Optibac Probiotics Ireland: Every Day vs For Women — Which One Should You Take?
Two products. Thousands of Irish searches every month. One clear answer on which one suits you. This guide covers Optibac Every Day and Optibac For Women — the two best-selling Optibac products available from Probiotic.ie in Ireland.
Both Optibac Every Day and Optibac For Women are food supplements regulated by the FSAI (Food Safety Authority of Ireland). No authorised health claim under EC Regulation 1924/2006 is made for the live culture strains in either product on this page. These products are not medicines and are not intended to diagnose, treat, cure, or prevent any disease. References to clinical research in this guide relate to the individual strains as studied compounds — not to the commercial products directly.
Optibac Every Day is a six-strain, 5 billion CFU daily live culture supplement with prebiotic FOS, suitable for adults and children aged 1+, formulated for daily gut flora balance and overall wellbeing. Optibac For Women is a specialist three-strain, 2.5 billion CFU supplement containing Lactobacillus rhamnosus GR-1 and Lactobacillus reuteri RC-14 — extensively published strains for female intimate flora studied in clinical trials involving over 2,500 women (Optibac, sourced from Chr. Hansen, 2025). Both are FSAI-regulated food supplements available in Ireland from Probiotic.ie, an authorised Optibac retailer. Neither product is a medicine, and no authorised EU health claim is made for the live culture strains in either product. Both are vegan, gluten free, and require no refrigeration.
Optibac probiotics (Optibac Probiotics Ltd) definition: Optibac is a UK-founded probiotic supplement brand established in 2002, producing targeted live culture (probiotic) supplements based on clinically researched bacterial strains, formulated for specific health contexts including general gut health, female intimate flora, travel, and antibiotic recovery.
Choose Optibac Every Day if you want daily general gut support — it covers digestive flora balance and overall wellbeing for adults, children, and men. Choose Optibac For Women if your primary concern is vaginal flora balance or intimate health — it contains L. rhamnosus GR-1 and L. reuteri RC-14, the most extensively published strains for female intimate flora in peer-reviewed research.3 Both can be taken together safely. Both are available from Probiotic.ie, an authorised Optibac retailer in Ireland, with nationwide tracked delivery.
- Brand origin: Optibac Probiotics Ltd, UK — founded 2002; described as UK and Ireland's most recommended probiotic brand in an independent consumer survey of 1,000 people (August 2025, Optibac website T&Cs apply)
- Optibac Every Day CFU: 5 billion CFU per capsule, guaranteed until expiry
- Optibac For Women CFU: 2.5 billion CFU per capsule, guaranteed until expiry
- Every Day strains: 6 strains — L. rhamnosus Rosell-11, L. acidophilus/helveticus Rosell-52, B. longum Rosell-175, B. breve Rosell-70, B. bifidum Rosell-71, L. lactis Rosell-1058 + 88mg FOS prebiotic
- For Women strains: 3 strains — L. rhamnosus GR-1, L. reuteri RC-14, L. paracasei F-19
- Refrigeration required? No — both are shelf-stable until expiry
- Vegetarian/vegan suitable? Yes — both use HPMC vegetarian capsules
- Gluten free? Yes — both products
- Irish regulatory status: Food supplements under FSAI guidelines — not medicines
- Irish VAT rate on supplements: 13.5%
- Available in Ireland from: Probiotic.ie — authorised Optibac retailer
- Optibac Every Day — strains, evidence, who it suits
- Optibac For Women — strains, evidence, who it suits
- Every Day vs For Women — head-to-head comparison table
- Clinical evidence — what the research shows
- Dosage, timing, and how to take them
- Side effects and safety
- Optibac in Ireland — regulatory status and where to buy
- Frequently asked questions
Optibac Every Day — What It Is and Who It Suits
Optibac Every Day (formerly labelled "For Daily Wellbeing") is Optibac's flagship general live culture supplement, and consistently one of the most popular Optibac products stocked by Probiotic.ie in Ireland. It is designed for anyone who wants a daily, broad-spectrum supplement of live bacterial cultures to support gut flora and overall wellbeing.
Each capsule provides 5 billion live cultures from six strains, combined with 88mg of fructooligosaccharide (FOS) prebiotic fibre. FOS acts as a food source for beneficial gut bacteria, making Every Day a synbiotic (combined probiotic and prebiotic) supplement.
Strains in Optibac Every Day
Lead strain. Studied for gastric transit survival and human gut colonisation. Jacobsen et al. (Appl Environ Microbiol, 1999, PMID 10543808) confirmed colonisation ability in humans.
Evidence: Human colonisation studies confirmedWell-researched acidophilus strain. Studied for gut barrier support, digestive health, and tolerability alongside antibiotic use.2
Evidence: Multiple human studies; 20+ years researchLarge intestine coloniser. Bifidobacterium species are associated with gut barrier integrity and immune signalling in multiple observational and intervention studies.
Evidence: Established in gut health research; human studiesSupporting strains providing broad species coverage across Bifidobacterium and Lactococcus genera, with individual research backing for gut flora diversity.
Evidence: Individual strain research; multi-strain synergy proposedEvery Day is suitable for adults, children aged 1 and over, pregnant women, breastfeeding mothers, vegetarians, and vegans. It does not require refrigeration. The capsule can be opened and mixed with cool food or drink for those unable to swallow capsules.
Adults and children wanting daily gut support. Men, women, and children aged 1+. Those looking for a sugar-free alternative to probiotic yoghurt drinks. People who have recently completed an antibiotic course. Anyone wanting broad-spectrum daily gut flora maintenance.
Optibac For Women — What It Is and Who It Suits
Optibac For Women (also labelled "Intimate Flora") is a specialist probiotic designed specifically for female vaginal and intimate health. It is the most targeted Optibac product for women with concerns related to vaginal pH, bacterial vaginosis (BV), thrush, or urinary tract health.
Each capsule provides 2.5 billion live cultures from three strains — two of which, Lactobacillus rhamnosus GR-1 and Lactobacillus reuteri RC-14, are among the most extensively published strains in peer-reviewed research on the vaginal microbiome, with over 30 years of published studies behind them.3
Strains in Optibac For Women
Isolated from the healthy female genitourinary tract. Reid et al. (FEMS Immunol Med Microbiol, 2003, PMID 12628548) confirmed oral supplementation results in vaginal colonisation. Studied in trials involving over 2,500 women.
Evidence: 30+ years; multiple RCTs in women; vaginal colonisation confirmedPaired with GR-1 in the majority of clinical trials. Shown to adhere to the vaginal wall lining and remain detectable in vaginal swabs up to 3 weeks after supplementation ceases.4
Evidence: 25+ published studies; BV and vaginal flora RCTsA third supporting strain. A 2006 clinical study found that oral L. paracasei F-19 supplementation was associated with improved vaginal pH and reduced odour in women with vaginosis.
Evidence: Supporting clinical evidence; fewer RCTs than GR-1/RC-14All three strains were isolated from the healthy female genitourinary tract. Multiple clinical trials have used vaginal swab verification to confirm that these strains can be detected in the vaginal flora following oral supplementation, without a pessary.
Evidence: Transit mechanism confirmed in human RCTs; individual response may varyWomen concerned with vaginal health, pH balance, or intimate flora. Those experiencing recurring BV, thrush, or UTIs (to be taken alongside, not instead of, prescribed treatment). Pregnant and breastfeeding women. Women during perimenopause and menopause, when vaginal flora changes are common. Women who have been prescribed antibiotics and want to protect intimate flora during and after the course.
The clinical research discussed in this article relates to the individual strains L. rhamnosus GR-1 and L. reuteri RC-14 as studied compounds. This research should not be read as a claim that Optibac For Women prevents, treats, or cures bacterial vaginosis, thrush, or any other medical condition. Optibac For Women is a food supplement, not a medicine. If you have a diagnosed intimate health condition, consult your GP.
Optibac Every Day vs For Women — Which Should You Take?
The right choice depends on your primary goal. This table compares both products across all key criteria.
| Feature | Optibac Every Day | Optibac For Women |
|---|---|---|
| Primary purpose | Daily gut flora balance and general wellbeing — formulated for all adults and children | Formulated specifically for women — contains strains extensively studied in female intimate flora research |
| Number of strains | 6 strains | 3 strains |
| CFU per capsule | 5 billion CFU | 2.5 billion CFU |
| Key strains | L. rhamnosus Rosell-11, L. acidophilus Rosell-52, B. longum Rosell-175 + 3 more | L. rhamnosus GR-1, L. reuteri RC-14, L. paracasei F-19 |
| Includes prebiotic FOS | Yes — 88mg FOS per capsule | No |
| Years of research behind strains | 20+ years | 30+ years (GR-1 and RC-14) |
| Vaginal colonisation confirmed | No — gut-targeted strains | Yes — multiple clinical trials |
| Suitable for men? | Yes | No (formulated for women) |
| Suitable for children aged 1+? | Yes | Not recommended (adult-specific use) |
| Used in pregnancy research? | Yes — strains studied in pregnant women | Yes — GR-1/RC-14 used in pregnancy RCTs; consult GP if high-risk |
| Vegan / vegetarian? | Yes — HPMC capsule | Yes — HPMC capsule |
| Gluten free? | Yes | Yes |
| Refrigeration required? | No — shelf stable | No — shelf stable |
| Can be taken together? | Yes — different strains, different targets, no interaction | |
| Best choice if... | You want daily broad gut support — suitable for all adults and children | You want specialist intimate flora support — women only |
Best for daily general use (all adults, men, children 1+): Optibac Every Day
Best for women's intimate flora: Optibac For Women — contains L. rhamnosus GR-1 and L. reuteri RC-14, strains used in vaginal flora RCTs3
Best if unsure: Optibac Every Day — broader formulation, suitable for all
Best if taking both: Take both with food at breakfast; if on antibiotics, separate from the antibiotic dose by 2 hours
Both are: Food supplements — not medicines. Neither replaces GP advice for diagnosed conditions.
What Does the Research Actually Show?
What is well-supported for Optibac For Women: Vaginal colonisation by L. rhamnosus GR-1 and L. reuteri RC-14 following oral supplementation — confirmed in multiple RCTs including Reid et al. (FEMS Immunol Med Microbiol, 2003, PMID 12628548).
What is well-supported for Optibac Every Day: Gastric transit survival and human gut colonisation by L. rhamnosus Rosell-11 — confirmed by Jacobsen et al. (Appl Environ Microbiol, 1999, PMID 10543808).
What is not proven: Neither product is clinically proven to treat diagnosed medical conditions as a standalone intervention. For Women is a food supplement — not a replacement for prescribed treatment of BV or thrush.
Evidence limitation: Most probiotic RCTs use specific strains at specific doses — results from one strain at one CFU count cannot be extrapolated to all probiotics generally.
Clinical studies cited in this guide were identified via PubMed search using the terms "Lactobacillus rhamnosus GR-1", "Lactobacillus reuteri RC-14", "Lactobacillus rhamnosus Rosell-11", and "vaginal microbiome probiotic RCT". Inclusion criteria: human trials, English language, published in peer-reviewed journals. Both positive and null-result studies are included. The limitation card below summarises the overall evidence gap.
How to Take Optibac Every Day and For Women
Both products are once-daily capsules, taken with food. Breakfast is the recommended time, when stomach acidity is at its most neutral — this maximises the number of live cultures that survive transit to the gut or, in the case of For Women, to the vaginal microbiome.
| Dosage factor | Optibac Every Day | Optibac For Women |
|---|---|---|
| Standard adult dose | 1 capsule daily | 1–2 capsules daily |
| Maximum daily dose | 2 capsules daily if desired | 2 capsules daily |
| Best taken with | Food, preferably breakfast | Food, preferably breakfast |
| Suitable from age | 1 year+ | Adult women (18+) |
| Duration of use | Ongoing daily use — no dependency risk | Ongoing or intensive use |
| Capsule can be opened? | Yes — mix with cool food or drink | Yes — mix with cool food or drink |
Neither product causes dependency. Both can be used on an ongoing basis or occasionally. If taking alongside antibiotics, both can be taken on the same day — separate the probiotic and antibiotic by 2 hours where possible.
What to Expect — Timeline
Side Effects and Safety of Optibac Probiotics
Both Optibac Every Day and Optibac For Women are generally well tolerated. Both are free from artificial additives, added sugars, artificial flavourings, and colourings.
| Safety consideration | Detail |
|---|---|
| Most common reported effect | Mild temporary digestive adjustment (gas, bloating) in first 1–7 days |
| Allergen status | Gluten free; dairy not an ingredient (produced in dairy-handling facility — minute traces possible in Every Day) |
| Suitable in pregnancy? | Yes — both products |
| Suitable for immunocompromised individuals? | Consult GP — probiotic use in severe immunosuppression requires medical guidance |
| Interaction with antibiotics? | Both can be taken during antibiotic courses — separate by 2 hours where possible |
| Drug interactions | No known drug interactions for standard probiotic strains at these doses |
| Maximum duration | No maximum — both products can be used on an ongoing basis |
If you have a serious immune condition, are undergoing chemotherapy, have a central venous catheter, or have a history of severe gastrointestinal disease, consult your GP before starting any probiotic supplement. If intimate health symptoms persist or worsen after 4 weeks of use, see your GP — Optibac For Women supports but does not replace medical treatment.
Optibac Probiotics Ireland — Regulatory Status and Where to Buy
Both Optibac Every Day and Optibac For Women are regulated in Ireland by the Food Safety Authority of Ireland (FSAI) as food supplements under Irish food supplement legislation. Neither product is regulated as a medicine by the HPRA (Health Products Regulatory Authority).
This means no prescription is required. Both products are legally available for purchase across Ireland. Irish VAT at 13.5% applies to food supplements.
No authorised EU health claim under EC Regulation 1924/2006 is currently approved for the live culture strains in either product. All content on this page refers to these products as food supplements, not medicines.
Optibac products are available for delivery to all counties in Ireland. Probiotic.ie, an authorised Optibac retailer, ships nationwide with tracked delivery — including to Dublin, Cork, Galway, Limerick, Waterford, Kilkenny, Wexford, Sligo, Donegal, and all other counties. Orders placed before the daily cut-off are typically dispatched the same working day.
Probiotic.ie is an authorised retailer of Optibac products in Ireland. Both Optibac Every Day and Optibac For Women are stocked and available for nationwide tracked delivery across Ireland — Dublin, Cork, Galway, Limerick, Waterford, and all counties. All products sold by Probiotic.ie are genuine Optibac products supplied within shelf life.
The strain research referenced in this article relates to the bacterial strains used in Optibac Every Day as studied compounds. It should not be read as a claim that this product produces these effects in all users. Optibac Every Day is a food supplement, not a medicine. No authorised EU health claim is made for the probiotic strains in this product.
Optibac Every Day Capsules — Ireland
Six-strain daily live culture supplement with 5 billion CFU and 88mg FOS prebiotic per capsule. Formulated for daily use by adults and children aged 1+.
Probiotic.ie — Authorised Optibac Retailer · Nationwide Ireland tracked delivery · Food supplement — not a medicine · Irish VAT 13.5% included
The strain research referenced for Optibac For Women relates to L. rhamnosus GR-1 and L. reuteri RC-14 as studied compounds in clinical settings. It should not be read as a claim that this product prevents or treats BV, thrush, UTI, or any other condition. Optibac For Women is a food supplement, not a medicine. No authorised EU health claim is made for the probiotic strains in this product.
Optibac For Women — Intimate Flora — Ireland
Specialist three-strain probiotic for female intimate flora. Contains L. rhamnosus GR-1 and L. reuteri RC-14 — 30+ years of clinical research.
Probiotic.ie — Authorised Optibac Retailer · Nationwide Ireland tracked delivery · Food supplement — not a medicine · Irish VAT 13.5% included
- Optibac Every Day is a six-strain, 5 billion CFU daily probiotic with 88mg FOS prebiotic, suitable for adults and children aged 1+, both men and women.
- Optibac For Women is a three-strain, 2.5 billion CFU probiotic formulated specifically for female intimate flora, containing L. rhamnosus GR-1 and L. reuteri RC-14.
- L. rhamnosus GR-1 and L. reuteri RC-14 — the primary strains in Optibac For Women — have been trialled in over 2,500 women across more than 25 published studies (Optibac Probiotics, 2025).
- Reid et al. (FEMS Immunol Med Microbiol, 2003, PMID 12628548) confirmed that oral supplementation with GR-1 and RC-14 results in measurable vaginal colonisation without pessary use.
- Optibac For Women is not a treatment for BV or thrush — it is a food supplement that supports vaginal microbiome balance alongside, not instead of, prescribed medical treatment.
- Both Optibac products can be taken simultaneously and are safe for use during pregnancy and breastfeeding.
- Neither product requires refrigeration — both are shelf-stable until the printed expiry date.
- In Ireland, both Optibac products are regulated by the FSAI as food supplements — not medicines. Irish VAT at 13.5% applies.
- Probiotic.ie is an authorised Optibac retailer in Ireland with nationwide tracked delivery across all counties.
Frequently Asked Questions — Optibac Probiotics Ireland
Optibac Every Day is a six-strain general probiotic with 5 billion CFU and prebiotic FOS, designed for daily gut health for all adults and children aged 1+. Optibac For Women contains three specialist strains — L. rhamnosus GR-1, L. reuteri RC-14, and L. paracasei F-19 — at 2.5 billion CFU, specifically formulated to support the female vaginal microbiome. They target different areas of the body and serve different purposes.
Yes. Both products can be taken together safely. They contain different strains targeting different body systems — Every Day supports the gut, For Women supports the vaginal microbiome. Many women take both simultaneously. Taking both with breakfast is the recommended approach.
Yes. Both Optibac Every Day and Optibac For Women are available from Probiotic.ie, an authorised Optibac retailer in Ireland. Probiotic.ie offers nationwide tracked delivery across all Irish counties including Dublin, Cork, Galway, Limerick, and Waterford.
Optibac For Women is considered suitable for use during pregnancy, breastfeeding, and menopause. The strains GR-1 and RC-14 have been studied in pregnant women. Women with high-risk pregnancies or specific medical conditions should consult their GP or midwife before starting any supplement.
Most clinical trials using GR-1 and RC-14 run for 4 to 8 weeks. Anukam et al. (Microbes and Infection, 2006, PMID 16697231) observed measurable vaginal flora improvements within 4 weeks of supplementation. For general preventive use, consistent daily use over 4 to 12 weeks is the period most commonly used in published research.
No. Optibac Every Day is shelf-stable and does not require refrigeration. The strains are guaranteed at 5 billion CFU until the printed expiry date under ambient storage. Store in a cool, dry place away from direct sunlight and do not remove the desiccant sachet from the jar.
Both Optibac products are generally well tolerated. Mild, temporary digestive changes such as bloating or gas may occur in the first few days as the microbiome adjusts. These typically resolve within a week. Those with severe immune compromise should consult a GP before using probiotic supplements.
Yes. Both Optibac Every Day and Optibac For Women use HPMC vegetarian capsules. Both are suitable for vegetarians and vegans, are gluten free, and are free from added sugars, artificial flavourings, and colourings.
Yes. Both Optibac Every Day and Optibac For Women are food supplements regulated under FSAI guidelines. They are not medicines and do not require a prescription. No authorised EU health claim under EC Regulation 1924/2006 is made for the strains in either product. Irish VAT at 13.5% applies.
Optibac Every Day and Optibac For Women are available from Probiotic.ie — an authorised Optibac retailer in Ireland — with nationwide tracked delivery. Both products are also available in selected Irish pharmacies and health stores. Buying from an authorised retailer ensures genuine product within shelf life.
Related Articles from Probiotic.ie
Sources
- Jacobsen CN et al. Screening of probiotic activities of 47 strains of Lactobacillus spp. by in vitro techniques and evaluation of the colonisation ability of 5 selected strains in humans. Appl Environ Microbiol. 1999;65(11):4949-4956. PMID 10543808. — https://pubmed.ncbi.nlm.nih.gov/10543808/
- Sanders ME, Klaenhammer TR. The scientific basis of Lactobacillus acidophilus NCFM functionality as a probiotic. J Dairy Sci. 2001;84(2):319-331. PMID 11233016. — https://pubmed.ncbi.nlm.nih.gov/11233016/
- Reid G et al. Oral use of Lactobacillus rhamnosus GR-1 and L. fermentii RC-14 significantly alters vaginal flora: randomized, placebo-controlled trial in 64 healthy women. FEMS Immunol Med Microbiol. 2003;35(2):131-134. PMID 12628548. — https://pubmed.ncbi.nlm.nih.gov/12628548/
- Anukam K et al. Augmentation of antimicrobial metronidazole therapy of bacterial vaginosis with oral probiotic Lactobacillus rhamnosus GR-1 and Lactobacillus reuteri RC-14. Microbes Infect. 2006;8(6):1450-1454. PMID 16697231. — https://pubmed.ncbi.nlm.nih.gov/16697231/
- Optibac Probiotics. For Women — Product Information and Clinical References. 2025. — https://www.optibacprobiotics.com/uk/product/probiotics-for-women
- Optibac Probiotics. Every Day — Product Information and Clinical References. 2025. — https://www.optibacprobiotics.com/product/every-day-probiotics
- FSAI. Food Supplements Legislation. Food Safety Authority of Ireland, 2025. — https://www.fsai.ie/legislation/food-legislation/food-supplements
- Chen Y et al. Probiotic Lacticaseibacillus rhamnosus GR-1 and Limosilactobacillus reuteri RC-14 as an adjunctive treatment for bacterial vaginosis do not increase the cure rate in a Chinese cohort. Front Cell Infect Microbiol. 2021;11:669901. PMID 34307191. — https://pubmed.ncbi.nlm.nih.gov/34307191/