NAD+ is a coenzyme your cells need to make energy, and levels fall as you age. Here is what NAD+ therapy can and cannot do, and who tends to benefit most.
Interest in NAD+ has exploded in longevity circles, but the marketing often runs well ahead of the science. Here is our honest take.
What NAD+ Actually Does
NAD+ stands for nicotinamide adenine dinucleotide. It powers energy production in every cell in your body. Without it, your mitochondria cannot turn food into usable energy.
It also fuels enzymes involved in DNA repair and healthy aging. Those enzymes consume NAD+ as they work, which means the more repair your body is doing, the more NAD+ it uses up.
By midlife, your NAD+ levels may be roughly half of what they were in your twenties. That decline has been linked to fatigue, slower recovery, and age-related changes.
Why Levels Fall
Aging is part of it, but not all of it. Chronic inflammation, heavy alcohol use, poor sleep, obesity, and ongoing illness all increase demand and speed the decline.
This matters practically. If something is draining your NAD+ faster than normal, addressing that does more than topping it up from outside.
Who Tends to Benefit
Patients often explore NAD+ support for persistent fatigue, brain fog, poor recovery after illness or exertion, and as part of a broader longevity strategy.
In our experience it tends to help most when fatigue has a metabolic flavor: you recover slowly, your stamina is down, and the usual causes have already been ruled out.
Some people feel a noticeable lift in energy and mental clarity. Others notice more gradual changes. A few feel nothing at all, and that is worth knowing before you spend money on it.
Honest Expectations
NAD+ is a tool, not a miracle. The research in humans is still early. Most of the striking results you have read about come from animal studies, and animal results often do not translate.
What we can say: it is reasonably well studied for safety, some people clearly feel better, and it is not a substitute for sleep, protein, or treating an actual diagnosis.
If your fatigue is caused by low thyroid, sleep apnea, low iron, or depression, NAD+ will not fix it. This is why we check those first.
The Delivery Question
How you take it matters more than most marketing admits.
- Oral precursors. Supplements like NR and NMN are convenient and inexpensive. They raise NAD+ levels modestly.
- Subcutaneous injection. A small injection under the skin. Better absorption than oral, done at home, far less time than an IV.
- IV infusion. Delivers the most directly. It is also the most expensive and takes hours, and infusing too quickly causes chest tightness and nausea, so it must be run slowly.
We usually start with the least invasive option that is likely to work for your situation rather than sending everyone to an IV chair.
What We Check First
Before recommending NAD+ for fatigue, we run a full workup: thyroid with Free T3, iron and ferritin, B12, vitamin D, blood sugar and insulin, inflammation markers, and hormones.
Often we find something treatable. Fixing that is cheaper and more effective than any NAD+ protocol. If the workup is clean and you are still exhausted, NAD+ becomes a more reasonable thing to try.
Our Bottom Line
NAD+ is promising and worth considering, especially as part of a wider plan that includes sleep, strength training, protein, and treating what your labs actually show.
It is not worth going into debt over, and it is not a reason to skip a proper workup. Anyone selling it as a cure for aging is ahead of the evidence.
What You Can Do Without Buying Anything
Several things support NAD+ levels for free. Regular exercise, especially intervals, raises NAD+ through the same pathways supplements aim at. Going without food for a stretch, whether overnight or longer, has a similar effect.
Reducing alcohol helps, since processing it consumes NAD+ directly. So does treating chronic inflammation and sleeping properly.
None of this is as exciting as an IV, and all of it does more for most people.
Safety
NAD+ and its precursors are generally well tolerated. Flushing, nausea, and chest tightness during an infusion are almost always signs it is running too fast, and slowing the drip resolves them.
The long-term safety data in humans is still limited. If you have an active cancer diagnosis, discuss it with your oncologist first, since the effects on cell growth are not fully understood.
We offer NAD+ therapy and longevity care by telehealth across Washington and Idaho from our clinic in Spokane. Book a free 15-minute call and we will give you a straight answer about whether it makes sense for you.