Live microorganisms whose effects depend on the specific strain — results for one strain don’t carry over to another.
Doses are listed in colony-forming units (CFU). Many products contain 1–10 billion CFU per dose, but higher counts don’t necessarily mean better results. Look for strains listed by name and a count guaranteed through the expiration date.
People who are critically ill or immunocompromised should talk to a doctor first.
Educational information, not medical advice. Talk to a healthcare professional before starting a supplement, especially if you are pregnant, nursing or take medication.
| Product | Probiotics per serving | Form | Score |
|---|---|---|---|
 NSF Contents CertifiedCertified Gluten-Free | 250 million CFU (2.5 mg)Bacillus coagulans SNZ 1969 | Powder | 8.2 |
 NSF Certified for Sport | 2 billion CFUBacillus subtilis DE111 (probiotic) | Powder | 8.1 |
 NSF Certified for SportUSDA OrganicNon-GMO Project VerifiedCertified Gluten-Free | 2 billion CFUBacillus subtilis DE111 (probiotic) | Powder | 8.1 |
 cGMP facility | 40 mg (10 billion CFUs)Lactobacillus rhamnosus GG | Capsule | 8.0 |
 Third-party tested | 224 mg / 38.7 billion AFUDigestive Health Probiotic Blend (16 strains)36 mg / 7.32 billion AFUMicronutrient Synthesis Probiotic Blend (2 strains)36 mg / 3.34 billion AFUDermatological Health Probiotic Blend (4 strains)13 mg / 4.21 billion AFUCardiovascular Health Probiotic Blend (2 strains) | Capsule | 7.4 |
 NSF Certified for Sport | 37 mg (10 billion viable cells)Dairy-free probiotic blend (L. rhamnosus GG, L. acidophilus NCFM, B. lactis HN019, L. casei LC-11, L. plantarum LP-115) | Powder | 7.3 |
 Non-GMO Project VerifiedThird-party testedcGMP facility | 220 mg / 60 billion CFUProbiotic Blend (10 species) | Capsule | 7.2 |
 Third-party testedcGMP facility | 6 g fiberFiber & Probiotics Blend (flax, acacia gum, chia, soluble corn fiber, chicory root, L. rhamnosus Lrha51, L. acidophilus UALa-01) | Powder | 7.2 |
 cGMP facility | 2 billion CFUBacillus coagulans SNZ-1969 or IDCC1201 | Powder | 7.0 |
 Third-party testedNon-GMO Project VerifiedClean Label Project | 40 mg (11 billion CFU at expiration)Probiotic Blend: Lactobacillus rhamnosus (LGG®) and Bifidobacterium animalis ssp. lactis (BB-12®) | Capsule | 7.0 |
 NSF Certified for Sport | Not disclosedBacillus subtilis DE111 | Capsule | 6.9 |
 USDA OrganicCertified Gluten-FreeCertified Vegan | 30 mg (250 million CFU at expiration)Raw Probiotic & Enzyme Blend with Bacillus subtilis DE111 | Powder | 6.8 |
 KoshercGMP facility | 10 mg (1 billion CFU)Bacillus subtilis DE111 | Powder | 6.8 |
 | 1 billion CFU at manufacture; 10 million CFU guaranteed through the best-by dateBifidobacterium longum subsp. longum 35624™ (formerly B. infantis 35624) | Capsule | 6.6 |
 Third-party testedcGMP facility | 648 mgPre and Probiotic Blend (blue agave inulin, B. bifidum, L. rhamnosus, L. acidophilus) | Powder | 6.1 |
 Third-party testedcGMP facility | 500 mg (5 billion CFU)Probiotic Blend (L. acidophilus LA85, L. casei LC89, B. bifidum BBi32, B. lactis Bla80) | Powder | 5.9 |
 | 500 million AFU (total)Probiotic Blend: Clostridium butyricum WB-STR-0006, Akkermansia muciniphila WB-STR-0001, Bifidobacterium infantis | Capsule | 4.9 |
Amounts are per serving as printed on each label. “Not disclosed” usually means the ingredient sits inside a proprietary blend.
Probiotic benefits depend on the exact strain and dose. How to read strain names and CFU claims, where the evidence is solid or mixed, and who should skip them.
Nutrition Reviews Editorial Team · Sep 28, 2026