NAD Test Kits: How to Measure Your NAD+ Levels at Home

Short answer A NAD test kit measures how much NAD+ your blood contains, usually from a finger-prick sample you mail to a lab, and some kits also report NADH and NAD total. People use it to set a baseline and re-check it over time, often around a supplement. One honest caveat up front: blood NAD+ is not a validated clinical biomarker, so treat the number as wellness information to discuss with a provider, not a diagnosis.

NAD+ has become one of the most talked-about molecules in the longevity world, and the shelves are full of NMN and NR supplements that promise to raise it. Yet most people start taking those supplements without ever measuring where their NAD+ actually sits, which means they have no way to tell whether anything changed. A NAD test kit is the measure-first alternative. This guide explains what a kit measures, how at-home testing works, how accurate it really is, and what the result can and cannot tell you. For the basics of self-collected testing, see our complete guide to at-home blood testing.

What is a NAD test kit, and what does it measure?

A NAD test kit is an at-home collection kit that lets you send a small blood sample to a laboratory, which then measures the amount of NAD in your blood. NAD (nicotinamide adenine dinucleotide) is a coenzyme your cells use for energy metabolism and many other processes. Kits differ in exactly what they report:

Boomerang's NAD Longevity Blueprint is one example that reports NAD+, NADH, and NAD total. Whichever kit you choose, check which forms it measures so you know what you are paying for.

Why would you test your NAD+ levels?

The main reason is to replace guessing with a number you can track. Research in humans and animals shows that NAD+ tends to decline with age: a 2020 review in Nature Reviews Molecular Cell Biology reports that ageing is accompanied by a gradual decline in tissue and cellular NAD+ levels in multiple organisms, including humans. That decline is mostly documented in tissues such as muscle and skin rather than in whole blood, so a blood test is an accessible proxy, not a direct readout of every tissue.

Be clear-eyed about the limits. Blood NAD+ is not an established clinical biomarker, there is no proven health outcome tied to a particular level, and testing is best understood as wellness tracking rather than a medical test. It is most useful for people who want a personal baseline and a way to see whether their own number moves over time.

How to test your NAD levels at home

At-home NAD testing follows the same path as any mail-in lab test. The steps are simple:

1. Order a kit and register it when it arrives.
2. Collect your sample with the included finger-prick device, following the instructions exactly.
3. Mail it back in the prepaid mailer the same day you collect it.
4. Read your results in the app or portal once the lab finishes processing.

The lab that runs the sample matters more than the kit's packaging. In the United States, any facility that tests human samples for health purposes must meet federal quality standards. The CDC notes that CLIA applies to all U.S. facilities testing human specimens, and the program is run by the Centers for Medicare & Medicaid Services to ensure quality results. Confirm the kit you choose is processed by a CLIA-certified lab.

Are NAD test kits accurate?

Accuracy depends heavily on how the sample is collected and how quickly it is handled, because NAD is chemically unstable in blood and can degrade after collection. That makes careful collection, prompt return shipping, and a lab that processes samples quickly genuinely important for a meaningful NAD result. It is also why an in-house lab with a fast turnaround can be an advantage for this particular marker.

One more honesty point: most at-home kits measure NAD in whole blood, which is not necessarily the same as the intracellular NAD inside your tissues, where the coenzyme does its work. A blood NAD+ number is a useful, accessible signal, but it is a proxy. If you want context on how at-home samples compare with clinic draws in general, see our piece on how accurate at-home blood tests are.

What do NAD test results mean?

There is no official, universally agreed normal range for blood NAD+. Reference ranges differ by laboratory and testing method, and MedlinePlus notes that what counts as a normal range differs from person to person and that many factors affect results. For that reason, your most useful comparison is usually your own previous result, not someone else's number or an online chart. A NAD result is information to interpret with a qualified healthcare provider, and it is not intended to diagnose, treat, cure, or prevent any disease.

Testing NAD before and after NMN or NR supplements

This is where a baseline earns its keep. Human trials show that NAD precursors can raise blood NAD+: a 2022 randomized controlled trial in GeroScience found that daily NMN significantly increased blood NAD+ concentrations in healthy middle-aged adults and was well tolerated at doses up to 900 mg per day. Separately, a 2021 randomized trial in Science reported that NMN improved muscle insulin sensitivity in prediabetic, postmenopausal women, a specific finding in a specific group rather than a general anti-aging result.

Two caveats keep this honest. Raising blood NAD+ is not the same as a proven improvement in energy, longevity, or healthspan, and NMN and NR are not FDA-approved to prevent or treat any condition. Individual response also varies. If you want to know whether a supplement moved your own NAD+, the practical approach is to test a baseline, start the supplement, and re-test after about 8 to 12 weeks, then discuss the change with your provider.

How much does a NAD test kit cost?

At-home NAD tests generally cost more than routine panels because the assay is specialized. Prices vary by provider and by how many forms of NAD are reported. As one example, Boomerang's NAD Longevity Blueprint, which reports NAD+, NADH, and NAD total, is priced around $299. Compare what each kit measures, the lab behind it, and the turnaround before you decide.

The takeaway: a NAD test kit will not tell you how long you will live, and it is not a diagnosis. What it can do is replace guesswork with your own baseline, so that if you choose to try an NAD-boosting supplement you can actually see whether your number moved. Measure first, discuss the result with your provider, and decide from there.