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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 5,691 reviews)
Scientifically proven to reach the gut
& complement the natural microbiome
FREE UK DELIVERY on orders over £40
and 14-day hassle-free returns
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How can we help?
Below you'll find a list of frequently asked questions about Optibac live cultures and FOS fibres. If you can't find what you're looking for, or if you'd like us to add a question, please get in touch.
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Usage
Read about the best time of day to take our supplements and how to choose the best option for you.
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Suitability
Find out which of our supplements is best with certain allergies, an intolerance or during particular life stages.
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Added Nutrients
Are you curious about how vitamins such as vitamin C work? Read more about added nutrients.
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Live Cultures
Find our what live cultures are and how they could benefit you.
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Orders & Delivery
Everything you need to know about ordering Optibac supplements and delivery charges, timings and destinations.
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Can’t find what you need?
Contact our team of experts for advice or questions regarding the Optibac range of supplements.