One product, one panel, one record.
GNC Probiotic Solutions Men's — 30 Billion CFUs — label audit
The four strains in the men's product are the identical Lab4 consortium GNC sells in its women's product — which gets a fifth strain and twice the capsules — and the consortium's confirmatory trial enrolled 70 women and no men, after the manufacturer's own post-hoc found the effect strongest in the female subgroup.
This page is an audit of a label. It records what this product’s panel discloses, what of that could be checked against a primary record, and what could not. The score below ranks this product on that disclosure and on nothing else.
The record this page rests on
- NIH label record
- Label read on
- The most recent dated artefact behind this page. Labels change; this is how old our reading of it is.
- Cohort
- D₂₇ founding teardown One of the 27 products taken apart at label level. That cohort is frozen and dated, so the audit’s published percentages cannot silently move.
- How deep this went
- Full forensic teardown Panel transcribed, every strain designator queried, every certification chased to its issuer’s own register, and the literature behind each marketing claim opened and read.
The Label Verifiability Score for this product
76.7 out of 100
Rank 39 of the 154 products in this audit the rubric can score. This rank is shared with 6 other products — 7 products sit on 76.7 and are tied. They hold the position jointly; no tiebreaker is applied, because every tiebreaker available here would be a number the rubric deliberately refused to weigh, smuggled back in to make a list look tidier.
The score measures one thing: how much of what you are buying this company tells you, and how much of that survives being checked against a source that is not the company. It does not measure whether the product works — this site holds no efficacy data of its own, and 0 of 294 organism slots in the founding cohort carry a strain with a human randomised trial for any male-specific outcome, so nobody in this category has evidence that would support a ranking by effect.
Computed over 86% of the rubric by weight — the share of the five questions below this record could answer. The remaining question is unanswered, and unanswered is not nought: it leaves the divisor rather than dragging the score down. That share travels with the number and is never dropped — this score over 86% of the weight and the same score over all of it are different claims.
| Component | Weight | What was counted, and where | Fraction | Weight × fraction |
|---|---|---|---|---|
| Strain identity printed on the panel | 0.24 | 4 of 4 organism slots carry a printed strain designator. | 4 / 4 = 1.0000 | 0.2400 |
| Per-organism amount printed | 0.20 | 0 of 4 organism slots have an amount of its own; the rest are inside a blend total. | 0 / 4 = 0.0000 | 0.0000 |
| What the CFU count is measured against | 0.22 | Potency basis "through-expiry": CFU figure printed yes, single basis stated yes, basis reaches expiry yes — 3 of 3. | 3 / 3 = 1.0000 | 0.2200 |
| Printed designators that lead to a human trial | 0.20 | 4 of 4 checked organism slots resolve to at least one human randomised trial under the designator exactly as printed. This counts whether the identity leads to a trial, never what the trial found. | 4 / 4 = 1.0000 | 0.2000 |
| Certification confirmed at the issuer’s own register | 0.14 | Every certification on this record is brand-asserted with the register unreachable, or not yet queried. An unreachable register is a fact about the verification infrastructure, not about this brand, so it may not move its position. | Not answered | — excluded from the divisor, not counted as nought |
0.6600 — the last column added up — divided by 0.86, the weight this record could answer, is 0.7674. Multiplied by 100 and rounded to one decimal, that is the 76.7 above.
See this product’s row in the full ranking, alongside the other 153 scored products, or read what each of the five components asks and how to check it .
What this label discloses
Everything in this table is what the product itself states — on the printed panel, on the brand’s own page, or in the label record the manufacturer filed. Nothing in it is checked yet; checking is the next section.
| Disclosure | As recorded |
|---|---|
| CFU as printed | 30 Billion Active Cultures (Men's Probiotic Blend) |
| What that count is measured against | Through expiry |
| Strain designators | All organisms coded |
| Organism slots transcribed here | 4 — the full panel |
| Marketed as | Marketed to men |
Guaranteed potency through expiration date — and: "Probiotic Solutions Men's has been tested to ensure the full 30 billion cultures in each dose are live and active when used by the expiration date.""
The panel’s own words on potency, verbatim.
The panel guarantees the count through the expiration or best-by date. This is the only basis that is falsifiable by a reader holding the bottle.
Every organism on the panel carries a printed strain designator. Whether those designators lead anywhere is a separate question, answered below.
| Organism as printed | Designator as printed | Quantity as printed | What the designator resolves to | The query we ran |
|---|---|---|---|---|
| Lactobacillus acidophilus | CUL-60 | NP (not provided) | Human RCT | "Lab4" AND probiotic |
| Lactobacillus acidophilus | CUL-21 | NP (not provided) | Human RCT | — |
| Bifidobacterium bifidum | CUL-20 | NP (not provided) | Human RCT | — |
| Bifidobacterium animalis subsp. lactis | CUL-34 | NP (not provided) | Human RCT | — |
What of that is verifiable
A disclosure is verifiable when a reader can open a record that neither we nor the brand controls and see the same thing. Below is every dated artefact this page rests on. What is absent from this list is not verified, however reasonable it sounds.
- NIH Dietary Supplement Label Database record — DSLD 315325 (opens in a new tab) captured Entered 2024-10-24, on-market flag: No. The FDA-filed record carrying all four CUL- designators, the saw palmetto and lycopene amounts, the through-expiry statement and the "Made in the UK" line. Re-pulled during the audit and confirmed exactly.
- NIH Dietary Supplement Label Database record — DSLD 77203 (opens in a new tab) captured Women's comparator: same four Lab4 strains plus L. gasseri CUL-09, 60 capsules, cranberry 200 mg.
How many of its strains have a human trial for what it is sold for
Across the frozen founding cohort, 0 of 294 organism slots (0.0%) carry an organism with a human randomised controlled trial for any male-specific outcome. Not for this product — for all 27 of the founding teardowns, taken together. That is the number to hold against any men’s probiotic, including this one.
Two further founding-cohort figures for context: only 43 of 294 organism slots carry a strain with any human RCT at all under the exact code printed on the label, and only 2 of 27 products have a published human trial of the finished formula — the thing actually in the bottle. All three figures divide by the frozen cohort of 27 teardowns and 294 organism slots, never by every teardown on this site.
For this product specifically, 4 organism slots carry a strain with a human RCT under the exact designator printed on the label.
A word on what a designator has to clear before it counts here. The organism must be named with the exact strain code that appears in the trial, the trial must be in humans, and the code must return that trial when a reader searches it. A species name does not qualify: the trials in this field are of strains, and a species contains thousands of them.
What it costs per day
What certification it holds, checked at the issuer’s own register
A badge on a bottle is a claim like any other. Every row below was checked — or not checked — at the certifier’s own public register, never at the badge. Across the frozen founding cohort, 2 of 27 products hold a certification we could confirm at the issuer — a founding-cohort figure, not a count over every teardown on this site.
| Programme | Status at the issuer | Checked |
|---|---|---|
| None claimed | Not checked | not checked |
None claimed
We have not queried this register for this product. It does not mean the product holds nothing.
No NSF, USP, Informed Choice or ConsumerLab mark appears on the DSLD record or on retail listings. GNC's "Guaranteed potency" is a first-party assertion backed by GNC's own in-house testing programme, which is not third-party certification. There is nothing to verify at an issuer because nothing is claimed — which is honest, and also means a buyer has no external check.
How it differs from the same brand’s women’s version
Across the fourteen same-brand men’s-versus-women’s label diffs run inside the frozen founding cohort, zero men’s or default formulas contain a probiotic strain, identified by designator, that was selected on male-specific evidence. In eight of the fourteen the sex-specific differentiator is a botanical or a mineral, and in five of the fourteen the women’s SKU is better-specified, cheaper, or both — “better-specified” meaning the panel that discloses more, never the panel with more in it. The rule behind each of those counts, and all fourteen pairs classified against it , are published in full. Diffs run on teardowns added since sit outside this fourteen, and outside the sentence above.
Compared against GNC Probiotic Solutions Women's. Diffed .
What the two panels differ by
- The women's product carries a fifth strain, Lactobacillus gasseri CUL-09, in a Women's Health Blend. The men's gets no analogous men-specific strain. DSLD 315325 versus DSLD 77203
- Men's ships 30 capsules; women's ships 60 — a 30-day versus a 60-day supply. DSLD 315325 versus DSLD 77203
- Men's botanicals are saw palmetto berry extract 303 mg (with 136 mg of fatty acids nested inside it) plus lycopene 10 mg. Women's is cranberry fruit extract 200 mg. DSLD 315325 versus DSLD 77203
What is identical across the pair
- The Lab4 core is identical: L. acidophilus CUL-60, L. acidophilus CUL-21, B. bifidum CUL-20, B. animalis subsp. lactis CUL-34.
- 30 billion CFU, guaranteed through expiration date, one capsule, in both.
- Both records carry "Made in the UK".
Every finding on this page, with the record behind it
Finding 1 product-delisted-from-gncs-own-site
The briefed product URL returns HTTP 301 with a Location header pointing at gnc.com/disco-offline/424654.html ("disco" is GNC's URL scheme for discontinued), which then 404s. GNC no longer sells this product on its own site; it survives on third-party marketplaces and in the DSLD archive. Any listicle currently ranking it as a live buy recommendation is out of date.
The record: HTTP 301 Location header on gnc.com/probiotics-for-men/424654.html, reproduced 2026-07-30
Finding 2 clinically-studied-doing-sex-inverted-work
The Lab4 consortium's strongest data is in an all-female trial. The 2024 confirmatory study enrolled 70 women and zero men, and its own background section says why, verbatim: "A previous exploratory study demonstrated the ability of the Lab4 probiotic to alleviate the symptoms of IBS, and post hoc data analysis indicated greatest improvements in the female subgroup. The aim of this study is to confirm the impact of this multistrain probiotic on IBS symptom severity in females." GNC sells this consortium as a men's product.
The record: PMID 38287443 · ISRCTN 14866272 — open it (opens in a new tab)
Finding 3 mens-sku-has-fewer-strains-and-half-the-capsules
Four strains against the women's five; 30 capsules against the women's 60.
The record: DSLD 315325 versus DSLD 77203 — open it (opens in a new tab)
Finding 4 mens-rationale-is-two-cochrane-negative-botanicals
One hundred per cent of the men's differentiation is non-probiotic botany. Saw palmetto is null for BPH and lower urinary tract symptoms in NIH-funded, conflict-free Cochrane evidence — peak urine flow mean difference 0.40 mL/s (95% CI −0.30 to 1.09), AUA symptom score 0.25 points (95% CI −0.58 to 1.07), prostate size −1.22 cc (95% CI −3.91 to 1.47), all null, at double and triple doses. Lycopene is "insufficient evidence" across three trials and 154 participants.
The record: PMID 23235581 · PMID 22071840 — open it (opens in a new tab)
Finding 5 urinary-flow-claim-names-the-endpoint-cochrane-nulled
"Every capsule also delivers 303mg of saw palmetto berry extract and 10mg of lycopene to support prostate health and normal, healthy urinary flow." The phrasing stays inside structure/function grammar, but it asserts the exact endpoint the highest-quality evidence measured and found null.
The record: PMID 23235581 — open it (opens in a new tab)
Finding 6 no-per-strain-cfu
All four strains are recorded as "NP" — not provided — inside a single 30 billion figure. You know which four strains; you do not know the split.
The record: DSLD 315325 — open it (opens in a new tab)
What we could not verify
Every gap below is published rather than deleted. Most are derived automatically from the empty fields in this page’s own record, so a gap cannot be hidden by leaving a box blank.
- None claimed status
- No NSF, USP, Informed Choice or ConsumerLab mark appears on the DSLD record or on retail listings. GNC's "Guaranteed potency" is a first-party assertion backed by GNC's own in-house testing programme, which is not third-party certification. There is nothing to verify at an issuer because nothing is claimed — which is honest, and also means a buyer has no external check.
- A US retail price, and therefore the cost per day
- No verifiable US price exists. GNC.com returns a 301 redirect to its discontinued-product path and the product is delisted, so there is no manufacturer price. The only price located anywhere was $76.31 on a marketplace reseller listing that was itself out of stock, for a discontinued SKU; publishing that as "the price" would be worse than publishing nothing. Google's index still carries a stale GNC.com listing at $36.99 with a promotion that expired in February 2026, which is a snapshot rather than a live price. No cost per day is computed.
- Any current US price
- See the price note. GNC.com 301s to a discontinued-product 404.
- The per-strain CFU split across the four Lab4 strains
- DSLD records all four as "NP" — not provided. A 30 billion blend with an undisclosed split is a soft proprietary blend; it could be 29.7 billion of the cheapest strain.
- The Cultech affiliation of two named authors on the 2009 Lab4 trial
- PubMed exposes only the corresponding author's Sheffield affiliation for PMID 18785988. The Cultech connection is confirmed on the 2024 trial (PMID 38287443) and inferred for 2009 by authorship continuity. Published as "manufacturer-connected" rather than as a 2009 affiliation line.
- The EFSA opinion reference behind the titanium dioxide note
- Not fetched. Titanium dioxide is in this product's other ingredients; it was banned as an EU food additive from 2022 and remains permitted in the US. Recorded as a market-divergence note, not a safety assertion.
How to check every line of this page yourself
Nothing on this page requires trusting us. Every claim above resolves to a record you can open:
- Open the NIH Dietary Supplement Label Database record linked at the top of this page. It is the label the manufacturer filed, not our transcription of it.
- Compare the CFU line and the suggested-use line against the disclosure table above. If they disagree with us, we are wrong and we want to know.
- Take any strain designator from the panel and run the query printed beside it. The query is published precisely so you can get a different answer than we did.
- Divide the price by the number of days the label’s own dose instructions make the container last. That arithmetic is the whole of the cost-per-day row.
- Search the certifier’s own register for this product, not for the brand. A company can participate in a programme without this product being on its list.
Two things are true about this product at once, and any honest write-up has to hold both.
The first: it has the best label in its batch. Four organisms, each with a real strain designator — CUL-60, CUL-21, CUL-20, CUL-34 — on an FDA-filed government record, from a consortium (Lab4, Cultech Ltd, Port Talbot) with a genuine findable trial literature and published NCIMB deposit numbers. It states its CFU basis in plain words: “tested to ensure the full 30 billion cultures in each dose are live and active when used by the expiration date.” Most of this category does not clear that bar.
The second: the men’s proposition is two botanicals whose best evidence is negative, wrapped around a probiotic that is not men’s at all. The four Lab4 strains are the identical four in GNC’s women’s SKU, which adds a fifth (L. gasseri CUL-09) and ships twice the capsules. Lab4 is GNC’s universal engine — the same consortium appears across its Stress, Prenatal, Energy, Immune Support, Sport and Weight Management products. Strip the saw palmetto and lycopene and the men’s product is a de-strained women’s product.
And then the detail that makes the “clinically studied” phrasing hard to defend. The confirmatory Lab4 trial enrolled 70 women and zero men — and it says why in its own background section: the manufacturer’s earlier post-hoc analysis found the benefit concentrated in the female subgroup. The best evidence for the consortium in the men’s bottle was generated in a trial that deliberately excluded men.
One practical note for anyone reading a “best probiotic for men” list that still ranks this product: GNC.com no longer sells it. The URL 301s to GNC’s discontinued-product path.