Bacillus subtilis
A spore-forming probiotic that supports digestive and immune health.
Also known as: Hay bacillus • Grass bacillus
Overview
Bacillus subtilis is a species of bacteria that is found in soil and the gastrointestinal tract of humans. It is a spore-forming bacterium, which means it can survive in harsh conditions, such as the acidic environment of the stomach. As a probiotic, Bacillus subtilis has been shown to support digestive health, immune function, and a healthy inflammatory response.
Key Benefits
Supports Digestive Health
Bacillus subtilis can help promote a healthy balance of bacteria in the gut, which can improve digestion and reduce occasional gas and bloating.
Enhances Immune Function
Studies suggest that Bacillus subtilis can stimulate the immune system and help protect against infections.
Strengthens Gut Barrier Function
Bacillus subtilis may help to strengthen the lining of the gut, which can prevent harmful substances from entering the bloodstream.
Dosage & How to Take
A typical daily dose of Bacillus subtilis is 1-5 billion colony-forming units (CFUs).
| Purpose | Dose | Notes |
|---|---|---|
| Digestive Health | 1-5 billion CFUs/day | Look for a high-quality, spore-based probiotic supplement. |
| Immune Support | 1-5 billion CFUs/day | Consistency is key for seeing results. |
Best Time to Take
Can be taken at any time of day, with or without food.
With or Without Food
Can be taken with or without food.
Forms & Bioavailability
| Form | Absorption | Best For | Notes |
|---|---|---|---|
| Spore-Based Probiotic Capsules | High | General use | The spore form allows the bacteria to survive stomach acid and reach the intestines intact. |
Side Effects & Safety
Common
- Mild digestive upset (e.g., gas, bloating) when first starting
Rare
- None reported
Contraindications
- Individuals with a compromised immune system should consult a healthcare provider before taking probiotics.
Interactions
Antibiotics can kill both good and bad bacteria. It is best to take probiotics at least 2 hours apart from antibiotics.
Scientific Research
The effect of Bacillus subtilis on the composition and function of the human gut microbiota
Bacillus subtilis supplementation was associated with an increase in beneficial gut bacteria and a decrease in inflammatory markers.
The effects of Bacillus subtilis on the immune system of healthy adults
Bacillus subtilis supplementation was shown to enhance the immune response to a viral challenge.
Food Sources
Products With Bacillus subtilis
1 product in our database contains this ingredient
Frequently Asked Questions
Medical Disclaimer
This content is for educational and informational purposes only and is not intended as medical advice. Always consult with a qualified healthcare professional before starting any supplement regimen, especially if you have pre-existing health conditions or are taking medications. The statements on this page have not been evaluated by the Food and Drug Administration.