Dr. Christian González (AKA Dr. G) recently released his 2025 Probiotic Investigation, and the results are... honestly shocking.
His team reached out to 56 probiotic brands - from niche companies to some of the biggest household names you see on store shelves - asking for one simple thing:
Proof that what's on the label is actually in the bottle.
They requested receipts on:
- Third-party Certificates of Analysis
- DNA strain verification
- CFU potency at expiration (not just at manufacturing)
- Stomach acid survivability data
- Manufacturing standards and facility certifications
Here's what happened:
- 45 brands didn't even respond (including some names you'd definitely recognize)
- 8 brands responded but refused to provide documentation
- Only 3 brands provided complete transparency
Ora was one of those 3 and passed with flying colors.
The brands that didn't make the cut? You know them.
We're talking household names like Garden of Life, Thorne, Ritual, Seed, and dozens more. Big marketing budgets. Celebrity endorsements. Prime shelf space at Whole Foods.
But when asked to prove their quality standards? Crickets.
To be fair, this doesn't necessarily mean their products are bad - it just means they couldn't (or wouldn't) verify their claims. In our book, that's a red flag.
Here's exactly what we sent Dr. G's team, because the proof is in the (probiotic) pudding:
- Full third-party COAs from ISO/IEC 17025 accredited labs (Food Safety Net Services, Qalitex, Venture Labs, Certified Laboratories)
- Exact strain designations - not just species names, but the actual strain codes (think: Lactobacillus acidophilus LA-14 and Bifidobacterium lactis HN019®)
- CFU counts guaranteed at expiration, not just at manufacturing (because what good is 100 billion CFU if most of them are dead by the time you open the bottle?)
- Stability and viability testing - we simulate heat, storage, and transport conditions to make sure the probiotics survive your mailbox, your pantry, and your stomach
- Manufacturing certifications - cGMP, FDA-registered, NSF-certified facilities
- Batch testing for contaminants - every batch tested for heavy metals, pesticides, glyphosate, mycotoxins, pathogens, E. coli, Salmonella, yeast, mold, the works
- The 5 Nation (5N) Standard - we don't just test for these contaminants, we benchmark the results against the toughest testing requirements from Germany, Japan, New Zealand, the US, and Switzerland
We developed the 5N Standard to formalize and build on the quality and transparency requirements we’ve held ourselves to for years. Our drive for transparency was born out of frustration with vague claims and missing data in the supplement space. That’s why we’ve continuously published our COAs and testing results publicly.
The probiotic industry is the Wild West.
Companies can slap "50 billion CFU" on a bottle with zero obligation to prove it. They can claim "clinically studied strains" without disclosing which strains or which studies. You hear “science-backed,” but can’t find the science to back it. They can skip third-party testing entirely and still call their product "premium."
And most do.
Transparency isn't a marketing strategy for us - it's the bare minimum.
If a brand can't show you third-party proof that their product works as advertised, that's not confidence. That's suspicious.
We're nerds about this stuff (clearly). We test obsessively, publish our results, and answer every question we get about our formulas - because if we're going to ask you to trust your gut health to us, you should be able to verify that trust.
It’s easier to Trust Your Gut when there’s complete transparency
Shop our Trust Your Gut prebiotic + probiotic line - every product backed by the rigorous testing standards that got us into Dr. G's top 3.
