Your gut and your brain never stop talking.
Roughly 95% of your body's serotonin is made in your gut — and the signal runs both ways. When digestion drifts, mood, focus and sleep often follow. GoodOnes reads that conversation, matches you to your gut-brain phenotype, and builds one targeted probiotic for it.
90 seconds. No cost. No account. Your result comes with a formula matched to it.
Brain → gutGut → brain
The gut-brain axis, in plain terms
Your gut isn't just for digestion. It's a chemical factory wired directly to your brain — and the microbes living there help run the line.
Where your calm is made
Gut microbes help produce and regulate the same messengers your brain runs on — serotonin, GABA, dopamine. The mix of species you carry tilts that chemistry one way or another.
A two-way line
The vagus nerve carries signals gut-to-brain and brain-to-gut all day. That's why stress can upset your stomach — and why an off-balance gut can quietly weigh on mood and sleep.
Everyone leans differently
Two people with "bad digestion" can have opposite underlying patterns. Naming your lean is the difference between guessing at a probiotic and choosing the right one.
GoodOnes is the everyday side of a serious science company.
We're built on Flore — the precision-microbiome platform (formerly Sun Genomics) that has sequenced tens of thousands of guts in its own CLIA/CAP-certified lab and built a personalized formula for each one. Flore does the deep clinical work; GoodOnes makes that intelligence simple, affordable and yours — a single targeted probiotic matched to how your gut-brain axis actually behaves.
People first, always. You don't need to read a research paper to feel better — you need the right one for you.
Four steps from question to relief
Start with a 90-second read of your symptoms. Go as deep as you want from there — confirm with a lab test, or begin your formula today.
Take the assessment
A short, science-backed quiz reads how your digestion, mood and history line up — and names your gut-brain phenotype.
Get matched
We map your phenotype to the single strain most likely to help. Want certainty first? Confirm it with an at-home microbiome test.
Start your One
A targeted, single-job probiotic ships to your door — built on Flore's formulation science, not a generic multi-strain blend.
Adjust with support
Track how you feel, add a second One if a second concern shows up, and fine-tune over time. Real humans are a message away.
Six gut-brain phenotypes. One is yours.
These aren't diagnoses — they're patterns in how your gut-brain chemistry leans. The assessment tells you which one fits, and which One to start with.
Find your gut-brain phenotype.
Answer a handful of questions about your gut and your head. In 90 seconds you'll have your phenotype, the One matched to it, and a first-order discount waiting.
Take the free assessment →Free · No account needed · Results by email