Bifido & Fibre

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 Bifido & Fibre is a high quality supplement combining 25 billion live cultures of the scientifically proven Bifidobacterium lactis BB-12. Also with 4g of FOS fibres added to increase your natural gut bacteria.

Purchase type

FREE UK delivery on orders over £40.

UK express - Monday to Friday delivery.

See our Delivery & Returns for more information.

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  • Vegan


  • No dairy

    No dairy

  • Gluten free

    Gluten free

  • Soy free

    Soy free

  • During pregnancy

    During pregnancy

Key benefits

Bifidobacterium friendly bacteria with FOS fibres

Great for anyone looking to buy an expertly formulated friendly bacteria supplement with FOS for natural fibre.

  • Extensively researched supplement Contains the renowned strain Bifidobacterium lactis BB-12®, researched in thousands of people in gold standard clinical trials, combined with 4g of Fructooligosaccharide (FOS) fibres to increase gut bacteria
  • Scientifically proven formulation We've carefully chosen this combination of friendly bacteria and FOS because they've been shown to survive stomach acidity and reach the gut alive, complementing the natural gut bacteria
  • High in fibre, providing suggested daily intake The International Scientific Association of Probiotics & Prebiotics (ISAPP) suggests a minimum daily intake of 3-5g of fermentable fibres such as FOS
  • Easy to use, flavourless sachets These powder FOS and friendly bacteria supplements 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
  • From the UK's most recommended brand Optibac is the brand of friendly bacteria supplements most recommended by UK consumers


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.

Optibac Probiotics strains

  • Bifidobacterium lactis BB-12®

Added nutrients

  • FOS fibres
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.

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

Why choose us?

We are the UK's most trusted & recommended brand of friendly bacteria supplements as determined in an independent survey of 1000 people 

We use the most researched strains of friendly bacteria in the world with each supplement designed to target individual needs and life stages.

  • How to use

  • Ingredients

  • Leave a review

  • Delivery & returns

  • How to use

    Recommended use

    Food supplement suitable for adults and children (from 12 months 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 and out of direct sunlight.


    *Live cultures 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


    Fructooligosaccharide fibres (FOS 4g); standardised culture (fructose, Bifidobacterium lactis BB-12®).

    Each sachet guarantees 25 billion live cultures + 4g FOS fibres.


    • Vegetarian
    • Vegan
    • Gluten free
    • No dairy
    • Flavourless
    • Suitable in pregnancy
    • Suitable during breastfeeding
    • Yeast free
    • GMO free
    • Free from artificial flavourings, colourings and preservatives
    • No chemicals or parabens
    • Not suitable for FODMAP diets
    Format Sachet
    No. Live Cultures 25 billion
    Added Ingredients FOS Fibres
    Recommended Use 1 sachet daily
    Age Range Adult
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  • Delivery & returns

    UK Delivery

    Free UK Delivery over £40 
    Free standard UK delivery is automatically applied at the checkout when you spend £40.

    Standard 2nd class: £2.50
    Allow 4-10 working days (Monday - Friday) for delivery 

    1st class: £3.95
    Allow 1-3 working days (Monday - Friday) for delivery 

    Express Next Day, order before 2pm (Tracked): £6.95 
    Allow 1-2 working day delivery to most of the UK*. Orders placed on Friday will be delivered on Monday (next working day). Requires signature.

    Shipments will be dispatched via DHL or FedEx, the service will be selected depending on the delivery location.

    *Express delivery may exclude the Channel Islands, Herm Island, Isle of Man, Isle of Wight, Northern Irish postcodes BT18 & upwards, Sark, Scottish borders and offshore and a small number of remote mainland destinations as determined by our delivery courier. 

    Good to know

    • We'll send you an email to confirm once your parcel has been dispatched.
    • For delivery queries, please call us on +44 (0)1264 339 770 or email
    • Orders placed before 2pm are typically dispatched on the same working day.
    • Delivery within the UK and Northern Ireland has a fixed price, regardless of the size and weight of your order. 
    • Delivery times are estimates and not guaranteed unless otherwise stated.

    International Delivery

    We offer an excellent worldwide delivery service. For more details, 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

The product is flavourless and formulated to be bland and quite pleasant-tasting to make it palatable. If you do not like the flavourless taste then you can simply sprinkle the powder into yoghurt, cereal or other cold foods. Do not put the powder into any food or liquid that is warm as this may damage the supplement. You should also avoid adding the powder to any fruit juice, as citric acid may also damage the supplement.

In 2017 there was a high-profile BBC documentary that generated a lot of interest in the potential for FOS fibres to help with sleep. Whilst the research featured in the programme was very interesting it was a preliminary rat study, and we base our recommendations on the results of gold standard human clinical trials. If you'd like to try Optibac Probiotics Bifido & Fibre note that whilst we usually recommend that our probiotics are taken with breakfast, this supplement is fine to take an hour or so before bed, as the programme suggested.

Optibac Bifido & Fibre can be taken with or without food, on an occasional 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, spread over the day.

Friendly bacteria supplements are natural - they are not medications and are considered safe to take on a daily basis with very few exceptions1. Live cultures carry no risk of dependency and do not cause the bowel to become ‘lazy’. 

Read references

Optibac Bifido & Fibre is a natural supplement, safe for use by everyone, including children, pregnant women, and older people1,2,3. It contains 25 billion CFU of the friendly bacteria strain Bifidobacterium lactis BB-12®, proven to reach the gut alive4 and thought to be the most highly researched strain in the entire Bifidobacterium family5! In Bifido & Fibre, this strain is offered in a unique combination with 4g of fructo-oligosaccharides (FOS), a natural source of fibre.

Read references

We always recommend that you add the powder in our sachets to about an inch of water and swirl the powder in the glass - using a spoon or fork to stir doesn’t seem to be as effective. Continue to swirl until the powder has dissolved and then you may add more water if you wish. It’s best not to add the powder to the glass first and then add the liquid, as it may clump. Alternatively, you can simply sprinkle the powder into yoghurt, cereal or other cold foods. Do not put the powder into any food or liquid that is warm, or add to fruit juice, as this may damage the viability of the friendly bacteria.

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