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The UK’s No.1 bestselling brand of probiotic supplements^
- Backed by Gold Standard Science Since 2004
- Discover the most researched strains of friendly bacteria
- Most trusted and recommended by UK and Irish consumers
Best selling probiotic supplements
All products
High quality probiotics, backed by credible science
At Optibac Probiotics we specialise entirely in live cultures and have many different supplements for different life stages and individual needs.
We're the UK & Ireland's most recommended brand of friendly bacteria supplements †
So you can feel good about choosing Optibac.
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Backed by science
We only use the most highly researched strains of probiotic bacteria
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Natural ingredients
We prioritise natural ingredients and take care to avoid hidden sugars and other nasties
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Rated 'Excellent'
From over 5,500 independently verified reviews on Trustpilot
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Probiotic experts
With 20 years' experience of creating a specialist range of probiotic supplements
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Targeted supplements
Our range of probiotics is formulated to complement the body’s natural gut bacteria
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Eco-conscious packaging
Including glass jars, compostable pouches and FSC®-certified cartons
Louise Mason
BA(Hons) DipCNM Nutritional Therapist, DipCNM Naturopath, mANP
"When you consider the quality of the strains used, and the billions per capsule, Optibac Probiotics actually offer incredible value for money!"
Sarah Oboh
BSc(Hons) Human Nutrition, Nutritionist
"I love that the range is tailored for different life stages and needs. It takes into account our individuality - which is important."
Dr Sasivimol Ahmed
PhD, PG Dip (Personalised Nutrition), BSc (Food Science)
"Most people don’t know that the research behind the strains is so much more important than a higher billion count per capsule."
Sam Andrews
BSc(Hons) Sport and Exercise Nutrition
"Optibac Probiotics use more natural ingredients and fewer additives than most brands. The gummies are made from fruit purees with no added sugar or flavourings – that’s rare!"
Kerry Beeson
BSc (Nut. Med.) Nutritional Therapist
"The Optibac Probiotics range is home to the most researched strains in the world. It feels good being able to recommend supplements that you genuinely believe in!"
Camilla Gray
DipCNM Nutritional Therapist
"My personal discovery of live cultures started with ‘One Week Flat’ 10 years ago and it’s one I still use and recommend regularly, especially before holidays or festive periods."
We’ve featured in…
We care about the health & happiness of our customers
Caring & Committed
We specialise in probiotics and have a wide range to meet your individual needs. Our supplements are proven to not only reach the gut alive, but to complement the natural microbiome. What's more, we're committed to helping our planet and others, as demonstrated by our support for organisations such as Womankind Worldwide.
More about us
Proud winners of The Queen's Award for Enterprise
We are truly honoured to have been awarded the Queen's Award for Enterprise; the most prestigious awards for business in the UK. These awards celebrate the best of British business and recognise companies who are making an outstanding contribution to enterprise. In 2019 we won in the International Trade category.
Research backed, natural probiotics for every need
At Optibac Probiotics we specialise entirely in live cultures and we understand the importance of using specific strains for your individual needs.
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Lactobacillus acidophilus NCFM®
This is the most researched strain of acidophilus in the world and is shown to help support immune health, digestion, and occasional bloating*. Find it in our high-strength supplements, Every Day EXTRA and Every Day MAX.
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Saccharomyces boulardii
This strain of probiotic yeast has been used for 50 years all over the world for occasional diarrhoea*. It’s very robust and shows strong resistance to heat, humidity and stomach acidity. Find it in our S Boulardii.
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Lactobacillus rhamnosus GG
This is the most researched strain of probiotic bacteria in the world. It has been extensively studied around the world in all age groups for digestive and immune health*, especially in Babies & Children.
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Bacillus coagulans Unique IS-2
One of the most researched strains of Bacillus, trialled in hundreds of children and adults. You can find it in our gut health gummy supplements, Gut Health Gummies and Kids Gummies.
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Lactobacillus rhamnosus GR-1®
This highly studied strain for the intimate flora has been trialled in thousands of women around the world. It can be found in For Women, the UK's No 1 friendly bacteria supplement for the vagina^^.
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Bifidobacterium breve M-16V®
Clinically trialled in over 4,000 infants and young children, including newborns, and shown to support digestion and immune health*. Find this strain in both our Baby Drops and Babies & Children.
