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The friendly bacteria specialists
- Proud to be the UK's most recommended brand
- Widest range - there's an Optibac for everyone
- All proven to complement the natural gut bacteria
Best selling friendly bacteria supplements
All products
High quality live cultures, backed by credible science
At Optibac 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 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 friendly 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 4,500 independently verified reviews on Trustpilot
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Friendly bacteria experts
We have specialised in creating friendly bacteria supplements for over 20 years.
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Targeted supplements
Our specialist range is designed to target individual needs and life stages
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Eco-conscious packaging
Including glass jars, compostable pouches and FSC®-certified cartons
Louise Mason
BA (Hons) Dip CNM Nutritional Therapist, Dip CNM Naturopath, mANP
"When you consider the quality of the strains used, and the billions per capsule, Optibac actually offers 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 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 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 friendly bacteria 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, and have raised £1.5 million to date for charitable 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.
Travel Abroad is back!
Our beloved travel supplement returns just in time for all your adventures this year. We’d like to give a very warm welcome back to our customer favourite, Optibac Travel Abroad! We know lots of you have been waiting for this supplement to return, so we’re delighted to announce that it’s finally here.
Shop Travel AbroadResearch backed, natural live cultures for every need
At Optibac 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 has undergone numerous large scale clinical trials. Find it in Every Day EXTRA and our most premium 'product' Every Day MAX.
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Saccharomyces boulardii
This strain of friendly yeast has been used for 50 years all over the world. 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 friendly bacteria in the world. It has been scientifically studied across different global populations and demographics, and especially in Babies & Children.
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Bifidobacterium lactis BB-12®
Is thought to be the most researched strain of the entire family of Bifidobacteria! Extensively trialled in various life stages, including in infants, pregnant women and older people, it’s in Bifido & Fibre.
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Lactobacillus paracasei CASEI 431®
This high quality, incredibly well researched strain has been widely studied in thousands of people and can be found in our Immune Support.
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Bifidobacterium breve M-16V®
Clinically trialled in over 4,000 infants and young children, including newborns. Find this strain in both our Baby Drops and Babies & Children.
