PROBIOTICS
Bacillus subtilis (100 billion CFU/g)
Bacillus subtilis is a spore-forming probiotic that supports digestive health and immune function.
Also known as: B. subtilis, spore probiotic, probiotic
At a glance
- Form
- Bacillus subtilis · 100 billion CFU/g
- Category
- Probiotics
- In an apiece formula
- 20 mg a day (you can change it)
- Recommended intake
- No recommended intake (not an essential nutrient)
- Upper limit
- No established UL
- Studied for
- Gut & digestion, Immune support*
- Reference
- NIH ODS: Probiotics fact sheet
Who should be careful
Our safety rules leave bacillus subtilis out of a formula, or keep the amount lower, with:
Medicines and supplements
- Multiple sclerosis medicine
- Chemotherapy or targeted cancer pills
- Radiation therapy
- Cancer immunotherapy
- Anti-rejection medicine
- Mycophenolate, azathioprine or leflunomide
- Methotrexate
- Biologic or JAK inhibitor
- Steroid pills or shots
Procedures
- Surgery
- Dental surgery
- Cosmetic surgery or injections
- Biopsy, epidural, nerve block or joint injection
- Egg retrieval, embryo transfer or egg freezing
- Organ or stem-cell transplant
Health conditions
- Active cancer
- Cancer in the past
- Breast cancer or another estrogen-sensitive cancer
- Prostate cancer
- HIV
- Histamine intolerance or mast cell activation syndrome
Life stage
- Pregnancy
- Breastfeeding
- Trying to conceive
Always check with your doctor or pharmacist before adding a supplement if you take medication, are pregnant or nursing, or have a health condition. Stay under the upper limit from all sources combined, including multivitamins.
Questions
How much bacillus subtilis a day?
apiece formulas usually include 20 mg a day. The recommended intake for adults is No recommended intake (not an essential nutrient). Upper limit: No established UL.
What is bacillus subtilis used for?
Bacillus subtilis is a spore-forming probiotic that supports digestive health and immune function. In apiece it is part of formulas for Gut & digestion, Immune support.*
Who should be careful with bacillus subtilis?
apiece’s safety rules leave it out or limit it with: Multiple sclerosis medicine; Chemotherapy or targeted cancer pills; Radiation therapy; Cancer immunotherapy; Anti-rejection medicine; Mycophenolate, azathioprine or leflunomide; Methotrexate; Biologic or JAK inhibitor; Steroid pills or shots; Surgery and others. Check with your doctor or pharmacist if any apply to you.
Can I get bacillus subtilis in a personalized supplement?
Yes. apiece builds one daily blend around your goals and, if you have them, your lab results. Bacillus subtilis can be part of it at the amount listed, with every ingredient shown and never more than 10 capsules a day.
*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. This page is general information, not medical advice. Check with your doctor or pharmacist before starting a supplement, especially if you take medication, are pregnant or nursing, or have a health condition. Updated 2026-10-21.