Probiotics on shelves since 1989
Six formulas, one label style you can read in full. Pick by the number on the seal, the capsules a day and what each formula is made to support.*
Classic · 1 capsule a day
15 billion CFU and 10+ strains in one capsule
Regular price$25.49 $0.42 a day
60 capsules
3-in-1 · delayed release
65 billion CFU, 31 strains, prebiotic fiber
Regular price$39.99 $1.33 a day
30 capsules
3-in-1 · for women
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
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.
Find your PB8
Answer for yourself. The match below comes straight from what each of our labels prints, and you can open the full label of any formula before you buy.
Not sure a probiotic is right for you at all? Your doctor or pharmacist knows your health and your medicines, so take the label to them.
PB8 formulas that fit your answers
14 billion CFU · Classic · 2 capsules a day
14 billion CFU · Classic · plant capsule
15 billion CFU · Classic · 1 capsule a day
65 billion CFU · 3-in-1 · delayed release
50 billion CFU · 3-in-1 · for women
6 billion CFU · 3-in-1 · for women
Women's and Vaginal formulas are for women 18 and over. For a man or for anyone, try "Digestive health" or "The immune system and digestion".
Side by side
Every row is taken from the labels. Two numbers matter most when you compare: the CFU per serving and the capsules it takes to get there. Every label in PB8 probiotics prints these lines in the same order.
| 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 | | | | | | |
Read the label
This is the Supplement Facts panel of PB8 Original, typed from the bottle. The numbered marks explain the lines people ask us about most.
Serving Size 2 Capsules1
Servings Per Container 60
| Amount Per Serving | % Daily Value | |
|---|---|---|
| Total Carbohydrate | < 1 g | < 1%† |
| Proprietary Probiotic Blend - 14 billion CFU††2 | 755 mg | ** |
Blend: microcrystalline cellulose, the eight strains below, magnesium stearate and silicon dioxide.
† Percent Daily Values are based on a 2,000 calorie diet. ** Daily Value not established.
Other ingredients: Capsule and Inulin.3
Contains no: gluten, eggs, milk, peanuts, tree nuts, or soy.
†† 14 billion good bacteria per serving at time of manufacture. Bacteria count will vary after time of manufacture.4
Store in a cool, dry place; best if refrigerated after opening.5
Two capsules make one serving of the Original, so a 120-capsule bottle is 60 days. The 3-in-1 formulas are one or two delayed release capsules.
The label gives the weight of the whole blend and lists the strains in it. It does not give a weight for each strain, and the FDA allows that for a blend.
Inulin from chicory root is listed under other ingredients. In the 3-in-1 formulas the prebiotic fiber has its own line in the table.
The count is at the time of manufacture. Bacteria are alive, and the count varies after that day. The label says so in its own footnote.
A cool, dry place for the closed bottle, and the refrigerator once you open it is best. The 3-in-1 labels go further and say: refrigerate after opening.
Strain map
Eight strains make up the Original. Read across a row to see which of the other formulas carry the same strain, with the same name and the same code. The full map covers every bottle in the PB8 formulas.
| Strain as printed | Original | Vegetarian | Immune | Synbiotic 3-1 | Women's | Vaginal |
|---|---|---|---|---|---|---|
| Lactobacillus acidophilus La-14® | In Original | In Vegetarian | Not in Immune | Not in Synbiotic 3-1 | Not in Women's | Not in Vaginal |
| Bifidobacterium lactis Bl-04® | In Original | In Vegetarian | In Immune | In Synbiotic 3-1 | In Women's | Not in Vaginal |
| Lactobacillus plantarum UF-217 | In Original | In Vegetarian | In Immune | Not in Synbiotic 3-1 | Not in Women's | Not in Vaginal |
| Bifidobacterium lactis BLa80 | In Original | In Vegetarian | In Immune | Not in Synbiotic 3-1 | Not in Women's | Not in Vaginal |
| Bifidobacterium lactis HN019™ | In Original | In Vegetarian | In Immune | In Synbiotic 3-1 | Not in Women's | Not in Vaginal |
| Lactobacillus rhamnosus GG | In Original | In Vegetarian | In Immune | In Synbiotic 3-1 | In Women's | In Vaginal |
| Bifidobacterium lactis Bi-07® | In Original | In Vegetarian | In Immune | Not in Synbiotic 3-1 | Not in Women's | Not in Vaginal |
| Lactobacillus acidophilus NCFM® | In Original | In Vegetarian | In Immune | Not in Synbiotic 3-1 | Not in Women's | Not in Vaginal |
Swipe sideways to see all six formulas.
Two ways to take it
Our Original, Vegetarian and Immune formulas are classic capsules. The Synbiotic 3-1, Women's and Vaginal formulas use a delayed release capsule and add prebiotic fiber and postbiotics to the cultures.
Counts and storage
A probiotic is a count of live bacteria, and live bacteria do not stay the same number for ever. Our labels print the count per serving on the day the capsules are made, and they say that the number varies after it. We print it that way because it is the number we can stand behind.
What you can do is follow the storage line on the bottle: keep the closed bottle in a cool, dry place, put the lid back after each serving, and keep an opened bottle in the refrigerator. That is what our labels ask, and the bottle in your hand is the one to read.
What people search for
Four searches people type after the name, each answered by bottles from PB8 supplements.
Our two women's formulas share a pair of strains, Lactobacillus reuteri RC-14 and Lactobacillus rhamnosus GR-1. The Women's Probiotic adds 25 more strains for 50 billion CFU in one capsule. The Vaginal Probiotic is two capsules with cranberry and beet root in its fiber blend.
See PB8 for womenIf you have always asked for "PB8 acidophilus", you are looking for our Original or Vegetarian formula. Both are two capsules a day with 14 billion CFU at manufacture and the same eight strains, two of them Lactobacillus acidophilus: La-14 and NCFM.
See PB8 AcidophilusThree PB8 formulas are a single capsule a day. Immune Support is a classic capsule with 15 billion CFU. Synbiotic 3-1 and Women's are delayed release capsules with 65 and 50 billion CFU, prebiotic fiber and postbiotics, and Women's is for women 18 and over.
See PB8 once dailyOur vegetarian probiotic is the Original blend in a capsule of plant cellulose and water: eight strains, 14 billion CFU per two capsules and inulin from chicory root, with no gelatin. It comes in the same four sizes as the Original, from a 60-capsule bottle to a pack of three.
Open PB8 Vegetarian Probiotic198937 years on US shelves
About the brand
PB8 has been on shelves since 1989, and the Original still carries the eight strains it started with. Every formula in the PB8 family of formulas follows the same habit since then: each strain is named on the label by genus, species and code, so you know what you take and can hold it against any other bottle.
Six formulas now sit in two lines. The classic line is two capsules or one, with inulin or fiber. The 3-in-1 line is one or two delayed release capsules with fiber, cultures and postbiotics. What each one is made to support is printed on its label, and you will find the whole story of PB8 on a page of its own.
About PB8Probiotics 101
Labels, storage and the words printed on every bottle of the PB8 probiotic line.
Serving size, CFU at manufacture, proprietary blends, strain codes, Daily Values and the asterisk: every line of a probiotic label, using the PB8 labels.
What PB8 labels say about storage, why a live count varies after manufacture, and how to keep a bottle at home, at work and on a trip.
The scientific definitions of probiotic, prebiotic, postbiotic and synbiotic, and where each part sits on the six PB8 labels.
Questions
Every formula on this site has a buy button that opens it at our retail partner, where the order, payment, shipping and returns happen. The price you see here comes from our last catalog update, and the checkout price is the one you pay.
For everyday digestive support,* most people start with PB8 Original: two capsules a day, 14 billion CFU, eight strains. If you avoid gelatin, take the Vegetarian. If you want one capsule a day, look at Immune Support or the Synbiotic 3-1. The comparison page puts all six side by side.
Keep the closed bottle in a cool, dry place. After opening, the Original and Vegetarian labels say refrigeration is best, and the Synbiotic 3-1, Women's and Vaginal labels say to refrigerate.
CFU are colony-forming units, the count of live bacteria in a serving. Our labels give the count at the time of manufacture and say it varies after that day. For the Original, 14 billion is in a serving of two capsules.
Every PB8 label says the formula contains no gluten, eggs, milk, peanuts, tree nuts or soy.
PB8 has been on shelves since 1989, 37 years, and the Original still carries the eight strains its name points to.
