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Released: ·Last reviewed: ·Prices verified October 15, 2026·Methodology v4.1

NAD+: what the human evidence actually shows

Direct answer

NAD+ is a coenzyme present in every living cell, central to mitochondrial energy production and to the activity of sirtuins and PARP enzymes involved in DNA repair. It is sold by longevity and wellness clinics as an intravenous infusion, a subcutaneous injection and an oral or sublingual supplement, marketed for energy, cognition, addiction recovery and anti-ageing.

What the evidence actually shows

The honest summary: the biology is real and the clinical evidence is thin. NAD+ levels do decline with age, and that decline is genuinely implicated in mitochondrial dysfunction — this is well-established cell biology. What has not been established is that supplementing NAD+ or its precursors in humans reverses ageing, restores energy, or improves cognition. Human trials of NAD+ precursors have been small and short, have generally shown that blood NAD+ levels can be raised, and have largely failed to demonstrate the downstream clinical benefits that the marketing promises. Raising a biomarker is not the same as improving an outcome. Most of the striking results come from mice, and mouse longevity findings have a long history of not translating to humans.

Three ways evidence gets overstated hereThree moves recur constantly in this category, and once you can name them you will see them everywhere. Mouse-to-human transfer: a striking longevity result in mice, presented as though it applies to you. Biomarker-for-outcome substitution: a study shows a blood level rose, and the marketing implies you will feel better or live longer. Deficiency-to-enhancement transfer: a treatment that helps people with a diagnosed deficiency is sold to healthy people seeking optimisation. None of these are valid inferences.

Frequently asked questions

What does NAD+ cost through telehealth?

We have not verified a market price. On October 15, 2026, Oak Longevity listed NAD+ injections at $175 a month, regularly $199, a promotional price. That is one provider’s page, not a typical price. Ask any clinic for the total cost per month, including visits and supplies, in writing.

Is NAD+ FDA-approved?

No. There is no FDA-approved NAD+ drug as of October 15, 2026. NAD is in Category 1 of FDA’s interim 503A policy, so licensed pharmacies may compound it while FDA evaluates it. That is enforcement discretion, not approval or proof that it works.

Does NAD+ work?

Human studies of NAD+ injections and drips are small and short and mostly show that NAD+ levels rise. Claims about slower ageing, energy or sharper thinking rest largely on animal research. We have not re-read the literature for this update and cite no trial.

Sources

  1. U.S. Food and Drug Administration — approved labels and compounding guidance for this molecule.
  2. PubMed / NIH — indexed human clinical literature.
  3. ClinicalTrials.gov — registered trials, where they exist.
  4. Our source hierarchy and pricing-verification methodology.

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Researched ByDr. Parmis · Medical Researcher · Western University of Health Sciences

Medically Reviewed ByDr. Jonathan Snipes, MD · Kim Callender, NP (FNP-BC)

Last medically reviewed: · This page is informational and does not constitute medical advice.