30 capsules |1 month's supply

Dr Sasivimol Ahmed PhD, PG Dip (Personalised Nutrition), BSc (Food Science)
I love this supplement because it contains the UK's most researched friendly bacteria strains for pregnancy, post-birth and breastfeeding.
Dr Sasivimol Ahmed
Dr Sasivimol Ahmed PhD, PG Dip (Personalised Nutrition), BSc (Food Science)

Who is it for?

Unlike other friendly bacteria supplements on the market, Pregnancy contains 3 high quality strains which are extensively researched in and carefully selected for pregnancy from conception through to birth, as well as for post-birth and breastfeeding.

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  • Vegan


  • No dairy

    No dairy

  • Gluten free

    Gluten free

  • During pregnancy

    During pregnancy

  • During breastfeeding

    During breastfeeding

  • Artificial colour free

    Artificial colour free

Key benefits

Friendly bacteria suitable for pregnancy

A prenatal supplement for pregnant women from conception through to birth. Also suitable and researched during breastfeeding and the 6 months+ post birth.

  • Friendly bacteria in pregnancy Contains well-researched friendly bacteria strains trialled specifically in women during pregnancy, while breastfeeding, and post-birth.
  • Scientifically proven All three strains proven to survive to reach the gut alive - L. rhamnosus HN001 and L. acidophilus La-14® also reach the vaginal tract
  • For the gut and vagina These strains have been shown to complement the bacteria natural to the gut and vaginal areas
  • With FOS fibres A synbiotic supplement containing 12 billion live bacterial cultures in combination with 30mg FOS fibres
  • Specific strain action L. rhamnosus HN001 has been shown to stimulate immunological responses1
  • A more natural option These live cultures for pregnancy are vegan, gluten free for those with coeliac disease, and made with absolutely no artificial flavourings or colourings
  • Easy and convenient Daily pregnancy friendly bacteria in an easy-to-swallow capsule, with no need for refrigeration
  • Trusted brand Optibac is the UK’s most trusted & recommended brand of friendly bacteria supplements*



1. Sheih Y et al. (2001). Systemic immunity-enhancing effects in healthy subjects following dietary consumption of the lactic acid bacterium Lactobacillus rhamnosus HN001. Journal of the American College of Nutrition, 20 (2): 149-156.

Optibac Probiotics strains

  • Lactobacillus rhamnosus HN001
  • Lactobacillus acidophilus La-14®
  • Bifidobacterium lactis HN019

Added nutrients

  • FOS fibres
See full ingredients list

General digestive


Complements gut bacteria

Customer reviews

5/5 (22 reviews)
  • I started taking these midway through my pregnancy and have continued - baby is 4 months now. In my previous pregnancies I struggled. I did get the bifido and fibre supplement to use alongside these and that helped with that side of things.

    Anna Hughes- 7th March 2022

  • I really suffered in my first pregnancy with bloating and nausea when taking other tablets. Since taking these with my second pregnancy I have noticed a considerable difference. Would highly recommend.

    Kirsty Roberts- 20th October 2021

  • I am in my third trimester and was really struggling with indigestion, bloating and gas. I was recommended these by a friend and I am no longer feeling uncomfortable. I have also noticed energy levels have increased as I was starting to get lethargic. I also love the fact that these probiotics are aiding my babies immune system too, especially during the uncertainty of the pandemic we are in.

    Harriet Gray- 10th September 2021

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Help & advice

Speak to our team of experts (nutritionists, microbiologists and nutritional therapists) any time for free advice, with absolutely no obligation to buy.

Camilla Gray
Camilla Gray DipCNM Nutritional Therapist

Why choose us?

We are the UK's most trusted & recommended brand of friendly bacteria supplements.

† As determined in an independent survey of 1000 British women.

  • How to use

  • Ingredients

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  • Delivery & returns

  • How to use

    Recommended use

    Food supplement suitable for pregnant women from conception through to birth and for breastfeeding and non-breastfeeding women post birth with the following recommendations:

    • Take 1 capsule daily, preferably with breakfast.
    • For those unable to swallow capsules, open and mix contents with a cool drink / food.
    • Do not exceed recommended daily dosage.
    • May be taken on an ongoing basis or as professionally directed.
    • For best results use daily.

    Supporting Information

    Morning sickness and/or nausea is a common symptom in pregnancy and therefore pregnant women often prefer taking supplements in the form of capsules. To make taking Pregnancy capsules as easy as possible, we recommend tilting the head forward to swallow the capsule. Details below:

    • When swallowing tablets, it’s common to put the tablet in your mouth, drink some water and tilt your head back to swallow it (i.e. look up before swallowing). Doing this uses the weight of the tablet to move it to the back of the throat and makes it easier to swallow successfully.
    • With a capsule, however, this won’t work because of the air inside it. Instead, while the capsule and water are in the mouth, we recommend to look down before swallowing. This will buoy the capsule to the top of the water (back of the throat) and make it easier to swallow, particularly if morning sickness and/or nausea are a problem for the individual.

    Storage instructions

    • For best results, do not remove desiccant sachet from the glass jar and close lid firmly after each use.
    • Store in a cool, dry place below 25°C and out of direct sunlight. For maximum potency, can be refrigerated after opening.


    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, 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


    Live cultures: Lactobacillus rhamnosus HN001, Lactobacillus acidophilus La-14®, Bifidobacterium lactis HN019; corn starch; vegetarian capsule: hydroxypropyl methylcellulose; Fructooligosaccharides (FOS 30mg); anti-caking agent: vegetable magnesium stearate

    *Nutrient Reference Value

    Each capsule contains 12 billion live cultures guaranteed until the date of expiry.


    • Vegan
    • No dairy
    • Gluten free
    • Suitable in pregnancy
    • Suitable for breastfeeding
    • Soy free
    • Yeast free
    • GMO free
    • Free from artificial flavourings, colourings and preservatives
    • No chemicals or parabens

    Following the taxonomic updates advised by a global team of scientists and published in April 2020, a reclassification has been proposed for the Lactobacillus rhamnosus species. The L. rhamnosus strain in Pregnancy may therefore now also be known as Lacticaseibacillus rhamnosus HN001.

    Format Capsule
    No. Live Cultures 12 billion
    Added Ingredients FOS Fibres
    Recommended Use 1 capsule 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 (Tracked): £6.95 (Dispatching Friday 30th December)
    Order before 2pm for 1-2 working day delivery to most of the UK*. Orders placed on Friday will be delivered on Monday (next working day). Requires signature.
    Please be aware of Christmas Bank holidays.

    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 Kerry Beeson BSc (Nut. Med.) Nutritional Therapist

Many brands of live cultures for pregnancy use the same strains in all of their products, just adding other ingredients to differentiate how they should be used. Optibac Pregnancy friendly bacteria supplement is formulated just for pregnancy, and contains special live cultures strains researched in women from conception, throughout pregnancy and early motherhood(1-4). It’s also fine to take alongside your prenatal vitamin and mineral supplements.

(1) Slykerman R et al. (2017). Effect of Lactobacillus rhamnosus HN001 in pregnancy on postpartum symptoms of depression and anxiety. EBioMedicine, 24, 159-165.(2). Prescott SL et al. (2008). Supplementation with Lactobacillus rhamnosus or Bifidobacterium lactis probiotics in pregnancy increases cord blood IFNy and breast milk transforming growth factor B and immunoglobin A detection. Clinical and experimental Allergy,38(10):1606- 1614.(3)Dekker J et al. (2009). Safety aspects of probiotic bacterial strains Lactobacillus rhamnosus HN001 and B. lactis HN019 in human infants aged 0-2. International Dairy Journal,149-154 (4)Wickens K et al. (2017). Early pregnancy probiotic supplementation with Lactobacillus rhamnosus HN001 may reduce the prevalence of gestational diabetes mellitus: a randomised controlled trial. British Journal of Nutrition, 117, 804-813.
Read More

 It’s natural to be concerned about taking live cultures supplements when pregnant or breastfeeding, but Optibac Pregnancy has been specifically formulated for use at this special time. It contains friendly bacteria strains which have been clinically trialled in women during pregnancy and early motherhood and shown to be safe (1).

(1) Dekker J et al. (2009). Safety aspects of probiotic bacterial strains Lactobacillus rhamnosus HN001 and Bifidobacterium animalis subs. lactis HN019 in human infants aged 0-2 International Dairy Journal, 149-154.
Read More

FOS stands for Fructo-oligosaccharides, which are a type of non-digestible carbohydrate. FOS fibres are often added to live cultures supplements such as Optibac Pregnancy as they can be fermented by good bacteria in the gut, giving your little friendly bacteria pals the best start!

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