Jinfiniti Review: What an NAD+ Test Can Actually Tell You

Jinfiniti Precision Medicine is not really a supplement company that happens to sell a test. It is a testing company — it runs a CLIA-certified lab in Augusta, Georgia that measures NAD+ inside your cells — and it also sells the supplements you would take after seeing the result. That structure is what makes it worth reviewing carefully, because it is genuinely different from every other brand on this site, and because the difference cuts both ways.

The pitch is seductive and, on its face, exactly what this site keeps asking for: stop guessing, measure. The problem is what happens after the number comes back. Everything below was read in a browser on August 30, 2026 on jinfiniti.com, including the Supplement Facts panel image and the accordions on the product pages, and every absence reported here was checked against PubMed the same day.

What Jinfiniti actually sells

Two things, sold as a loop.

The test. The Intracellular NAD® Test is a $198 at-home finger-prick kit using dried blood spots. It measures NAD+ inside cells rather than in plasma, is processed in Jinfiniti's own CLIA-certified lab, reports a result in micromolar (μM) with a dosing recommendation attached, and takes about a week. The site states an analytical precision of 3.1% CV and says roughly 100,000 tests have been run.

The supplements. On August 30, 2026 the NAD+ shop listed the Vitality ↑® NAD+ Booster in powder and lozenge form at $118 a jar one-time ($106.20/month on a monthly subscription, $94.33 a jar quarterly, $90.86 a jar twice-yearly), Pure NMN Powder at $58, and the NR² Vitality ↑ NAD+ Booster at $108 marked down to $78. Bundles run from a $257 mini starter to a $708 maintenance package, and the NAD+ Optimization® Membership is $198 for the first month (a test plus a jar) then $88 a month, with a second test arriving in month three.

Then there is the number that ties the loop together. Jinfiniti's shop page states that "optimal is a defined range, 40 to 100 micromolar," and that in the company's own trial 85% of participants reached optimal NAD levels within four weeks. The powder page claims an average 116% increase in NAD+ in four weeks; the lozenge page claims 150%, and describes itself as "twice better than best product on the market."

The uncomfortable finding: a precision company with a proprietary blend

Jinfiniti's entire identity is precision. "Precision Medicine" is in the company name. The quality page promises "pharmaceutical-grade ingredients at precise dosages." The whole argument for buying a $198 test is that guessing at a dose is unscientific.

So we opened the Supplement Facts panel on the Vitality ↑ NAD+ Booster Powder. Here is what it says, in full:

• •Serving size 1 g (about one scoop), 60 servings per container.
• •NMN Powder (β-nicotinamide mononucleotide): 500 mg.
• •"Proprietary Vitality Lift Blend": 500 mg — creatine monohydrate, D-ribose, niacinamide.
• •Daily Value not established.

Three of the product's four ingredients are inside a proprietary blend with no individual amounts disclosed. You are told that half of every scoop is creatine, D-ribose and niacinamide, in some ratio the company does not publish. That is the exact practice the precision pitch exists to condemn — and it matters practically, because niacinamide is itself an NAD+ precursor with its own dose-dependent methylation load (the reason people pair high precursor doses with TMG, which we cover in the NMN and TMG stack), and creatine at a meaningful dose is a different product than creatine at a token one. You cannot compare this formula against a plain NMN capsule, or against another brand, without those numbers.

A company that will sell you a lab test to avoid guesswork should not ask you to guess what is in its own scoop.

What an NAD+ test can and cannot tell you

This is the heart of the review, so let us be precise about it.

What the test can do. It can tell you a real, physically measured quantity: how much NAD+ is inside your cells at one moment, from one finger prick, on a validated assay run in a CLIA-certified lab. That is not nothing. NAD+ declines with age and sits at the center of cellular energy metabolism and DNA repair signaling ¹, and there is genuine value in a before-and-after number when you are spending real money on a precursor. It can also, in principle, tell you whether a given product is doing anything measurable in you — which is more than most supplement buyers ever learn. We put the same argument to readers in NAD+ before and after.

What the test cannot do. It cannot tell you that you will feel better at a higher number, because no published human trial has shown that titrating a person to a target intracellular NAD+ level improves any clinical outcome. That is the missing link, and it is load-bearing. The 2025 clinical overview of NAD+ interventions in Nature Aging — the most current summary of the field — concludes with an explicit call for large-scale studies to determine optimal dose, administration route and frequency, along with long-term safety and interindividual variability ². In other words, the thing the "optimal range" presupposes is the thing the field says is still unresolved.

So the sentence on Jinfiniti's test page — "Benefits are ONLY realized when NAD+ level is optimized" — is not a research finding. It is the premise that makes the loop work. And the loop is closed: the company that sells the test also defines what counts as optimal, also sells the product that moves you into the range, and also guarantees that you will get there.

That is not fraud, and it does not mean the number is fake. It means the reference range and the outcome claim come from the same party that benefits from both, and there is no independent trial you can check them against.

The efficacy numbers, and where they live

Jinfiniti's quality page says: "We don't just make claims. We measure results with precision testing and publish the data." So we went looking for the data.

On August 30, 2026 we searched PubMed through the NCBI E-utilities API. A search for "Jinfiniti" returns nine records — all of them Dr. Jin-Xiong She's earlier work in type 1 diabetes, oncology and biomarker discovery, none about NAD+ supplementation. A search for "Accuri Vitality Boost", the product's former name, returns zero. A search for "Vitality NAD booster" returns three unrelated papers. As a positive control in the same pass, a search for NMN randomized controlled trials returned nineteen — so the probe was working; it simply found nothing.

The conclusion is narrow and should be stated exactly: the 85%, 116% and 150% figures are company-reported and are not, as of this writing, findings in the peer-reviewed literature. They may be perfectly real internal results. They are not independently checkable, they have no published methods, sample size, blinding or comparator that a reader can inspect, and they should not be weighted like trial results.

There is a second wrinkle worth naming. The Vitality NAD+ Booster page carries a section headed "The research behind NAD+ Booster... validated through rigorous clinical research," listing six DOIs under "Peer Reviewed" badges. The two NAD-related ones resolve to a dose-ranging trial of plain NMN in healthy middle-aged adults ³ and the trial of plain NMN in prediabetic women ⁴. Both are real, good papers. Neither tested Jinfiniti's formula, and neither was run by Jinfiniti. The rest are creatine studies. That is borrowed single-ingredient research presented under a heading that says "the research behind" this product — the same structural problem we flagged in our Qualia NAD+ review, where a multi-ingredient stack inherits the credibility of each component without the finished formula ever being tested.

The evidence that does apply

Strip away the branding and Jinfiniti's formula is NMN plus niacinamide plus two energy-metabolism ingredients. The NMN part has a real evidence base, and it is the same one that applies to every NMN product: oral NMN reliably raises blood NAD+ and is well tolerated at studied doses ³⁵, and its NR sibling does the same ⁶. That is the proven half.

The unproven half is the half everyone actually wants. A 2025 systematic review and meta-analysis of NMN and NR found no reliable improvement in skeletal muscle mass or function when trials were pooled ⁷. The softer human signals — maintained walking speed, better self-reported sleep in older adults ⁸ — are small and subjective. So even a buyer who tests, supplements, retests and lands squarely in the 40–100 μM band has demonstrated one thing: that the number moved. Whether the person feels or ages differently is a separate question the biomarker does not answer. We work through that gap in does NMN actually work? and the NAD+ therapy evidence pillar.

What the loop costs

Run the brand's own numbers. A jar is 60 servings. Jinfiniti's stated guidance for someone who has not tested is one scoop in the morning and one in the evening — two servings a day, so a jar is 30 days. At the one-time price that is $118 a month, or $106.20 on the monthly subscription. The label permits up to four servings a day, which halves the jar to 15 days and doubles the monthly cost to roughly $236.

Add testing. Twelve months of powder plus two tests at list runs about $1,812. The membership is the cheaper path to the same place: $198 for month one, then $88 a month, which comes to about $1,166 for the year with two tests included. Either way this is one of the most expensive ways to take NMN that we track — Jinfiniti's own Pure NMN Powder at $58 is on the same shelf, and a plain NMN capsule from another brand costs a fraction of the blend. For the price ladder across the category, see best NMN supplements and the NAD+ price index.

Where Jinfiniti genuinely does better

To be even-handed, several things here are above the category average and should be said plainly:

• •It measures something. A CLIA-certified, high-complexity lab dedicated to NAD+ measurement is a real asset, and dried-blood-spot intracellular measurement is a harder, more meaningful thing to run than a plasma proxy.
• •It publishes a Supplement Facts panel with the NMN dose named — 500 mg — which is more than several blends on this site do, even if the other half of the scoop is hidden.
• •Its disclaimer is unusually direct. Every page footer states that NAD+ test results should not be used for medical decisions without a healthcare provider. That is the right sentence, and it is not buried.
• •It tells you to retest. The instruction to test four weeks after starting, then adjust, is methodologically better behavior than any brand that simply sells you a bottle and wishes you luck.

And the alternative Jinfiniti positions itself against — infusions and injections — really is worse-evidenced, not better: see NAD+ IV therapy evidence and NAD+ injections evidence.

Is Jinfiniti worth it?

• •What you are reliably buying: a real, lab-run measurement of intracellular NAD+ before and after supplementation, plus an NMN-based formula whose NMN dose is disclosed and whose NMN component has genuine human trials behind it.
• •What you are not buying: evidence that hitting 40–100 μM makes you healthier, published data behind the 85%/116%/150% figures, or knowledge of what three of the four ingredients in your scoop actually weigh.
• •The structural caveat: the seller of the test defines the target the test is scored against and sells the product that hits it. Nothing independent closes that circle.

The fair verdict: if you find it genuinely useful to watch a number move and you can afford roughly $1,200 to $1,800 a year, Jinfiniti is a coherent, competently run version of that idea — and the only brand we review that will actually measure you. But you are buying confirmation that a biomarker changed, not evidence that changing it changed you, and a company selling precision should not be hiding three of four doses in a proprietary blend. If the appeal is simply "is my NMN working," the cheaper honest answer is that oral NMN essentially always raises blood NAD+ ³⁵; the test mostly tells you something the trials already predict.

Bottom line

Jinfiniti is the rare NAD+ company that measures rather than asserts, and its CLIA-certified intracellular NAD+ test is a real instrument, not a gimmick. But the loop it sits inside is closed: Jinfiniti defines the optimal range, sells the product that reaches it, and guarantees the result — while the claim underneath it all, that benefits arrive only once NAD+ is "optimized," has no human outcome trial behind it, and the field's own 2025 review says optimal dosing is still unsettled ². The efficacy numbers are company-reported and absent from the literature. And the formula that is supposed to embody precision puts creatine, D-ribose and niacinamide into an undisclosed 500 mg proprietary blend. Measure if it helps you stay consistent. Do not mistake a number in range for a proven benefit.

For the wider picture, read NAD+ therapy: what the evidence shows, NMN vs NR and the NAD+ dosage guide; for brands read on the same terms, see our Tru Niagen review, Qualia NAD+ review and Renue By Science review; and for the full ranked shelf, best NAD+ supplements and the NAD+ rankings hub.

This is consumer education, not medical advice. These are dietary supplements and a wellness test, not FDA-approved drugs or a diagnostic. If you are pregnant, nursing, taking medication or managing a medical condition, talk to a clinician before acting on any NAD+ result.