ongoing support
Candida & Yeast Balance
Gut & Digestive Health
Probiotics & Prebiotics
A spore-forming probiotic from Researched Nutritionals combining three researched Bacillus strains in a shelf-stable capsule, supporting a healthy intestinal microbiome and digestive function.
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Quick Facts
Key Ingredients
CB Complex 96 mg / 11 Billion CFU
Third-party Testing
Dietary
Gluten-free
Non-GMO
Vegan
Written by
Dr. Marty Ross, MD
Updated
October 7, 2026
Dr. Ross's Expert Review
CoreBiotic is a spore-forming probiotic I use for daily intestinal microbiome support. Researched Nutritionals combines three Bacillus strains, Bacillus coagulans SNZ1969, Lactospore MTCC 5856, and Bacillus subtilis DE111, in a single capsule. The spore shell survives stomach acid, which kills many standard probiotic strains before they reach the intestines, and spore probiotics do not require refrigeration.
Once in the gut, the bacteria leave the spore form and get to work through competitive exclusion, crowding out organisms you do not want. Each strain here is fully sequenced and registered, so you get the same organisms every bottle.
In my practice, I use it for people who want ongoing digestive support, including people whose intestinal microbiome has been through a lot, such as long regimens that put stress on the gut. It supports healthy digestion, gut-associated immune function, and the intestinal barrier. A healthy diet is also critical.
Each strain has human trial data behind it, including trials on abdominal comfort, gas and bloating, motility, and germination in the small intestine. Probiotic research is strain-specific, so I pay attention to which strain a study tested. The strains in this product are the ones with the trial records.
I suggest two capsules once a day, at least 30 minutes before eating. If you are new to probiotics, one capsule a day for the first week makes the adjustment easier. One caution: the medium chain triglycerides come from coconut, so anyone with a tree nut allergy should review the label with their physician. Pregnancy and nursing call for a physician’s review too.
For daily microbiome support in a shelf-stable capsule, this is one of the workhorse probiotics I use.
These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. Dr. Ross has a financial relationship with the Femologist store, where this product is sold.
How I Use It in My Practice
I use CoreBiotic for ongoing daily microbiome support in my practice. The dose I use is 2 capsules once a day, at least 30 minutes before food, which is the manufacturer direction and what I see work in practice. During herbal or prescription regimens I commonly keep a spore probiotic running to support digestion. Some people are sensitive when first starting a probiotic, so I begin those patients on one capsule a day and increase as tolerated. Anyone with a tree nut allergy reviews the coconut-derived ingredients with their physician first, and pregnancy or nursing calls for the same conversation before starting.
This reflects Dr. Ross's clinical experience and is educational, not medical advice. Work with your treating physician before starting, stopping, or changing any supplement or medication.
The Research, in Dr. Ross's Words
There is individual research on each of the three strains in this formula. For Bacillus coagulans MTCC 5856, sold as LactoSpore, a double-blind pilot found improved digestive symptoms in adults with IBS-predominant diarrhea, and a later placebo-controlled trial found less functional gas and bloating. A controlled trial of the SNZ 1969 strain improved intestinal motility and constipation perception in healthy adults with mild intermittent constipation. Older work on the coagulans family found improvements in abdominal pain and bloating in adults with IBS.
For Bacillus subtilis DE111, the research is mostly about survivability. A crossover study showed the spores survive stomach transit and germinate in the small intestine within hours, and a small four-week pilot found an increase in anti-inflammatory immune cell populations, while gastrointestinal and inflammation markers were largely unchanged.
Where the research is limited: these trials studied individual strains, not the three-strain combination in this product, several are small pilots, and a number were funded by ingredient suppliers. The strain-level evidence is genuine, the combination is a reasonable assembly of researched strains, and the endpoints are digestive comfort rather than treatment of any condition. I use it as microbiome support on that basis, no more and no less.
References
From:
Researched Nutritionals
CoreBiotic® combines three fully sequenced and registered spore-based probiotics along with VitaFiber® prebiotic to support a healthy microbiome. Each strain was specifically chosen for its mechanisms of action, backed by supporting research.
Directions of Use
Take 2 capsules once daily or use as directed by your healthcare professional.
Does not contain
crustacean-shellfish
eggs
fish
gluten
milk
peanuts
soy
wheat
If pregnant or nursing, consult your health care professional before use.
Excerpted from Researched Nutritionals's product information. These statements have not been evaluated by the Food and Drug Administration.
Supplement Facts
Serving Size: 2 Capsules
Servings Per Container: 30
| Amount Per Serving | Amount | |
|---|---|---|
CB Complex Bacillus coagulans (SNZ1969), Lactospore (Bacillus coagulans MTCC 5856), Bacillus subtilis (DE111) | 96 mg / 11 Billion CFU | |
Common Questions about CoreBiotic
Answers are general educational information, not medical advice for your situation.
CoreBiotic
By Researched Nutritionals
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