Probiotic

Spore-Based Probiotics

Also known as: Bacillus clausii, Bacillus coagulans, Bacillus subtilis, MegaSporeBiotic

Evidence

Bacillus spore probiotics that survive stomach acid and shelf storage. Don't require refrigeration.

Last reviewed June 2026 · Evidence graded from peer-reviewed research, not editorial opinion. Educational only — not medical advice.

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Primary uses

Shelf-stable probiotic
Gut health
Immune support

How it works

Spore form survives stomach acid
Germinates in intestines
Modulates gut microbiome

Dosage

Typical range: 1-4 billion CFU daily
Timing: With meals may be better
With food: Preferably
Duration: Safe long-term
Special populations: Those wanting shelf-stable option

Forms

Capsules

Safety

Common side effects

Die-off symptoms initially

Contraindications

None

Products containing Spore-Based Probiotics

Top-scoring supplements in our catalog that list Spore-Based Probiotics on the label. Each product is graded on Formulate's ingredient-level rubric — dose accuracy, form, transparency, and third-party testing.

Evidence notes

Excellent survivability

Grade B: Some human trials support key claims; further confirmation needed.

Related in Probiotic

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Medical disclaimer. This page is educational and does not replace advice from a qualified healthcare provider. Individual needs and risks vary — consult a professional before starting, stopping, or combining supplements, especially if you are pregnant or nursing, taking medication, or managing a health condition.