Best NR 2026: Tru Niagen vs. Thorne NiaCel — Only Two Options
Informational summary — not medical advice. This page ranks product trustworthiness and value at a given dose; on whether NR works, see the hub and the honest evidence breakdown. This statement has not been evaluated by the FDA.
NR's buying reality is a near-duopoly, not a marketplace. We checked several generic NR listings commonly recommended online; the ones with a live, current price came down to two: Tru Niagen 300mg, the Niagen-branded flagship, and Thorne NiaCel 400, an NSF Certified for Sport alternative using Thorne's own NR form. That scarcity likely traces to NR's patent-enforcement history (ChromaDex has pursued multiple sellers over NR composition-of-matter patents), not a lack of demand. This page ranks the two real options by cost per mg — and discloses the resolved 2021-2024 ChromaDex/Thorne litigation as context, not a red flag.
As an Amazon Associate we earn from qualifying purchases. Ranked by cost per mg between the two live-verified products, never commissions.
The one-line takeaway There isn't a long list to rank here — there are two reliable options, and the honest thing to do is say so. Tru Niagen is cheaper per mg and carries the manufacturer's own dose-response/safety data; Thorne NiaCel costs more per mg but adds NSF Certified for Sport third-party testing and a different (non-Niagen) NR source. Both fall short of the 1,000 mg/day dose most functional trials used — see the dosage guide before assuming either matches a specific trial's dose.
The two products, compared
Both disclose NR milligrams directly on the label, so cost per mg is a real, computable number. Full data is a public CC BY JSON file.
| Product | Form | mg/serving | $/day | $/mg | Niagen? |
|---|---|---|---|---|---|
| Thorne NiaCel 400 | Capsule (NR hydrogen malate) | 415 mg | $1.23 | $0.0030 | No |
| Tru Niagen 300mg | Capsule | 300 mg | $1.63 | $0.0054 | Yes |
Prices are live Amazon buy-box figures, July 2026; they move. Cost per day assumes 1 serving/day. Cost per mg = price ÷ (servings × mg per serving). Both products' per-serving dose is below the 1000 mg/day dose most functional trials used (Martens, Elhassan, NADPARK).
Niagen-branded vs. generic: a provenance fact, not a superiority claim
Tru Niagen 300mg uses Niagen, the ChromaDex/Niagen Bioscience branded NR raw material behind Conze 2019, the manufacturer's own dose-response and safety trial (100/300/1000 mg/day, NAD+ rose 22%/51%/142%). That's a real, traceable dataset, but it's a safety and dose-response trial run by the ingredient's own maker — disclose that conflict of interest every time it's cited. Niagen is not confirmed to be the specific NR source used in the five independent academic efficacy trials this cluster covers (Martens, Dollerup twice, Elhassan, NADPARK, Wang); their methods sections weren't individually re-verified for raw-material sourcing here. So the honest framing of Niagen's advantage is "cleanest regulatory paper trail plus a manufacturer-run safety/dose-response dataset" — not "proven more effective in independent trials."
Thorne NiaCel 400 takes a different route: Thorne's own NR hydrogen malate form, not Niagen, backed by NSF Certified for Sport status and third-party testing — a real, independently verifiable quality signal that Tru Niagen's listing doesn't carry in the same form. Neither provenance fact tells you which product performs better in a human trial; they tell you what kind of paper trail you're buying into.
The ChromaDex/Thorne patent litigation (resolved, 2021-2024)
ChromaDex sued Thorne in 2021 over NiaCel, alleging the product infringed ChromaDex's NR composition-of-matter patents. The suit was dismissed in January 2024, after the underlying NR patents were ruled patent-ineligible in a related Federal Circuit case (ChromaDex v. Elysium). That's the reason NiaCel isn't Niagen-branded: Thorne uses its own NR hydrogen malate formulation instead of licensing ChromaDex's ingredient.
This is disclosable, resolved history — the case ended on patent-law grounds, not because of any product-safety or quality finding against Thorne. It's included here as context for why two chemically related but differently sourced NR products exist on the market, not as a smear on either company.
Frequently asked questions
What is the best NR supplement?
Between the two live-verified options, Thorne NiaCel 400 is cheaper per mg. Tru Niagen carries the Niagen dose-response dataset; Thorne NiaCel adds NSF Certified for Sport testing on a different NR source.
Why are only two NR products ranked here?
Live-price verification found only two currently buyable listings. Several generic NR products checked were out of stock or delisted — likely tied to NR's patent-enforcement history.
What's the ChromaDex/Thorne lawsuit?
Filed 2021, dismissed January 2024 after the underlying NR patents were ruled patent-ineligible. Resolved patent-law history, not a product-quality flag.
Does the Niagen brand mean better results?
It means a traceable, manufacturer-run safety/dose-response dataset and the cleanest regulatory history — not proven superior effectiveness versus other NR sources.
Related
- NR: what it is & the regulatory story
- NR dosage guide — the 100-2,000 mg trial range vs. the retail dose gap
- NR for raising NAD+
- Does NR actually do anything beyond raising NAD+?
Sources
- Manufacturer labels and live Amazon pricing for both listed products, July 2026. Full dataset: /nr/cost-by-brand.json (CC BY 4.0).
- Conze D, Brenner C, Kruger CL. "Safety and Metabolism of Long-term Administration of NIAGEN (Nicotinamide Riboside Chloride)." Scientific Reports. 2019. PMID: 31278280 (ChromaDex-funded; disclosed conflict of interest.)
- ChromaDex, Inc. v. Thorne Research, Inc., filed 2021, dismissed January 2024; related Federal Circuit ruling, ChromaDex, Inc. v. Elysium Health, Inc. (public court record, cited as resolved litigation history).