NAD+ IV therapy delivers nicotinamide adenine dinucleotide, a coenzyme central to cellular energy, directly into the bloodstream. NAD+ levels genuinely decline with age, and supplementation genuinely raises them. What is not established is whether raising them by IV produces the longevity and wellness benefits clinics advertise. No completed outcome trials have tested that. Results vary.
That is the version of this article most clinic pages will not write. It is also the version worth reading.
What does NAD+ actually do in your cells?
NAD+ (nicotinamide adenine dinucleotide) is a coenzyme present in every cell you have. Its primary job is shuttling electrons through the reactions that convert food into usable energy, which makes it foundational to metabolism rather than an optional add-on to it.
It also serves as fuel for two families of enzymes that consume it outright. Sirtuins use NAD+ to regulate gene expression and cellular stress responses. PARPs use it during DNA repair. Every time those enzymes work, NAD+ gets spent.
That dual role explains the attention. NAD+ sits at the intersection of energy production and cellular maintenance, two processes that visibly change as people age.
Why do NAD+ levels decline with age?
Levels fall over the decades under pressure from both sides. Production pathways become less efficient, while consumption rises as accumulated DNA damage and chronic inflammation keep PARPs and other NAD+-consuming enzymes busy.
A 2025 review published in Nature Aging, co-authored by more than 25 scientists including David Sinclair of Harvard and Evandro Fei Fang of the University of Oslo, identified NAD+ as a key molecule in aging biology and in neurodegenerative disease. Note what that is: a statement about the underlying biology. It is not an endorsement of any commercial infusion.
What does the evidence actually say?
The gap between the biology and the marketing is wide, and it is worth mapping precisely.
| Statement about NAD+ | Where the evidence stands |
|---|---|
| Central to cellular energy metabolism and to sirtuin and PARP function | Established biochemistry |
| Levels decline with age | Well documented |
| Supplementation can raise measurable NAD+ levels | Demonstrated in human studies |
| Select metabolic and inflammatory improvements in defined groups over weeks to months | Shown in some studies, not universal |
| IV or IM NAD+ improves wellness or longevity outcomes | No completed outcome trials |
| Slows human aging or reduces mortality | No long-term human data |
IV NAD+ is not FDA-approved for any condition. It operates under a wellness framework, which is a meaningful legal and scientific distinction from a treatment. NPR examined the marketing claims around NAD+ in May 2026 and found the enthusiasm running well ahead of the human data.
The commercial momentum is real regardless. The NAD+ IV clinic market was valued at roughly 511.9 million dollars in 2025, with projections above 1 billion by 2032. Rapid market growth is not evidence of efficacy. It is evidence of demand.
Why is NAD+ given by IV, and does the route matter?
The rationale is bioavailability. Intravenous delivery bypasses digestion and first-pass liver metabolism, putting the molecule directly into circulation at concentrations oral dosing cannot reach.
The counterpoint is uncomfortable and rarely stated: most of the published human research has used oral NAD+ precursors such as nicotinamide riboside and nicotinamide mononucleotide, not intravenous NAD+. The most commercially popular route is the one carrying the least trial evidence. Anyone selling you an infusion should be willing to say that out loud.
What is a NAD+ infusion actually like?
This is the practical part nobody warns first-timers about. NAD+ must be run slowly. Pushed too fast, it reliably produces chest tightness, facial flushing, nausea, and abdominal cramping.
Those sensations are related to infusion rate, not to an allergic reaction, and they typically ease within minutes once the drip is slowed. Which means the correct response is simple: say something immediately, and the rate comes down.
Plan on a long session. A NAD+ drip is measured in hours, not minutes, and any clinic promising a fast one is either using a small dose or is about to make you uncomfortable. Bring something to do.
Who seeks NAD+, and who should not have it?
The people who ask for it are usually longevity-focused, tracking their own biomarkers, and already doing the fundamentals well. Others come in chasing fatigue or mental fog.
That second group deserves a caution. Fatigue has common, findable, treatable causes: thyroid dysfunction, anemia, sleep apnea, depression, and low testosterone among them. Infusing NAD+ before anyone checks for those is expensive guessing. If low energy is the complaint, start with testosterone and hormone evaluation and basic labs.
Anyone who is pregnant or nursing, has kidney, liver, or cardiac disease, carries an active cancer diagnosis, or takes multiple medications should be medically evaluated before any infusion. Long-term human safety data on repeated IV NAD+ is limited, and that limitation deserves to be part of the conversation.
How is a physician-led approach different from a drip bar?
A drip bar sells a menu item. A physician-led practice runs an evaluation first, asks what problem you are actually trying to solve, and is willing to tell you that NAD+ is not the answer to it.
The other difference is expectation setting. No responsible physician promises an outcome here, because the outcome trials have not been run. What a physician can do is confirm you are an appropriate candidate, dose and rate the infusion properly, monitor you during it, and place it inside a broader plan rather than selling it as a standalone fix. See how peptides pair with NAD+ and IV therapy for how it fits alongside other tools, and why physician-led care matters for the standard to hold any clinic to.
If you are comparing providers, how to choose a clinic covers the questions worth asking, and our guide to what each IV drip contains decodes the rest of the menu.
Where to get NAD+ IV therapy near La Canada Flintridge
True Roots Performance & Aesthetics is a physician-led practice in La Canada Flintridge, California, serving patients across Pasadena, Glendale, and greater Los Angeles. Dr. Luis Valle, a board-certified physician, evaluates each patient before any infusion and sets expectations against what the evidence actually supports.
This article is educational and not a substitute for personalized medical advice.