Natural Factors Natural Factors - Women's Ultra Probiotic 55bil 30vcaps NF, 30 vcaps
Ultimate Probiotic Women’s Ultra 55 Billion formula features an advanced proprietary blend of 9 gastric-resistant strains and provides a powerful concentration of 55 billion active cells to provide gut and immune support for intestinal and digestive needs.

Price
Regular Canadian retail price: $31.98 CAD. Price Vault members pay below retail on this product. Member pricing is private and shown after a free opt-in, with no membership fee, no minimum order and no subscription.
In stock. Free shipping across Canada on orders over $89, flat $9.95 under that. 30 days to request a return, with return shipping paid by the customer. Ships from Victoria, BC.
See member pricing on Natural Factors Natural Factors - Women's Ultra Probiotic 55bil 30vcaps NF
Why people keep reordering it
- Researched strains
- Specific, studied strains at counts high enough to reach your gut.
- Guaranteed live cultures
- Potency held through the end of shelf life, not just at manufacture.
- Digestive balance
- Supports regularity, bloating and a healthy gut barrier.
Best suited to: tried a 10 billion probiotic, felt nothing, wants bifidobacterium, not just lactobacillus, rebuilding after a rough gut stretch, keeps supplements at home, not in a bag.
What the research supports
One capsule delivers 55 billion CFU across nine strains, split evenly between Lactobacillus and Bifidobacterium. The bottle of 30 lasts a month.
Studies use 1 to 10 billion CFU a day, some go to 100 billion.
- Digestive regularity (evidence: moderate, from randomized controlled trial, meta-analysis)
- Mixed Lactobacillus and Bifidobacterium strains ease bloating and normalize stool frequency in trials, though results depend more on which strains are used than how many cells you take.
- Gut recovery (evidence: moderate, from randomized controlled trial, meta-analysis)
- After anything disrupts your gut bacteria, a high daily count of mixed strains shortens how long that disruption lasts, so your normal mix returns sooner.
- Immunity (evidence: limited, from randomized controlled trial, small human trials)
- Two of the nine strains here have shifted immune markers in small human trials, but that does not guarantee the same effect across the whole blend.
Read the literature: Digestive regularity on PubMed, Gut recovery on PubMed, Immunity on PubMed.
Is it right for you
Worth it if
- Tried a 10 billion probiotic, felt nothing
- This steps up to 55 billion across nine strains in one capsule instead of making you stack two bottles.
- Wants Bifidobacterium, not just Lactobacillus
- Five of the nine strains are Bifidobacterium and they hold half the 55 billion, which is the genus that makes up most of the adult large intestine.
- Rebuilding after a rough gut stretch
- A large multi-strain dose taken daily is the situation where a high cell count actually earns its price, rather than as everyday maintenance.
- Keeps supplements at home, not in a bag
- The count only holds if the bottle stays cold, so this suits a fixed kitchen routine.
Look elsewhere if
- Someone buying this for vaginal flora
- This is a general gut and immune blend regardless of how it is named. Look for a formula that lists Lactobacillus rhamnosus GR-1 and Lactobacillus reuteri RC-14, the two strains actually trialled for urogenital flora.
- Someone who travels or keeps it at a desk
- A spore-forming Bacillus coagulans or Bacillus subtilis product holds its count at room temperature and will not quietly die in a warm bag.
- First probiotic, mild everyday bloating
- Start at 5 to 10 billion CFU. It costs less per day and it is the range most digestive comfort trials actually used.
What to expect
A few days of extra gas or looser stools while flora shifts is common and usually settles within a week. Judge regularity and bloating after two to four weeks of daily use, not after three days.
How it compares
- Compared with a 10 billion CFU daily multi-strain probiotic
- Five and a half times the cells, nine strains identified by strain code rather than species alone, and a deliberate 27.5 billion each side rather than a token Bifidobacterium presence. The tradeoff: It costs more per day, it has to occupy fridge space, and for ordinary daily maintenance there is no clear evidence 55 billion outperforms 10 billion.
- Compared with eating yogurt or kefir daily
- One capsule is a counted 55 billion cells of nine identified strains. Fermented dairy varies batch to batch and almost never names a strain. The tradeoff: Yogurt and kefir bring protein, calcium and food matrix that a capsule does not, at a fraction of the cost per day.
Product details
- Medicinal ingredients
- Proprietary synergistic blend:, Total bacterial culture, Lacto-probiotic blend, Bifido-probiotic blend
- Ingredient form
- vcaps
- Servings per container
- 30
- Suggested use
- 1 capsule daily or as directed by health care practitioner. Take at least 2-3 hours before or after antibiotics.
- Country of manufacture
- Canada
- Independent testing
- ISURA
- Certifications
- Non-GMO, Made in Canada
- Storage
- Store in a cool, dry place
- Brand
- Natural Factors
How to take it
1 capsule daily or as directed by health care practitioner. Take at least 2-3 hours before or after antibiotics.
- Store in a cool, dry place away from direct light.
- Keep out of reach of children.
- Consult a practitioner if you are pregnant, nursing or on medication.
Ingredients
Each vegetarian capsules contains
- Proprietary synergistic blend:
- Total bacterial culture
- 55 billion* CFU†
- Lacto-probiotic blend
- 27.5 billion CFU†
- - Lacticaseibacillus paracasei (HA-196), Lactiplantibacillus plantarum (HA-119), Lactobacillus helveticus (HA-122), Lacticaseibacillus rhamnosus (HA-111)
- Bifido-probiotic blend
- 27.5 billion CFU†
- Bifidobacterium breve (HA-129), Bifidobacterium longum subsp. longum (HA-135), Bifidobacterium animalis subsp. lactis (HA-194), Bifidobacterium bifidum (HA-132), Bifidobacterium longum subsp. infantis (HA-116)
CFU: colony forming units
Non-medicinal ingredients
Vegetarian capsule (carbohydrate gum [cellulose], purified water), potato starch, vegetable grade magnesium stearate (lubricant), ascorbic acid.
Free from
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. Refrigeration Required
Interactions and cautions
- Medications
- May interact with certain prescription medications. Review with your pharmacist if you take daily medication.
- Timing
- If taking antibiotics, separate doses by 2 to 3 hours.
- Pregnancy and breastfeeding
- Consult a healthcare practitioner before use if pregnant or breastfeeding.
- General
- Use only as directed. Discontinue and consult a practitioner if you experience an adverse reaction.
This product is not intended to diagnose, treat, cure or prevent disease. Consult a healthcare practitioner before use. Free certified advisors are available at 1-888-386-1211, Mon to Fri, 9am to 5pm PT.
Questions about Natural Factors - Women's Ultra Probiotic 55bil 30vcaps NF
- Is this the genuine, authentic product?
- Yes. It is identical to what you would pay full price for anywhere else, sourced through our authorized supplier relationships.
- How is the price below retail?
- We buy direct, with nobody in the middle taking a cut, and we sell it for close to what we paid. You see the price privately because you have unlocked the Vault.
- How fast does it ship?
- Orders placed before 12pm PT are processed the same day and ship within two business days. Shipping is free over $89, and a flat $9.95 under that.
- Can I return it?
- You have 30 days after it arrives to request a return. Product must be unused, in its original packaging, with proof of purchase, and return shipping is paid by you. Find it cheaper anywhere in Canada and we will match the price.