Written by the Nuvirox Research Team
Short answer: NAD+ precursors reduce circulating inflammatory markers that are elevated by chronic stress, but no trial has directly tested cortisol, perceived stress, or stress resilience as an outcome. The inflammation connection is real; the "stress resilience" framing is an extrapolation from it.
Key Points
- Chronic stress raises circulating inflammatory cytokines over time — a process sometimes called low-grade inflammaging.
- A randomized trial in older adults found NR supplementation suppressed specific circulating inflammatory cytokines.
- No published trial has measured cortisol, HPA-axis function, or subjective stress resilience after NAD+ precursor supplementation.
Why stress and NAD+ metabolism are linked at all
Chronic psychological stress doesn't just feel bad — it has measurable downstream biology. Sustained activation of the hypothalamic-pituitary-adrenal (HPA) axis and the sympathetic nervous system is associated with elevated circulating inflammatory markers over time, a pattern researchers sometimes describe as part of "inflammaging" (the low-grade, chronic inflammation that accumulates with both age and chronic stress exposure). Since NAD+-dependent enzymes like sirtuins help regulate inflammatory gene expression, there's a plausible mechanistic bridge between raising NAD+ and dampening some of that stress-associated inflammation.
What's actually been measured: inflammation, not stress
The most directly relevant human trial comes from a placebo-controlled, randomized study of nicotinamide riboside (1 g/day for 21 days) in a cohort of aged men. Alongside its primary finding — that NR augments the skeletal muscle NAD+ metabolome — the trial reported that NR suppressed specific circulating inflammatory cytokine levels compared to placebo [1]. This is a genuinely relevant finding for anyone interested in the biology of chronic stress, since inflammatory cytokines are one of the measurable downstream consequences of sustained stress exposure.
Study snapshot: Elhassan et al. — NR and inflammatory markers in aged adults
| Design | Randomized, double-blind, placebo-controlled, crossover |
| Population | 12 men, median age 75 |
| Dose / duration | 1 g/day NR, 21 days |
| Key finding | Suppressed specific circulating inflammatory cytokines |
What this trial did not measure — and what no trial has measured — is cortisol, subjective stress ratings, resilience questionnaires, or any HPA-axis function test. The inflammation finding is real and relevant to stress biology broadly, but "reduces some inflammatory markers in a 12-person trial" and "improves stress resilience" are two different claims, and only the first has direct evidence behind it.
What NAD+ won't do
NAD+ precursors are not a treatment for anxiety, chronic stress, burnout, or any diagnosable stress-related condition, and there's no trial evidence they reduce cortisol or improve psychological resilience specifically. If stress is significantly affecting your daily functioning, sleep, or mood, evidence-based approaches — from structured stress-management techniques and exercise to therapy or, where appropriate, medical treatment — have far more direct human evidence behind them for that specific goal.
A grounded way to think about this
If you're already dealing with the physical wear of chronic stress — poor sleep, low energy, a sense of being constantly run-down — the inflammation-reduction finding is a reasonable, if modest, piece of supporting evidence for general cellular health support during that period. It's not evidence that an NAD+ precursor will make you feel calmer or more resilient to stress itself.
Frequently asked questions
Does NAD+ lower cortisol?
No trial has measured this. There's no direct evidence that NAD+ precursors affect cortisol levels.
Can NAD+ supplements help with burnout or chronic stress?
There's no trial evidence for this specific claim. A related but different finding is that NR reduced inflammatory markers in one small trial — inflammation is one downstream effect of chronic stress, but that's not the same as treating burnout.
What has better evidence for stress management?
Regular physical activity, adequate sleep, structured stress-reduction techniques (like cognitive behavioral approaches), and social support all have substantially stronger human evidence for improving stress resilience specifically.
Is it worth taking NAD+ Restore during a stressful period?
If you're interested in general cellular energy and inflammation support during a demanding period, the mechanistic case is reasonable — just don't expect it to directly address the psychological experience of stress.
If chronic tiredness is part of what’s driving this question, our related articles on burnout and chronic exhaustion and chronic stress and fatigue dig further into that specific overlap, and our piece on NAD+ and thyroid function covers another commonly confused energy-related pathway.
Is there a difference between acute stress and chronic stress in this research?
The relevant trial measured inflammatory markers after 21 days of supplementation in an aging population, which is more reflective of a chronic-exposure context. Acute, short-term stress responses haven't been separately tested with NAD+ precursors.
A separate, more recent trial offers an adjacent data point, even though it wasn’t designed around stress specifically. A randomized controlled trial testing nicotinamide riboside in long-COVID patients measured NAD+ levels alongside cognition and symptom recovery, building on earlier findings that NR reduces circulating inflammatory cytokines and, in a Parkinson’s disease trial, was associated with reduced inflammatory markers in both serum and cerebrospinal fluid. Long-COVID and chronic stress aren’t the same condition, but both involve a similar profile of persistent low-grade inflammation and reported cognitive fog — which is part of why researchers keep returning to inflammation as the most plausible mechanistic bridge between NAD+ precursors and stress-adjacent symptoms, even without a stress-specific trial to point to directly.
It’s worth being clear about what "resilience" would actually require researchers to measure, since the term covers a lot of ground: validated psychological questionnaires, cortisol sampling across the day, heart-rate-variability measures, or task-based measures of recovery from an acute stressor. None of these have appeared in a published NAD+ precursor trial to date, which is why the current evidence base can speak to inflammation but genuinely cannot speak to resilience as most people mean the term. That gap is worth remembering the next time a headline conflates the two, since a marker moving in a blood sample is simply a different kind of evidence than a person reporting they genuinely feel calmer or more able to cope with daily pressure.
From Nuvirox
Why we formulated NAD+ Restore
If what you're dealing with sounds like it belongs in a doctor's office rather than a supplement aisle, please start there — a clinician can rule out the specific causes discussed above. For general cellular energy support, each serving of NAD+ Restore provides 500 mg of nicotinamide riboside chloride (NR), one of the two most-researched NAD+ precursors, within the dose range used in published human trials, alongside 150 mg trans-resveratrol and 50 mg quercetin (polyphenols studied alongside NAD+ pathways for cellular health support) and 10 mg of galactomannans from fenugreek to support absorption.
We back it with a 60-day money-back guarantee — long enough to actually evaluate it the way the research says you should.
Learn more about NAD+ Restore →The bottom line
There's a real, trial-supported connection between NAD+ precursors and reduced circulating inflammatory markers — one of the measurable downstream effects of chronic stress. But no research has tested cortisol, HPA-axis function, or stress resilience directly, so the leap from 'reduces some inflammation' to 'builds stress resilience' isn't something the current evidence actually supports. Treat this as a plausible, partial mechanism, not a stress solution.
References
- Elhassan YS, Kluckova K, Fletcher RS, et al. Nicotinamide Riboside Augments the Aged Human Skeletal Muscle NAD+ Metabolome and Induces Transcriptomic and Anti-inflammatory Signatures. Cell Rep. 2019;28(7):1717-1728. PMCID: PMC6702140.
- Damgaard MV, Treebak JT. What is really known about the effects of nicotinamide riboside supplementation in humans. Sci Adv. 2023;9. doi:10.1126/sciadv.adi4862.
*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. This article is for informational purposes only and is not a substitute for professional medical advice.