Bifido & Fibre Probiotics

10 sachets


(ex. tax)
4.8/5 (35 reviews) Read verified product reviews

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Free standard delivery on orders over $100

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Suitable for



Gluten free

Gluten free

During pregnancy

During pregnancy

Dairy free

Dairy free

GMO free

GMO free

During breastfeeding

During breastfeeding

See full ingredients list


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

bifidobacteria & fibre press

Probiotic Strains

  • Bifidobacterium lactis BB-12®
  • Product Description

  • How To Use

  • Ingredients

  • Help & Advice

  • Reviews

  • Delivery & Returns

  • Product Description

    Who is Optibac Probiotics Bifido & Fibre for​?

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

    Key benefits

    • Scientifically formulated to improve regularity and help with occasional constipation*
    • The strain Bifidobacterium lactis BB-12® has been clinically trialed for regularity in thousands of people of all ages and is thought to be the most researched strain of Bifidobacteria in the world
    • Each sachet provides 25 billion CFU friendly bacteria + 4g of Fructooligosaccharide (FOS) fibers The billions count is guaranteed until end of expiry
    • Scientifically proven to survive stomach acidity and reach the gut alive
    • Made with natural ingredients and does not cause dependency
    • Bifidobacterium lactis BB-12® has been shown to stimulate immunological responses, such as immunoglobulins and cytokines1
    • The International Scientific Association of Probiotics & Prebiotics (ISAPP) suggests a minimum daily intake of 3-5g of fermentable fibres, such as FOS fibres. One sachet of Bifido & Fibre provides 4g of FOS
    • Complements your natural gut bacteria
    • Recommended for daily use or as needed
    • Free from artificial flavorings or colorings that may be found in other food & drinks containing probiotics
    • Easy to take on the go – no refrigeration required
    • From the UK’s most trusted & recommended brand of friendly bacteria supplements. As determined in an independent survey of 1000 British women+.

    Available in two pack sizes of 10 or 30 sachets.

    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.

    Now dispatching in our new look!

    We are introducing new, eco-conscious packaging this year, and the new designs will update gradually from product to product to minimize any waste. Please bear with us as you may receive orders with both current and new packaging over the coming months. We hope you like the new look! 

    Update May 2021: This supplement was previously called OptiBac 'Bifidobacteria & fibre' in the EU and 'For maintaining regularity' in the rest of world. It's exactly the same great formula, which previously advertised 5 billion CFU per sachet but has now been updated to 25 billion CFU per sachet (based on latest stability data). Existing customers can continue to take it just as before!



    Customer feedback collected via independent review platform Trustpilot. See 'Reviews' tab for more customer opinions collected via our own website.


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

  • 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.

    Customer Questions

    All questions answered by probiotic experts Dr Kate Stephens PhD (Food and Microbial Sciences) BSc(Hons) Medical Microbiology Kerry Beeson BSc (Nut. Med.) Nutritional Therapist.

    What makes Bifido & Fibre unique?

    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 fibres, which have also been shown to reduce bowel transit time5, making this a perfect supplement to support occasional constipation*.

    How many sachets should I take a day?

    The number of Bifido & Fibre sachets required to achieve the desired effect can vary from person to person, so may require some initial ‘trial and error’. It is recommended to start with one sachet a day and see how you respond. If you feel you would benefit from taking more, the number of sachets taken can be increased (one sachet at a time), up to a maximum of 4 sachets per day spread over the course of the day. This supplement can be taken with or without food and many people like to take a sachet with each meal, and one before bedtime, though you can see what suits you best.

    If you require a higher amount initially, you may be able to reduce this after just a week or two, or once your regularity has improved. After this initial period of time, most people find 1 or 2 sachets each day to be effective to maintain the positive effects*. Equally, it’s fine to use the supplement on an ad hoc basis as required, or to take 1-4 sachets per day on an ongoing basis.

    Is it ok to take probiotic supplements every day?

    Probiotic supplements are generally considered very safe to take on a daily basis1; in fact most research recommends daily use. Probiotics are natural supplements and not a medication. They carry no risk of dependency and do not cause the bowel to become ‘lazy’.


    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.

    This is a dietary supplement and is not intended to diagnose, treat, cure or prevent any disease. Dietary supplements should not be used as a substitute for a healthy diet and 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.


    1. Saavedra et al. 2004. Long-term consumption of infant formulas containing live probiotic bacteria: tolerance and safety. The American journal of clinical nutrition. 9:261–7.
    2. Mirghafourvand Mojgan et al (2016), “The Effect of Probiotic Yogurt on Constipation in Pregnant Women: A Randomized Controlled Clinical Trial.” Iranian Red Crescent Medical Journal, Nov; 18(11): e39870 PMC. Web.
    3. Pitkala, K.H et al. (2007), ‘Fermented cereal with specific Bifidobacteria normalizes bowel movements in elderly nursing home residents. A randomized, controlled trial’, Journal of Nutritional Health and Aging, 11(4):305-311.
    4. Eskesen, D. et al. (2015), ‘Effect of the probiotic strain Bifidobacterium animalis subsp. lactis BB-12® on defecation frequency in healthy subjects with low defecation frequency and abnormal discomfort: a randomised, double-blind, placebo-controlled, parallel-group trial’, British Journal of Nutrition, Nov 28: 114(10) :1638–1646
    5. Da Silva Souza, D. et al. (2018, Nov). Randomized, Double-Blind, Placebo-Controlled Parallel Clinical Trial Assessing the Effect of Fructooligosaccharides in Infants with Constipation. J. Nutrients. 2018 Nov; 10(11): 1602. Published online 2018 Nov 1. doi: 10.3390/nu10111602

  • Ingredients

    Ingredients bifidobacteria & fibre supplement fact panel

    • Prebiotic FOS (Fructooligosaccharides)
    • Probiotic cultures: Bifidobacterium lactis BB-12®
    • Fructose, silicon dioxide

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


    • 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
  • Help & Advice

    Talk to our experts

    If you have a specific question or need some advice on which product to choose please email or click on the link below for our contact form

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  • Reviews

    Customer reviews

    • 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 🤍

      Bailey - 23rd May 2021

    • I have been taking these probiotics for a few months now, after a particularly bad flare up of IBS. I have them in a smoothie every morning and sometimes on occasion give them a miss. They just became a part of my daily routine and I without noticing my IBS settling down. I recently ran out of my supply so whilst I waited for them to be delivered I noticed a huge difference in pain, BM frequency, digestion and all of the other symptoms that come with IBS. I honestly never realised how much these probiotics help ease my symptoms and I would now be absolutely lost without them. They may not work for everyone but they are definitely worth a try if you’re all out of options. They were something I stumbled across when I was looking for my solution so definitely worth a try!

      Maddie - 4th October 2020

    • Oh my goodness these are amazing!! Have tried them before but only for a couple of days and stopped as they didn't work. Was very constipated and decided to try them only took one a day after a few days nothing!! But kept persevering and after about 6/7 days I went but just thought that would be it but I am still taking them and am going every single day now sometimes twice which is amazing considering that I only used to go once a week at the most. I have stopped taking laxatives now . If you keep on taking it you will definitely see results but I know for some people the time scale will be different.

      Julia - 25th June 2020

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  • Delivery & Returns

    USA Shipping

    Coronavirus Update

    We ship all USA orders from our warehouse in Hampshire in the UK. Due to the ongoing global pandemic many US, European and Worldwide postal routes are seeing increased transit times. Delivery times provided on this site are therefore a guide and not a guarantee. Express Services largely remain unaffected however these routes are typically subject to local tax and duties at customs.

    USA standard shipping: $4.99

    International postal order - typically deatched and delivered within 5-10 working days.
    Free standard shipping on orders over $100.

    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.

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