Longevity Supplement Testing Transparency Report
Comparison of COA visibility, independent testing, GMP and certifications across longevity supplements.
Why Phase 3 separates the scores
Transparency, testing, evidence match, value and formula complexity answer different questions. Combining them into one mega-score would require arbitrary weighting and would hide the tradeoffs that matter to real buyers.
Ingredient evidence is not finished-product evidence
A commercial product can contain an ingredient supported by human research without the exact retail formula ever being tested. Phase 3 records that distinction explicitly rather than allowing a finished supplement to borrow every claim associated with its ingredients.
Why product identity matters
The NAD+ category now contains NMN powders, liposomal capsules, fast-dissolve products, sublingual gels and branded nicotinamide riboside. Likewise, spermidine products range from food-derived low-dose formulas to much higher-strength products. Ingredient name alone is not enough to establish equivalence.
Why current testing documents matter
A visible batch-specific COA is more auditable than a generic claim that testing occurs. Testing can support identity, potency or contaminant control, but it does not prove that a supplement produces a desired health outcome.
Why price comparisons need boundaries
Cost per milligram is useful only inside a comparable ingredient family and only when dose and current price are both known. Comparing milligrams of unrelated compounds produces a neat spreadsheet and a meaningless conclusion.
How formula complexity changes the burden of proof
A focused single-active product is easier to map to ingredient research. A multi-active stack can be convenient, but the more ingredients it contains, the more assumptions are required about dose sufficiency, interactions and whether the exact combination has ever been studied.
What a lower score actually means
A lower transparency or testing score means the reviewed public evidence is less complete or less auditable. It does not prove hidden product quality is poor. Phase 3 scores what can be verified, not what might exist behind the scenes.
How to use these reports before buying
Verify the current label, active amount, serving size, ingredient form, batch documentation, warnings, current price and seller. For decisions involving medications or medical conditions, product research should be combined with qualified professional advice.
Why the rankings can change
Prices, formulas, pack sizes, certifications and batch documents change. Phase 3 is a dated market snapshot and should be updated when those inputs change rather than pretending a 2026 ranking is permanent.
What Phase 3 does not claim
The database does not prove that a product reverses aging, prevents disease or extends lifespan. Its scores describe commercial auditability and evidence relationships, not personal medical outcomes.
Testing comparison
| Product | Testing | COA | Certifications | Score |
|---|---|---|---|---|
| Renue By Science — Liposomal NMN Capsules | Every batch independently tested in U.S. laboratories | Visible current batch COAs | FDA-registered U.S. processing/testing/packaging stated | 9/10 |
| Oxford Healthspan — Primeadine GF | Third-party tested in Japan and USA | Visible current lot documentation | GMP; ISO22000 | 9/10 |
| Double Wood — NMN - Current Verified Batch | ISO/IEC 17025-accredited third-party testing | Visible current batch COA | cGMP U.S. facility | 9/10 |
| Tru Niagen — Tru Niagen 300 mg | Independent ISO 17025 verification / brand quality program | Not captured as consumer batch COA | FDA-notified; Halal; Kosher; safety-tested | 8/10 |
| ProHealth Longevity — Pure Spermidine | Third-party tested | Visible | Not captured | 7/10 |
| Renue By Science — NMN Pure Powder | Third-party tested | Visible | Not captured | 7/10 |
| ProHealth Longevity — NMN Pro Powder - Uthever | Third-party tested | Visible | Not captured | 7/10 |
| Double Wood — NMN Supplement | Third-party tested | Visible | Not captured | 7/10 |
| Double Wood — Resveratrol Supplement | Third-party tested | Visible | Not captured | 7/10 |
| Double Wood — Quercetin with Bromelain | Third-party tested | Visible | Not captured | 7/10 |
| Toniiq — Spermidine+ | 5-point third-party testing program | Visible | Third-party lot testing | 7/10 |
| Double Wood — Spermidine Supplement | Third-party tested | Visible | Not captured | 7/10 |
| Tru Niagen — Tru Niagen 300 mg Stick Packs | Third-party quality testing stated | Not captured | NSF Certified for Sport; FDA-notified; Halal; Kosher | 6/10 |
| Renue By Science — NMN Resveratrol Gel | Batch testing disclosed | Visible | FDA-registered U.S. processing/testing/packaging stated | 5/10 |
| ProHealth Longevity — Trans-Resveratrol Plus 1,000 mg | Brand-wide triple lab testing positioning | Not captured for current batch | USA manufactured / GMP brand standard | 5/10 |
| DoNotAge — Pure Spermidine | Third-party tested | Not captured | Not captured | 4/10 |
| DoNotAge — Pure NMN | Third-party tested | Not captured | Not captured | 4/10 |
| Double Wood — Longevity Stack | Brand-wide third-party testing positioning | Varies by component | Not captured | 4/10 |
| spermidineLIFE — Original 365+ | Internal + independent Austrian lab testing | Not directly captured | Vegan | 4/10 |
| spermidineLIFE — Boost+ | Internal + independent Austrian lab testing | Not directly captured | Vegan | 4/10 |
| Double Wood — Anti-Aging Bundle | Brand states third-party testing | Varies by component | Brand quality program | 4/10 |
| spermidineLIFE — nadLIFE Energy+ | Internal + independent Austrian lab testing | Not directly captured | Vegan | 4/10 |
| DoNotAge — Pure Resveratrol | Third-party tested | Not captured | Not captured | 4/10 |
| DoNotAge — Pure Quercetin | Third-party tested | Not captured | Not captured | 4/10 |
| ProHealth Longevity — Pure Trans-Resveratrol Micronized Powder - 30 g | Brand-wide triple lab testing positioning | Brand publishes COAs for many products | USA manufactured / GMP brand standard | 4/10 |
| Tru Niagen — Tru Niagen Pro 1,000 mg | Brand quality/testing program | Not captured | Practitioner product; FDA-notified ingredient context | 2/10 |
| Renue By Science — NMN Fast Dissolve Tabs | Brand-wide batch testing policy | Brand publishes finished-product batch tests | FDA-registered U.S. processing/testing/packaging stated | 2/10 |
| ProHealth Longevity — Trans-Resveratrol Plus | Not captured | Not captured | Not captured | 0/10 |
| DoNotAge — 15 Longevity Supplements in 1 Daily Sachet | Not captured | Not captured | Not captured | 0/10 |
| ProHealth Longevity — NMN Pro Complete | Not captured | Not captured | Not captured | 0/10 |
Why Phase 3 separates the scores 1
Transparency, testing, evidence match, value and formula complexity answer different questions. Combining them into one mega-score would require arbitrary weighting and would hide the tradeoffs that matter to real buyers.
Ingredient evidence is not finished-product evidence 2
A commercial product can contain an ingredient supported by human research without the exact retail formula ever being tested. Phase 3 records that distinction explicitly rather than allowing a finished supplement to borrow every claim associated with its ingredients.
Why product identity matters 3
The NAD+ category now contains NMN powders, liposomal capsules, fast-dissolve products, sublingual gels and branded nicotinamide riboside. Likewise, spermidine products range from food-derived low-dose formulas to much higher-strength products. Ingredient name alone is not enough to establish equivalence.
Why current testing documents matter 4
A visible batch-specific COA is more auditable than a generic claim that testing occurs. Testing can support identity, potency or contaminant control, but it does not prove that a supplement produces a desired health outcome.
Why price comparisons need boundaries 5
Cost per milligram is useful only inside a comparable ingredient family and only when dose and current price are both known. Comparing milligrams of unrelated compounds produces a neat spreadsheet and a meaningless conclusion.
How formula complexity changes the burden of proof 6
A focused single-active product is easier to map to ingredient research. A multi-active stack can be convenient, but the more ingredients it contains, the more assumptions are required about dose sufficiency, interactions and whether the exact combination has ever been studied.
What a lower score actually means 7
A lower transparency or testing score means the reviewed public evidence is less complete or less auditable. It does not prove hidden product quality is poor. Phase 3 scores what can be verified, not what might exist behind the scenes.