways that no supplement, gadget, or breathing exercise can. That kind of help is genuinely valuable, but it falls outside this article’s scope. What follows is focused on evidence-based self-management strategies that you can measure and test on your own.
What Is Stress, Really?
We usually open the stress conversation with a tiger chasing you through the African savanna. Adrenaline surges. Your sympathetic nervous system fires. You run. You survive. That’s acute stress, and it’s relatively simple.
What matters more to most of us is chronic, day-to-day stress: feeling overloaded, worn out, tense — as if life is constantly asking more of you than you can handle. And this kind of stress is maddeningly hard to define, which is part of what makes the wellness industry’s promises so seductive.
Hungarian endocrinologist Hans Selye, one of the original pioneers of stress research, captured the problem perfectly: stress is “a scientific concept which has suffered from the mixed blessing of being too well known and too little understood.” Psychologist Richard Lazarus added precision: stress occurs when the demands of a situation threaten to exceed the resources of the individual. Crucially, that’s a perception, not an objective measurement. If you believe you can’t cope, you’re stressed — regardless of what your cortisol levels say.
I got a front-row seat to this before my most recent Ironman 70.3 triathlon — at age 69. Logically, I knew I would probably finish. But the anxiety in the days leading up to the race was real: the fear of failing, of the pain and fatigue being too much, of public shame. My resting heart rate rose significantly, and my heart rate variability — a measure of how well my body’s stress systems are balancing — greatly worsened. I didn’t sleep well. The likelihood of catastrophe was small — but my perceived resources didn’t feel equal to the perceived demands. That’s stress.
What Stress Is NOT: The Adrenal Fatigue Myth
Here’s where the hype begins. You may have heard these phrases: “your nervous system is dysregulated,” “your cortisol is out of balance,” or — the biggest red flag of all — “you have adrenal fatigue.”
If someone tells you that you have adrenal fatigue, walk away. The Endocrine Society — the physician group that specializes in all things hormonal — is unambiguous: adrenal fatigue is not a recognized medical diagnosis. A 2016 systematic review found no substantiation that adrenal fatigue is a real medical condition.
The symptoms — fatigue, brain fog, poor sleep, feeling “tired but wired” — are absolutely real. But the explanation that your adrenal glands are burned out is invented. And once that diagnosis is on the table, a practitioner can sell you saliva cortisol tests, cortisol curves, and a cascade of supplements. In one study examining 12 popular “adrenal support” supplements, published in Mayo Clinic Proceedings, researchers found that every single one contained undisclosed thyroid hormone, and most also contained undisclosed steroid hormones — unlabeled, unregulated, and potentially dangerous.
One important note: there is a real condition where the adrenal glands fail — Addison’s disease. It’s life-threatening, rare, and will likely send you to the emergency room. That’s not adrenal fatigue. Your doctor should also consider thyroid problems and rare tumors that can mimic stress symptoms. But these are medical conditions, not wellness diagnoses.
How to Measure Stress Objectively
Lord Kelvin famously said, “If you can’t measure it, you can’t improve it.” Stress is no exception — and measuring it is essential if you want to test whether anything you’re doing actually helps.
My top recommendation is the Perceived Stress Scale (PSS-10), a 10-question validated questionnaire used widely in research. It takes about two minutes, produces a score from 0 to 40, and is available free online. Questions include things like: “In the last month, how often have you felt unable to control the important things in your life?” Higher scores mean more stress.
You can supplement that with wearable data. Resting heart rate and heart rate variability (HRV) — measured by devices like the Oura Ring — give you additional signal. HRV tracks the beat-to-beat variation in your heart rate, influenced by vagal tone and the balance between your sympathetic and parasympathetic nervous systems. In the week before my race, my HRV greatly worsened and my resting heart rate rose significantly — consistent with my PSS scores showing elevated stress. All three measures told the same story.
As for salivary or blood cortisol: cortisol fluctuates constantly throughout the day, making it largely impractical as a personal stress tracker — and it opens the door to the upsell I described above. Save your money.
What Actually Works: The Evidence Tier
Sleep — Strong Evidence
Sleep belongs at the top of the evidence hierarchy. A 2021 meta-analysis of 65 randomized controlled trials involving over 8,000 participants found that improving sleep led to significant improvements in anxiety and stress. Importantly, there was a dose-response relationship: the greater the sleep improvement, the greater the mental health benefit. If sleep is currently a problem for you, addressing it may be the single highest-leverage thing you can do. That said, if your sleep is already pretty good, squeezing out a bit more quality is unlikely to meaningfully move the needle on your stress. This is one for people where sleep is a genuine weak spot.
Exercise — Strong Evidence
Physical activity is one of the most robustly studied interventions in all of mental health. A large review of 1,039 randomized controlled trials with over 128,000 participants found that exercise improved depression, anxiety, and general psychological distress — with higher intensity associated with greater benefit. The same caveat applies here as with sleep: if you’re already exercising regularly and consistently, adding more is unlikely to produce large additional stress benefits. This intervention is most powerful for those who are currently sedentary or inconsistent.
Breathwork — Modest Evidence
A meta-analysis of 12 randomized controlled trials in approximately 785 people found modest but statistically significant improvements in stress and anxiety from breathwork. The evidence isn’t dramatic, but breathwork is easy to test, free, and carries no downside. Before my race, I doubled down on five-minute breathwork sessions and found real personal benefit. Its impact on you may vary, which is exactly why measuring your response matters.
Meditation — Good Evidence
In a particularly clever study, researchers used a smartphone app that randomly assigned users to meditate on a given day or not — a true randomized design. Among 343 participants, even brief meditation (sometimes as little as five minutes daily) produced measurable reductions in distress compared to controls. A related study found that meditators showed reductions in IL-6, a blood marker of inflammation — suggesting meditation doesn’t just calm the mind, but may also affect the biology of stress itself.
Music Therapy — Surprising Evidence
I’ll admit I didn’t expect much here. But a meta-analysis of 47 studies involving 2,747 participants found that music therapy — delivered by a trained music therapist who selects music based on the individual — produced significant improvements in stress-related symptoms, including reductions in heart rate, blood pressure, and cortisol. Whether simply listening to your favorite album delivers the same benefit is unknown. But the formal evidence is stronger than I anticipated.
Aromatherapy — Small but Real Effect
Another surprise: in a meta-analysis of lavender and other essential oils covering 65 randomized controlled trials and nearly 8,000 participants, researchers found statistically significant reductions in anxiety. The effects weren’t large. But lavender costs almost nothing, it’s harmless, and it might help. That puts it firmly in the “can’t hurt, might help, worth trying” category.
The Hype: Where Your Money Goes to Die
Supplements
The stress supplement market is enormous: ashwagandha, magnesium, L-theanine, rhodiola, kava, saffron, lion’s mane, reishi mushrooms. None have clear, convincing evidence for stress relief in humans. Take ashwagandha as a cautionary case study: there are studies suggesting possible benefit, but also evidence that it may interfere with key hormones in undesirable ways. Denmark has banned it over health concerns. And because supplements aren’t regulated, you often don’t know what you’re actually consuming — as demonstrated by the adrenal supplement study above. None of these supplement approaches has credible evidence to support their use for stress. Save your money.
External Vagus Nerve Stimulators
This one deserves special attention because the underlying science is genuinely interesting. The vagus nerve is the grand conductor of the autonomic nervous system, governing heart rate, breathing, digestion, and much more. There are now FDA-approved implantable vagus nerve stimulators — sophisticated devices with strong evidence for drug-resistant epilepsy, treatment-resistant depression, and remarkably, even rheumatoid arthritis. In a landmark study published in PNAS, vagus nerve stimulation significantly improved disease activity in RA patients — some who had failed multiple biologic treatments — by reducing inflammatory cytokine production. Nerve stimulation in the neck changed joint symptoms.
That’s genuinely exciting science. But here’s the problem: what the Instagram ads are selling you is not that. The $300–$500 external wearable devices that strap to your neck and promise to reduce stress are not the FDA-approved implantable devices, and they are not FDA-approved for stress. They follow the classic hype formula: a cool theory (help your vagus nerve!) + compelling anecdotes + credentialed-sounding endorsers. The implantable device is real medicine. The consumer gadget is not. None of these external devices has credible evidence to support their use for stress. Save your money.
The same skepticism applies to red light therapy boxes, earthing or grounding mats, detox cleanses, and IV vitamin drips. A cool theory and enthusiastic testimonials are not evidence. None of these approaches has credible evidence to support them. Save your money.
The N-of-1 Approach: Finding What Works for You
Even among the evidence-supported approaches, what works best varies person to person. That’s where the N-of-1 framework comes in — and stress is actually an ideal domain for it, because the outcome is measurable, the interventions are safe, and you can see results within weeks.
The protocol is simple:
Step 1: Establish a baseline. Take the PSS-10 online and record your score. Note your resting heart rate and HRV if you have a tracker.
Step 2: Choose one evidence-supported intervention and commit to it for one to three weeks. Don’t change multiple variables at once.
Step 3: Re-measure using the same tools. Did your PSS score improve? Did your heart rate or HRV shift?
Step 4: Interpret and iterate. If it helped, you have your answer. To confirm causality, stop the intervention and see if stress returns. If it does, restart. If there was no improvement, try the next approach on the evidence list.
In my case, the week before my race I doubled down on meditation and structured breathwork. My HRV and heart rate didn’t fully recover — the race stress was real — but my subjective experience of distress improved meaningfully. Meditation and breathwork are now confirmed interventions in my personal toolkit.
The Bottom Line
A final word on what this article doesn’t cover: for some people, chronic stress is rooted in circumstances that truly need to change — a toxic workplace, a struggling relationship, financial pressure that feels impossible to escape. No amount of breathwork or lavender will fix those. A therapist can help you navigate those deeper sources of stress, and life changes that reduce the demands on you — or increase your sense of control and resources — may ultimately do more than any self-management strategy. If that applies to you, please pursue it.
But within the domain of self-management, the evidence is clear. Stress is real, common, and rising. You can meaningfully reduce how it affects your body and mind using approaches that cost little to nothing: consistent sleep (if it’s currently poor), regular exercise (if you’re not already doing it), brief daily meditation or breathwork, and perhaps some lavender on your nightstand.
The expensive supplements, the external vagus nerve gadgets, the adrenal fatigue protocols — skip them. They’re built on cool theories and enthusiastic testimonials, not on evidence. And the practitioners selling them are not doing you any favors. Don’t stress out about which approach might help your stress. Pick one from the evidence list, measure your response, and iterate. There are ways to improve it — grounded in science — t
