In its “Best probiotic supplements 2026” article, Which? brought together independent nutrition experts to review 25 popular friendly bacteria products. Their rigorous assessment considered ingredient quality, the strength of evidence from human trials, and how well formulations aligned with their intended use. Only products that performed exceptionally across these criteria were awarded Which? Best Buy status.
This recognition reinforces Optibac’s position as the UK's most trusted and recommended friendly bacteria supplements†. It also offers shoppers added reassurance in a category where product quality and supporting evidence can vary widely.
Optibac Every Day also recognised by Which?
Alongside this achievement, Optibac Every Day received a “Worth a Look” endorsement in the same Which? review. This recommendation highlights products that performed well during independent assessment and are considered solid options for people seeking reliable, everyday supplementation. Together, these recognitions underline the strength and credibility of the Optibac dailies range within the live cultures category.
About Every Day EXTRA and Every Day
Optibac Every Day EXTRA is one of our bestsellers - a daily friendly bacteria supplement designed for those seeking a higher-strength option, delivering 20 billion live cultures per capsule from four carefully selected strains, including Lactobacillus acidophilus NCFM®. It is formulated without FOS fibres, comes in a convenient once-daily capsule, and is suitable for long-term use.
Another of our dailies, Every Day is a multi-strain friendly bacteria supplement formulated for daily use, containing six strains that have been extensively studied for more than 20 years - a great place to start if you're new to friendly bacteria.
What does a Which? Best Buy mean?
Which? is the UK’s leading independent consumer organisation, known for its rigorous, unbiased testing. A Best Buy award is given to products that stand out for overall quality and value, based on factors such as formulation, supporting evidence, suitability, labelling transparency, and price. As Which? does not accept advertising or sponsorship, its recommendations are widely trusted.
Recognition from an independent body like Which? helps shoppers feel more confident when choosing supplements. It provides reassurance, builds trust, and makes it easier to compare options in a crowded market.
These latest endorsements from Which? further underline Optibac’s commitment to setting high standards in the friendly bacteria supplements category.
Read about our other award-winning friendly bacteria supplements:
Babies & Children wins NPPA gold again!
