Natural Factors
Natural Factors Critical Care Probiotic 55 Billion Active Cells (30 VCaps)
Maximum strength probiotic for acute digestive health needs
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≈ $1.07 per serving
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Why Choose This Product
Helps support intestinal health.
Could promote a favorable gut flora.
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How It Works
How It Works
Each capsule delivers 55 billion active probiotic cells across nine gastric-resistant strains that survive stomach acid. These beneficial bacteria colonize your intestinal tract, competing with harmful bacteria while supporting digestive function and immune activity. The proprietary strain blend works together to restore bacterial balance more effectively than single-strain formulas.
Who It's For
Adults recovering from antibiotic treatment that disrupted their gut bacteria. People experiencing acute digestive discomfort who need maximum probiotic support. Health-conscious individuals wanting to maintain optimal intestinal flora during stressful periods.
Who It's Not For
This high-potency formula may be too strong for probiotic beginners — start with lower CFU counts first. Contains milk and soy, making it unsuitable for those with severe allergies to these ingredients.
About This Product
With 55 billion active cells in a single vegetarian capsule, Natural Factors Critical Care Probiotic 55 Billion sits in the middle of the Critical Care line. Helps support intestinal health.
What is Critical Care Probiotic 55 Billion?
The capsule holds an even split of two bacterial families: 27.5 billion CFU from a lacto-probiotic blend and 27.5 billion CFU from a bifido-probiotic blend. The lacto side includes strains of Lacticaseibacillus, Lactiplantibacillus and Lactobacillus, and the bifido side is made up of several Bifidobacterium strains. Nine strains are used in all, drawn from human, dairy and plant origins.
Key features
- 55 billion active cells per capsule
- Equal lacto and bifido blends, 27.5 billion CFU each
- Shelf-stable, no refrigeration needed
- 30 vegetarian capsules
- Gluten-free and non-GMO
Why acid-resistant strains?
Bacteria have to pass through the stomach before they reach the intestines. Every strain here was picked because it withstands gastric acid on its own.
Quick Facts
How to Take
Dosage:
1 capsule daily or as directed by a health care practitioner. Take at least 2–3 hours before or after antibiotics.
Cautions:
May contain traces of milk and/or soy. Stop use and consult a health care practitioner if symptoms of digestive upset (e.g., diarrhea) occur, worsen, and/or persist beyond 3 days. Consult a health care practitioner prior to use if you have fever, vomiting, bloody diarrhea, or severe abdominal pain. Do not use this product if you have an immunecompromised condition (e.g., AIDS, lymphoma, patients undergoing long-term corticosteroid treatment). Keep out of the reach of children.
Full Ingredients
Each vegetarian capsule contains: †CFU: colony forming units
| Ingredient | Amount |
|---|---|
| Proprietary synergistic blend: | |
| Total bacterial culture | 55 billion* CFU† |
| ↳ Lacto-probiotic blend | 27.5 billion CFU† |
| ↳ Bifido-probiotic blend | 27.5 billion CFU† |
Allergen Information
Contains no artificial colours, preservatives, or sweeteners; no sugar, wheat, gluten, corn, egg, fish, shellfish, salt, tree nuts, or genetically modified genes or proteins. Suitable for vegetarians.
Quality Assurance
Suitable for: Vegetarian · Gluten-Free · Non-GMO
Customer Reviews
17 reviews