Bifido & Fibre Probiotics

30 sachets |up to 1 month's supply

Dr Sasivimol Ahmed PhD, PG Dip (Personalised Nutrition), BSc (Food Science)
This fantastic supplement contains Bifidobacterium lactis BB-12®, one of the most researched strains in the world.
Dr Sasivimol Ahmed
Dr Sasivimol Ahmed PhD, PG Dip (Personalised Nutrition), BSc (Food Science)

Who is it for?

Optibac Probiotics Bifido & Fibre combines the highly researched probiotic strain Bifidobacterium lactis BB-12 with 4g of prebiotic FOS fibers to increase natural gut bacteria, improve regularity and aid occasional constipation.

Buy online from our UK website
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  • Vegan


  • Dairy free

    Dairy free

  • Gluten free

    Gluten free

  • GMO free

    GMO free

  • During pregnancy

    During pregnancy

Key benefits

Bifidobacterium probiotic with FOS fibres

For anyone looking to buy a natural option for supporting digestive health and regularity*. 

  • Extensively researched Contains the renowned probiotic strain Bifidobacterium lactis BB-12®, which has been researched in thousands of people in gold standard clinical trials
  • Supports regular digestion Each of the synbiotic probiotic sachets contains 25 billion Bifidobacteria probiotic cultures and 4g of prebiotic Fructooligosaccharides (FOS), for a supplement which aids digestive health, including regularity and occasional constipation*
  • Scientifically proven Shown to survive stomach acidity and reach the gut alive to complement the natural gut bacteria
  • Provides 4g of prebiotic fibre The International Scientific Association of Probiotics & Prebiotics (ISAPP) suggests a minimum daily intake of 3-5g of fermentable fibres, such as FOS, which increase the natural gut bacteria
  • Stimulates immunological responses B. lactis BB-12® has been shown to stimulate immunological responses including immunoglobulins and cytokines*1
  • Easy to use This probiotic powder can be taken daily or as required, mixed into cool, non-acidic food or drink, with no refrigeration required
  • A more natural option Made using natural ingredients and free from artificial flavourings or colourings often found in other food & drinks containing live cultures; does not cause dependency 
  • The UK's most recommended brand Optibac is the brand of probiotic supplements most recommended by UK consumers


Note: FOS may initially result in flatulence in some people. These effects are temporary and should stop as the body adjusts. If effects continue for 3-4 days, consider reducing the dosage.

1. Jungerson, M. et al., (2014) The Science behind the Probiotic Strain Bifidobacterium animalis subsp. lactis BB-12®. Microorganisms. 2, 92-110.

Probiotic strains

  • Bifidobacterium lactis BB-12®

Added nutrients

  • Prebiotic FOS
See full ingredients list

Complements gut bacteria


General digestive

Customer Reviews

Customer reviews have been collected on our website or independently through Trustpilot where no moderation is possible. Reviews are not endorsed by us and should not be regarded as medical or health advice. For supplement advice, you can speak to one of our qualified experts. The top 3 reviews have been selected from our website, please click view all to explore more customer feedback.

I discovered these at the Pregnancy & Baby fair in Dublin and I cant rate them highly enough. I suffer from IBS, with constipation being my main symptom. I was taking a different supplement previously from another brand - but didn't see any benefits from it. But this supplement has changed my life! It has completely restored my bowel movements and I have now even been able to reintroduce lactose into my diet, which was previously a huge trigger for me. I couldn't recommend it more."

I began using Optibac Bifido & Fibre a couple months ago. The results have been unlike anything I have used in the past. I have struggled with sluggish bowels for over a decade. Increasing my fiber intake just usually results in more pain and harder stools, despite consuming nearly a gallon of fluid per day. Since taking Optibac Bifido & Fibre, I am experiencing a more definite urge to go to the toilet, better stool consistency, and more complete evacuation. At the beginning, I also experienced some gas, but I took this as a good sign that real work was being done in my intestines. I highly recommend this product to anyone who has struggled with chronic constipation that does not respond to the usual "fiber and fluids" recommendation.

I’ve struggled with IBS-C for years. I’ve reword everything, diet changes, over the counter & prescription laxatives, EVERYTHING. Nothing helped. I finally decided to try a probiotic. I put it off bc i hate taking pills but i found this powder one from optibac and was so excited. I mix it with apple juice and take it everyday. It’s been 2 months and now i FINALLY have a bowel movement EVERY DAY! I hardly leave reviews but this is the first and only product that has helped with my chronic constipation and Saying I’m ecstatic is an understatement. I’be been telling everyone i can about this miracle product 🤍

Help & advice

Our team of qualified experts are available for free personalised supplement advice. If you're not sure where to start or your needs have recently changed, please get in touch.

Louise Mason
Louise Mason BA(Hons) DipCNM Nutritional Therapist, DipCNM Naturopath, mANP
  • How to use

  • Ingredients

  • Leave a review

  • Delivery & returns

  • How to use

    Recommended use

    Dietary supplement suitable for adults and children (from 1 year onwards) with the following recommendations:

    • Initial use: Take 1 sachet (and up to 4 sachets if required) daily with food.
    • Ongoing use: 1 sachet will often suffice but more can be taken as desired or as professionally directed.
    • It is strongly recommended to drink plenty of water with this supplement.
    • Shake the sachet, then slowly sprinkle contents into a glass of water and vigorously swirl to dissolve fully.
    • Do not use a spoon to stir as this may cause the sachet contents to clump.
    • Do not exceed recommended daily dosage.


    • Store in a cool, dry place below 25°C (77 °F) and out of direct sunlight.


    ^Probiotics are not recommended for those with serious medical conditions e.g. those who are severely immunosuppressed, have pancreatitis, are in the ICU, have melaena, have a central venous catheter, infants with short bowel syndrome, or patients with open wounds following major surgery; unless under a doctor's care. Keep out of reach of children.

    Gut health supplements are not intended to prevent, treat or diagnose any medical conditions. If taking probiotic supplements for gut health, note that these should not be used as a substitute for a varied and balanced diet and a healthy lifestyle. If you are taking any medications or have a serious medical condition, consult a doctor before use. Optibac supplements will not cause dependency and may be used on an ongoing basis.

  • Ingredients


    Prebiotic FOS (Fructooligosaccharides); Standardised probiotic cultures (fructose, Bifidobacterium lactis BB-12®), silicon dioxide

    Each sachet guarantees 25 billion CFU micro-organisms + 4g prebiotic FOS fibers.

    bifidobacteria & fibre supplement fact panel


    • Vegetarian
    • Vegan
    • Gluten free
    • Dairy free
    • Flavorless
    • Suitable in pregnancy
    • Suitable during breastfeeding
    • Yeast free
    • GMO free
    • Free from artificial flavorings, colorings and preservatives
    • No chemicals or parabens
    • Not suitable for FODMAP diets
    Format Sachet
    CFU 25 billion
    Added Ingredients FOS Fibres
    Recommended Use 1 sachet daily
    Age Range Adult
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    Leave a review


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  • Delivery & returns

    USA standard shipping: $4.99 

    International postal order - typically deatched and delivered within 5-10 working days.
    Free standard shipping on orders over $60.

    USA express shipping: $6.99 

    We use DHL and orders are typically dispatched and delivered within 2-5 working days.

    Good to know

    • We'll send you an email to confirm once your parcel has been dispatched.
    • For delivery queries, please email
    • We are unable to ship orders to PO boxes.
    • Product prices on this website are always shown in US dollars (USD $) and exclude tax - tax is not applicable as orders are fulfilled from the UK.

    Worldwide Delivery

    • We deliver to more than 50 countries.
    • Shipping is charged at cost - please note that duties may apply.
    • Please allow 3-7 working days for delivery within Europe and 5-12 days to all other destinations. Includes order tracking.  
    • If you are located within the United Kingdom or Europe, we recommended switching to our UK website.
    • International deliveries might currently take a little longer due to the global coronavirus situation. Please refer to the webpage of our international delivery provider DHL to confirm the number of days it takes to receive your order and whether they currently ship to your country.
    • Most international delivery prices are dependent on the size and weight of your order and where it is being sent. You'll be shown the final price of shipping in the checkout, before payment, once we have your address and order details.
    • Long distance shipping and short-term exposure to high temperatures will not compromise the viability of our products. Customers living in very hot countries should store the products out of direct sunlight and refrigerate if the option is available.

    For more details regarding international orders, currency conversion and applicable tax for orders outside the USA, please take a look at our delivery FAQ.


    If you have changed your mind, you can return goods, at your cost, unopened within 14 days for refund or exchange, this does not affect your statutory rights.

Customer Questions

All questions answered by probiotic experts Dr Kate Stephens PhD (Food and Microbial Sciences) BSc(Hons) Medical Biology and Louise Mason BA(Hons) DipCNM Nutritional Therapist, DipCNM Naturopath, mANP

Optibac Probiotics Bifido & Fibre can be taken with or without food for occasional constipation or ongoing daily basis. Daily intake can vary for each person, depending on how you respond or if you're taking fibre in other supplements for constipation. Start with one sachet a day and increase (a sachet at a time), up to a maximum of 4 sachets daily, spread over the day.

Probiotic supplements are generally considered very safe to take on a daily basis; in fact research1,2,3 recommends daily use to support and maintain the gut microbiome. Probiotics are natural supplements and not a medication. They carry no risk of dependency and do not cause the bowel to become ‘lazy’.

Read references

Bifido & Fibre is a safe, gentle option for regularity, suitable for everyone from the age of 1 year including children1, pregnant women2, and older people3. It contains 25 billion CFUs of the probiotic strain Bifidobacterium lactis BB-12®, thought to be the most highly researched strain in the entire Bifidobacteria family! It has been extensively researched in numerous clinical trials, including one of the largest clinical trials on any probiotic strain, where it was researched in 1,200 people and shown to improve bowel regularity4*. This high-quality strain is offered in a unique combination with 4g of FOS prebiotic fibers, which have also been shown to reduce bowel transit time5, making this a perfect supplement to support occasional constipation*.

Read references

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