Probiotic
Lactobacillus acidophilus
Also known as: Acidophilus, Bacillus acidophilus, L. acidophilus, Lactobacillus acidophilus
A
Evidence
Foundational probiotic strain for vaginal and gut health. One of the most studied probiotic species.
Primary uses
- Gut health
- Vaginal health
- Immune support
- Lactose digestion
How it works
- Produces lactic acid
- Inhibits pathogens
- Supports gut barrier
Dosage
- Typical range
- 1-10 billion CFU daily
- Timing
- Any time
- With food
- Can take either way
- Duration
- Safe long-term
- Special populations
- Women's health, antibiotic recovery
Forms
- Capsules
- Powder
- Foods
Safety
Common side effects
- Gas initially
Contraindications
- Severe immunocompromise
Evidence notes
Well-studied probiotic strain
Grade A: Multiple well-designed human trials support the main claims.
Related in Probiotic
Check a full stack
Formulate's free interaction checker lets you paste in any combination of supplements and medications at once — every pairing flags severity, timing, and cited evidence.
Open the checkerMedical disclaimer. This page is educational and does not replace advice from a qualified healthcare provider.