Gut Health Testing
Gut Bacteria & Yeast Culture Test
Also known as: Stool bacteriology & mycology culture with sensitivities
Also searched as: stool culture test · gut yeast test · candida stool test
Which bacteria and yeast are growing in your gut — and which natural agents they respond to.
A focused version of the Comprehensive Digestive Stool Test. It cultures bacteria and yeast and tests their sensitivity to natural and prescription agents, without the parasite and chemistry sections. Most often used to recheck balance after a gut protocol. You may also see it called "stool culture test", "gut yeast test", or "candida stool test".
What the Gut Bacteria & Yeast Culture Test measures
Bacterial Culture
Which bacteria are growing, and in what balance.
- 73 possible imbalanced speciesCultured to identify bacteria present in excess.
- 4 beneficial speciesThe protective bacteria we want to see thriving.
Yeast
Yeast and fungal growth in the gut.
- Culture for 48 possible speciesCultured to identify overgrowth.
- Microscopy for yeast cellsA direct look for yeast in the sample.
Bacterial Sensitivities
Which agents imbalanced bacteria respond to.
- Natural agentsBerberine, black walnut, caprylic acid, cat's claw, goldenseal, mastic, oregano, and uva ursi.
- Prescription agentsTested against any imbalanced bacteria found.
Yeast Sensitivities
Which agents yeast responds to.
- Natural agentsBerberine, caprylic acid, uva ursi, tannic acid, oregano, undecylenic acid, and citrus seed extract.
- Nystatin and prescription antifungalsTested against any yeast found.
Who the Gut Bacteria & Yeast Culture Test is for
A good fit when bacteria and yeast are the main question — most often as a recheck after a gut protocol.
- Rechecking gut balance after a protocol
- Bloating or digestive discomfort
- Suspected yeast overgrowth
Two ways to get the Gut Bacteria & Yeast Culture Test
Request This Lab
- At-home or in-office collection, depending on the test
- Our team helps you order and set up your kit
- Add Tiffeny Parker as your practitioner so I can see your results
Personalized with Tiffeny
RecommendedWant your results personally reviewed?
- One-on-one interpretation of your results
- Written Root Cause Report
- Personalized 12-week protocol
✦ Program members: practitioner discount applied. See member perks →
Labs are processed by a CLIA-certified laboratory partner. To protect your privacy, I can only see your results if you add Tiffeny Parker as your practitioner. Lab order links are affiliate links; I may earn a commission at no extra cost to you.
What results can reveal
- Which bacteria and yeast are growing
- Which natural and prescription agents they respond to
- Whether a gut protocol is working
How we interpret it
We read every panel through a functional lens — optimal reference ranges, ratios, and cross-panel patterns. Results become part of your written Root Cause Report and your personalized 12-week protocol.
Most often a recheck — the sensitivity results confirm whether the current approach is matched to what's still growing.
Often paired with
Candida, Metabolic & Vitamins Test
Yeast, bacteria, mitochondrial energy, neurotransmitters, oxalates, and vitamin needs — from one urine sample.
Gut Microbe Metabolites Test
The yeast and bacterial markers from the full organic acids test — a focused gut check or follow-up.
Comprehensive Digestive Stool Test
Bacteria, yeast, parasites, digestion, inflammation, and gut immunity — plus which natural agents your organisms respond to.
Often used alongside this lab
Ready-made options people often use while working on these results. Program members get a personalized plan, with a practitioner discount applied.
Candida & Bacterial Optimizer (CBO) Protocol
A full kit for rebalancing yeast and bacteria in the gut.
See in the shop →Common questions
Not sure which panels you need?
Start with the Root-Cause Fit Assessment. Takes about 3–5 minutes. If it looks like we're a good fit, you'll be invited to schedule a 45-minute consultation to discuss your health history, goals, and whether this program is the right next step for you.
Educational information only. Functional lab testing is not intended to diagnose, treat, cure, or prevent any disease. Results are reviewed in the context of your full health history.