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Not sure which supplement is right for you? Book a free, 15 minute telephone call with one of our nutritional experts.
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The UK's No. 1 bestselling brand
of friendly bacteria supplements^
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Rated 'Excellent' on Trustpilot
4.8 stars (based on 7,334 reviews)
Scientifically proven to reach the gut
& complement the natural microbiome
FREE UK DELIVERY on orders over £10
and 14-day hassle-free returns
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Getting started
More and more people are getting why the gut microbiome is important and why friendly bacteria matters so much. The hard part? Getting started.
With so many supplements to choose from, it can feel overwhelming trying to find the right one. The good news is we’re here to take that stress away with the UK's most recommended range†.
Find your perfect Optibac
Watch our resident Nutritional Therapist, Camilla explain how to find the best friendly bacteria for you and your family in less than 2 minutes.
Most popular for new customers
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Every Day – our No.1 way to start your day
New to friendly bacteria? This is a great choice to get you going. A complete multi-strain formula with live cultures and FOS fibres – great value backed by 20 years of research.
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Kids Gummies - the only children's gummies with...
…friendly bacteria extensively researched in kids, PLUS no hidden nasties, PLUS plastic-free packaging. The easiest, tastiest way to supplement your children for gut and immune health, every day◆.
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For Women – the world’s most researched live cultures for the vagina
Specialist formula with strains trialled for 40 years in thousands of women worldwide and shown to reach the vaginal tract within days. Loved by women at every life stage.
Not sure which one? We'll help you choose
Get your friendly bacteria right, first time with free expert guidance from our experienced Nutritional Therapists. Personalised advice that's quick and clear.
Got a quick question?
Get answers fast from a real, qualified expert on live chat. Simply click the orange button to start a conversation.
Want to dive deeper?
Book a free 15-minute phone consultation with one of our Nutritional Therapists to find the right supplement for you.
Get personalised adviceWhat one customer said about their free 15 minute consultation with a qualified Nutritional Therapist and gut health expert:
'Incredible customer service and advice ⭐⭐⭐⭐⭐ - I expected a one line answer to my question and was astonished by the extremely detailed response from a company who clearly care about their customers' - Ann
There's an Optibac for everyone
From digestive supplements to daily immunity, there's something for everyone. Explore our wide range of friendly bacteria, expertly formulated for individual needs at every age and life stage.
Discover the range