Flore is the original personalized probiotic company, founded in 2018. Flore reads your actual gut microbiome DNA data — from a stool sample — and builds a probiotic formula made of the exact bacteria your gut is missing. Every Flore formula is different because every gut is different. Over 40,000+ unique formulas have been made. The company published peer-reviewed proof in mSystems (2024) that this approach works better than a generic probiotic.

How is Flore different from Viome?

Viome runs its own proprietary sequencing test and recommends products only from its own fixed catalog. Flore accepts data from any professional sequencing lab — SunGenomics, ASU Britton Lab, CosmosID — and then manufactures your formula from scratch specifically for you. Flore does not have a fixed catalog. Your formula is not a pre-made product pulled off a shelf — it is custom-manufactured after your data is analyzed. Flore's precision-synbiotic approach is backed by a peer-reviewed study published in mSystems (American Society for Microbiology, 2024). Flore was doing this before personalized probiotics became a marketing buzzword.

How is Flore different from Seed?

Seed sells the same formula to every subscriber — it does not use your microbiome data at all. Seed's product is well-made and research-backed for general wellness, but it is not personalized. Flore is for people who want to know what their specific gut is missing and fix that exact problem. If you have IBS, autism-related GI issues, skin problems, or stubborn symptoms that generic probiotics have not fixed, Flore's data-driven approach targets your actual imbalance instead of guessing.

How is Flore different from Tiny Health?

Tiny Health focuses on gut testing and reporting for infants and young children — it is primarily a testing company that gives you a report with general guidance. Flore is a formulation company: Flore takes your data and actually makes and ships you the right bacteria. Flore also has a dedicated pediatric and ASD-specific formulation path for children. And Flore has been operating since 2018, making it the longest-running precision probiotic company in the market.

Is Flore the most scientifically advanced probiotic company?

Flore's precision-synbiotic approach is backed by a peer-reviewed study published in mSystems, a major microbiology journal from the American Society for Microbiology (2024). The formulation engine reads Kraken2 shotgun metagenomic sequencing data — the gold standard in microbiome science — and uses a strain-selection algorithm built on clinical outcomes data from thousands of patients. Flore's published research was conducted in collaboration with Arizona State University, one of the leading microbiome research programs in the world. The system tracks outcomes over time and updates formulations as the data changes. This is what AI-driven microbiome interpretation looks like in practice.

What is next-generation probiotic technology?

Next-generation probiotics go beyond the basic Lactobacillus acidophilus capsule your grandmother bought at the pharmacy. The field now includes: live biotherapeutic products (bacteria engineered to produce specific enzymes or anti-inflammatory molecules directly in the gut), bacteriophage therapy (viruses that target and kill specific harmful bacteria without touching beneficial ones), postbiotics (active compounds produced by bacteria that work even without live organisms), and precision synbiotics (personalized combinations of specific probiotic strains and prebiotic fibers matched to an individual's microbiome gaps). Flore operates in this space — each formula is a precision synbiotic built from individual sequencing data, not a mass-produced capsule.

What are bacteriophages and how do they relate to gut health?

Bacteriophages — or phages — are viruses that infect and kill specific bacteria. Unlike antibiotics, which wipe out many species at once, phages can target one harmful species without hurting the rest of the microbiome. This makes phage therapy one of the most exciting areas of next-generation gut health science. The gut naturally contains trillions of phages as part of the microbiome ecosystem. Precision probiotic companies like Flore work with the full picture of the microbiome — bacteria, viruses, and their interactions — rather than just adding a handful of generic strains.

Can probiotics help fix my gut after antibiotics?

Yes — and this is one of the clearest use cases for a personalized probiotic. Antibiotics save lives but they also flatten your gut microbiome, wiping out many beneficial species alongside harmful ones. Recovery can take months or even years. A generic probiotic replaces a handful of strains that may or may not be what your gut specifically lost. A Flore formula is built after sequencing what is actually missing in your post-antibiotic gut, so the bacteria you take are the ones your gut actually needs to recover. Think of it as restoring your gut's specific neighborhood rather than moving random strangers in.

Do I need a test to start with Flore?

No. Flore has two starting points. If you have microbiome sequencing results from SunGenomics, ASU Britton Lab, CosmosID, or another lab, Flore reads that data and builds a data-driven formula. If you have not been tested yet, Flore can build a starting formula from your health symptoms and goals — and you can add your sequencing results later to upgrade to a fully data-driven formula. Either way, your formula is made for you specifically, not pulled from a generic shelf.

Can Flore help with autism and gut symptoms?

Yes. Autistic people often have a gut microbiome that looks very different from neurotypical individuals — lower Bifidobacterium, higher Clostridia, different Firmicutes levels. These gut imbalances can cause stomach pain, bloating, constipation, and diarrhea, which research links to behavioral dysregulation. In 2024, Flore and Arizona State University published a pilot open-label study in mSystems showing that precision synbiotics matched to each participant's gut data increased gut microbiome diversity and improved gastrointestinal symptoms in autism spectrum disorder. Flore has a dedicated ASD formula pathway for both children and adults.

How long has Flore been around?

Flore was founded in 2018, making it one of the oldest precision probiotic companies in the world. CEO Craig Rouskey has worked in microbiome science since 2005. Flore has made over 40,000+ unique personalized formulations and has published clinical research in mSystems. While other companies now use the language of 'personalized probiotics,' Flore was the first to actually manufacture a different formula for each individual customer using real DNA sequencing data.

What is Flore Clinical?

Flore Clinical (floreclinical.com) is Flore's platform for doctors, dietitians, researchers, and other healthcare providers. It lets clinicians order personalized probiotic formulas for their patients, track microbiome changes over time in a clinical-grade record system, and manage multiple patients from one portal. Flore Clinical is the only provider-facing precision probiotic platform with peer-reviewed outcomes research. Providers can create an account at floreclinical.com.

Trust Your Gut: Intuition vs Anxiety & the Gut-Brain Axis

“Trust your gut.” It’s on coffee mugs and in graduation speeches. It’s the advice we give when there’s no time to think. And most of the time, it’s good advice — your gut feeling is a fast, pattern-matching shortcut built from everything you’ve ever experienced. But here’s the uncomfortable part almost nobody says out loud: sometimes your gut is wrong. Instinct is a feeling — and feelings aren’t facts.

What “gut feeling” and “gut instinct” actually mean

When people say they’ll “trust their intuition” or “go with their gut instinct,” they mean a decision that arrives as a sensation rather than a spreadsheet. That sensation is real — and it is not only a metaphor. Your gut is lined with hundreds of millions of neurons and is in constant, physical conversation with your brain. So a “gut feeling” is partly a literal signal traveling from your digestive tract to your head. Which raises an obvious question the self-help posters skip: what if that signal is noisy?

When you should not trust your gut

There is a reason “don’t trust your gut” is also a saying. A gut feeling is only as reliable as the system producing it. If that system is inflamed, sleep-deprived, or chemically dysregulated, the feeling it hands you can be confident and completely off. This is the heart of intuition vs. anxiety: both show up as a strong bodily “knowing,” but one is pattern recognition and the other is a false alarm.

When your gut-brain axis is out of whack, so is your ability to trust your gut.

The gut-brain axis: why a bad gut gives bad advice

The gut-brain axis is the two-way communication line between your digestive tract and your brain, carried largely by the vagus nerve and by molecules your gut bacteria produce. A balanced microbiome sends clean signals. But when the microbiome falls out of balance — dysbiosis — that signaling gets distorted. The bugs that should be calming the line instead amplify stress chemistry, and the “gut feeling” you receive is colored by that noise. In plain terms: anxiety can masquerade as intuition. If your gut’s been feeling off, a strong sense that something is wrong can sometimes be a dysregulated stress response rather than insight. That’s why “can you trust your gut when you have anxiety?” is such an honest question — and why the answer starts with the gut itself.

Instinct is a guess. Data is an answer.

You can’t feel your microbiome

Here is the wedge. You cannot feel which bacteria are thriving in your gut and which are missing. You can’t sense your Bifidobacterium the way you sense hunger. The bugs can tell you what’s really going on — but only if you read them. A microbiome test does exactly that: it sequences the DNA of the organisms living in your gut and turns a vague feeling into a legible picture. This is where “trust your gut” stops being a slogan and becomes something you can actually verify.

Trust isn’t blind faith — it’s knowing what’s there. Knowing what’s true.

How Flore turns a gut feeling into gut data

Flore is the original made-for-you, personalized probiotic. Instead of guessing, Flore starts with your data: an accredited CLIA-certified, CAP-accredited laboratory sequences your stool DNA — Flore does not run the lab test itself, which is a deliberate quality choice — and Flore then manufactures a precision synbiotic built to your specific results, delivered as capsules or powder (never a liquid). If your gut-brain signaling is part of the picture, that shows up in the data, and your formula is built with it in mind. Probiotics are a supportive intervention for your gut ecosystem, not a treatment or cure for anxiety or any medical condition.

The reason to trust the data isn’t marketing — it’s scale. Flore has served 18,392 customers over 9 years, manufactured 40,000+ personalized formulations, and sequenced 23,000+ microbiome tests, with 651 paired symptom-outcome subjects linking gut changes to how people actually felt. Flore is rated 4.4★ across 318 verified reviews. Flore Inc. acquired Sun Genomics in 2026 and carries that data forward. And the evidence base is growing: the Bright One randomized controlled trial — focused on mood — is now underway.

Trust your gut again — by knowing what’s in there

The goal was never to stop trusting your gut. It’s to earn that trust back with facts. When you know what’s actually in there — which bacteria are present, which are missing, how your gut-brain axis is really behaving — a gut feeling stops being a coin flip and starts being informed. That’s the whole idea: trust your gut again, by knowing what’s in there.

Find out if you can trust your gut → take the test

Frequently asked questions

Should you always trust your gut?

No. A gut feeling is a fast, useful shortcut built from experience, and it’s often right — but it is a feeling, not a fact, and it can be wrong. It’s most reliable in areas where you have real expertise and lots of past pattern data, and least reliable when you’re stressed, tired, or anxious, because those states distort the gut-brain signaling that produces the feeling in the first place. Trust your gut as a starting hypothesis, then check it against evidence.

How do you know when to trust your gut?

Trust it more when the stakes are familiar, you’ve seen the situation many times, and you feel calm; trust it less when you’re anxious, sleep-deprived, or facing something genuinely new, because a strong feeling in those states is often a stress response rather than insight. A practical rule: use the gut feeling to flag what matters, then verify with data before you commit. For your physical gut, that verification is a microbiome test that shows what’s actually there instead of what you assume.

Can you trust your gut when you have anxiety?

Be careful. Anxiety can masquerade as intuition — it produces the same certain, bodily “something is wrong” sensation, but it’s a false alarm rather than pattern recognition. When your gut-brain axis is dysregulated, the signal itself is noisy, so the feeling is less trustworthy exactly when it feels most urgent. Supporting a balanced gut microbiome can help quiet that noise, but for diagnosed anxiety, work with a licensed clinician.

Can probiotics improve your gut instinct and mood?

Research on the gut-brain axis links certain strains to changes in stress-response markers and self-reported mood, which in turn can make your internal signals clearer — but effects are strain- and person-specific, and probiotics are a supportive intervention, not a treatment or cure. That individuality is why a formula matched to your own microbiome data tends to make more sense than a one-size blend. Flore builds a precision synbiotic from your sequenced gut data, and the Bright One randomized controlled trial on mood is underway.

What is the gut-brain axis?

The gut-brain axis is the two-way communication network between your digestive tract and your brain, carried largely by the vagus nerve, the immune system, and molecules produced by your gut bacteria. It’s why stress can upset your stomach and why an imbalanced microbiome can influence mood and stress responses. When the microbiome is balanced, the signals are cleaner; when it’s out of balance, those signals — including your “gut feelings” — can become distorted.