One Week Flat - 7 Sachets by OPTIBAC PROBIOTICS from The British Vault. Live cultures food supplement Maintain Bowel Health & Support A Lighter Feel For A Flat Stomach Contains 5 Bn Live Per Capsule Take 1 Sachet Once A Day With Breakfast For 1 Week Optibac One Week Flat has been created especially for those wishing to take an easy, short-term course of friendly bacteria. This supplement contains 4 probiotic strains, scientifically proven to reach the gut alive and complement your body’s natural gut bacteria. Chosen for a US larder that wants the original UK pack — not a US-shelf substitute.
In the larder
- Winners of the King's Award for Enterprise
The pack
EASY-TO-TAKE - A flavourless, 7-day course of friendly bacteria in easy-to-take daily sachets, an ideal way to try friendly bacteria for the first time. This friendly bacteria supplement contains strains that are scientifically proven to survive to reach the gut alive.
STRAINS - A multi-strain digestive supplement containing 4 different friendly bacteria strains from the Lactobacillus, Bifidobacterium and Lactococcus genera, combined with FOS (Fructooligosaccharides) fibres, designed to complement the natural gut bacteria.
TARGETED STRAINS - Contains the L. acidophilus/helveticus Rosell-52 strain, shown to produce digestive enzymes including lactase & α-glucosidase, involved in the breakdown of lactose in milk and starch respectively.
GLUTEN-FREE - Free from gluten and yeast, and so may be suitable for those with bloating.
The maker
Optibac specialises entirely in friendly bacteria and is proud to be the UK & Ireland’s most trusted and recommended brand of probiotic supplements†, dedicating 20 years to expertly formulating its range, backed by credible science. Optibac’s award-winning supplements target individual health needs, including digestive, immune, and intimate support, empowering people to feel their best. †See website T&Cs for survey details, 1,000 people, August 2025.
Product information
- FSC - FSC® Mix, Packaging, FSC® C127735
Ingredients
Maltodextrin (Natural Source), Fructooligosaccharides (FOS fibres 0.3g), Live Cultures: Bifidobacterium Bifidum Rosell-71, Lactobacillus Paracasei Rosell-215, Lactococcus Lactis Rosell-1058 and Lactobacillus Acidophilus/Helveticus Rosell-52.
Allergens
Cereals Containing Gluten
Directions for use
Recommended use
Take 1 sachet daily for 7 consecutive days, preferably with breakfast.
Shake sachet, gradually sprinkle contents into a glass of water and vigorously swirl to dissolve fully.
Can be taken occasionally (e.g. monthly), or on an ongoing basis. Also available in 28 sachets.
Safety warnings
Suitable from 4 years+. Do not exceed recommended daily dosage. Food supplements should not be used as a substitute for a varied and balanced diet and a healthy lifestyle. Those with serious medical conditions should consult a doctor before use.
Keep out of reach of children.
From The British Vault
The British Vault lists the UK-formulated health and beauty pack, made to British and EU cosmetics rules, for shoppers who want that original version.
How we ship
We source in the UK and ship to the United States. This listing is from The British Vault.
FAQ
Is this the UK version? Yes. This is the authentic UK health and beauty product from The British Vault — the British-market pack, not a US-shelf substitute.
Do you ship to the United States? Yes. The British Vault ships to the United States from the UK.
Returns & order problems
Returns & order problems
Problems with your order? Contact us within 48 hours of delivery with photos. Full details are in our refund policy.
