The UK's No. 1 bestselling brand of friendly bacteria supplements^

Probiotic supplement box and jar on a counter with a plant, offering escalating discounts on subscriptions: 15% off 1st and 2nd orders, 25% off thereafter.

Subscribe & save up to 25%

Save time, effort & up to 25% when you subscribe
Plus free UK delivery every time
Consistent routine. Trusted science. Better value
From the UK & Ireland's most trusted & recommended brand

Shop the rangeShop the rangeTalk to a qualified expertTalk to a qualified expert

Our bestselling friendly bacteria

Containing the most researched strains of friendly bacteria, tailored for every life stage

Shop all friendly bacteria

Smiling woman in a gray sweater holds a bottle labeled "Optibac" while sitting on a couch, with a plant in the background.

10% off when you join the Optibac family

Sign up and check your inbox for 10% off your first order, plus gut health insights and personalised offers.