All formulas
PB8 probiotics: all six formulas
Pick a need, or read the seal: the number on it is billions of CFU per serving.
Classic · 1 capsule a day
PB8 Immune Support Probiotic
15 billion CFU and 10+ strains in one capsule
Regular price$25.49 $0.42 a day
60 capsules
3-in-1 · delayed release
PB8 Synbiotic 3-1 Probiotic
65 billion CFU, 31 strains, prebiotic fiber
Regular price$39.99 $1.33 a day
30 capsules
3-in-1 · for women
PB8 Women's Probiotic
50 billion CFU, 27 strains incl. RC-14 and GR-1
Regular price$39.99 $1.33 a day
30 capsules
3-in-1 · for women
PB8 Vaginal Probiotic
21 strains led by RC-14 and GR-1, 6 billion CFU
Regular price$24.99 $0.83 a day
60 capsules
*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.
All six PB8 formulas, line by line
| Formula |  Original14B |  Vegetarian14B |  Immune15B |  Synbiotic 3-165B |  Women's50B |  Vaginal6B |
|---|---|---|---|---|---|---|
| CFU per serving at manufacture | 14 billion | 14 billion | 15 billion | 65 billion | 50 billion | 6 billion |
| Strains on the label | 8 | 8 | 31 (sold as 10+) | 31 | 27 | 21 |
| Serving | 2 capsules | 2 capsules | 1 capsule | 1 Delayed Release capsule | 1 Delayed Release capsule | 2 Delayed Release capsules |
| Servings per bottle | 60 | 60 | 60 | 30 | 30 | 30 |
| Capsule | Capsule | Vegetarian capsule | Capsule (hypromellose) | Delayed release capsule | Delayed release capsule | Delayed release capsule |
| Prebiotic | Inulin | Inulin | Acacia, oat hull fiber | Fiber blend, 100 mg | Fiber blend, 285 mg | Fiber blend, 600 mg |
| Postbiotics | Not listed | Not listed | Not listed | Yes | Yes | Yes |
| After opening | Best refrigerated | Best refrigerated | No line printed | Refrigerate | Refrigerate | Refrigerate |
| For | Adults | Adults | Adults | Adults | Women 18+ | Women 18+ |
| Lowest price per day | $0.28 a day | $0.32 a day | $0.42 a day | $1.33 a day | $1.33 a day | $0.83 a day |
| Buy | | | | | | |
Every PB8 bottle by price per day
The price of each bottle divided by the days it lasts at the label serving, from our last catalog update.
| Formula | Size | Lasts | Price | Per day |
|---|---|---|---|---|
| Original | 3 bottles × 120 capsules | 180 days | $49.52 | $0.28 a day |
| Original | 2 bottles × 120 capsules | 120 days | $34.23 | $0.29 a day |
| Original | 60 capsules | 30 days | $8.99 | $0.30 a day |
| Vegetarian | 2 bottles × 120 capsules | 120 days | $38.04 | $0.32 a day |
| Vegetarian | 3 bottles × 120 capsules | 180 days | $57.95 | $0.32 a day |
| Original | 120 capsules | 60 days | $19.49 | $0.32 a day |
| Vegetarian | 120 capsules | 60 days | $19.49 | $0.32 a day |
| Vegetarian | 60 capsules | 30 days | $11.62 | $0.39 a day |
| Immune | 60 capsules | 60 days | $25.49 | $0.42 a day |
| Vaginal | 60 capsules | 30 days | $24.99 | $0.83 a day |
| Synbiotic 3-1 | 30 capsules | 30 days | $39.99 | $1.33 a day |
| Women's | 30 capsules | 30 days | $39.99 | $1.33 a day |
Questions
Questions about choosing a PB8 formula
How do you compare PB8 formulas fairly?
By the count per serving and the capsules it takes to get there. The Original is 14 billion in two capsules, the Synbiotic 3-1 is 65 billion in one. The price per day on each card divides the price by the days a bottle lasts at the label serving.
Which PB8 bottle size gives you the lowest price per day?
Usually the larger bottle or the multi-pack of the same formula. Every card and product page prints the price per day of each size, so you can see it at a glance.
Are all PB8 formulas for adults?
Yes. The classic labels say "for adults", and the Women's and Vaginal labels say they are not intended for anyone under 18.