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OptiBac Probiotics One Week Flat - 7 Sachets

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6 reviews

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Product code: 1253


One Week Flat` (formerly known as `For a flat stomach`) is a food supplement containing natural bacteria (live cultures), in powdered sachets to be taken daily as a one-week course. This can be taken once a month, or as frequently as desired.

Lactobacillus acidophilus Rosell-52:

Acidophilus is a natural resident of the intestinal microflora; this strain of acidophilus from OptiBac Probiotics has been shown to survive gastric acidity and biliary salts, and to reach the intestines without damage.

Bifidobacterium bifidum Rosell-71:

In-vitro tests suggest that this strain flourishes well with Fructooligosaccharides.

Lactobacillus casei Rosell-215

Is of an extensively studied species naturally residing in the intestinal flora; this strain from OptiBac Probiotics has been researched in its ability to resist gastric acidity and bile salts in order to reach your small and large intestines alive.

Lactococcus lactis Rosell-1058

Is extracted from the kefir culture, and has been scientifically proven to reach the gut alive.

Fructooligosaccharide fibres (FOS)

Predominantly settle in the large intestine where they may act as a food source to stimulate the growth of your body`s natural bacteria.

This 7 day course is ideal for those looking for a short term, high quality natural bacteria supplement.


7 Sachets: Each containing 5 billion probiotic microorganisms + 0.3g prebiotic fibres.


Stabiliser: Maltodextrin; Fructooligosaccharides (FOS); live cultures: (Lactococcus lactis Rosell-1058, Lactobacillus casei Rosell-215, Lactobacillus acidophilus Rosell-52 and Bifidobacterium bifidum Rosell-71).

5 billion live micro-organisms guaranteed per sachet.


Adults: Take one sachet daily with breakfast for a 7 day course or as professionally directed.

For best results when mixing:

  • Pour an inch of cold water into a tall glass, shake sachet and gently sprinkle in the powder;
  • Leave powder to settle on the surface of the water - it will dissolve naturally;
  • Swirl the water around in the glass;
  • If necessary, mix with a teaspoon to disperse any remaining powder.


  • Store in a cool dry place.
  • No refrigeration necessary.
  • Keep out of reach and sight of children.
  • Suitable during pregnancy

Note: Most customers find the benefits of On Week Flat last for 2 to 3 weeks and therefore take a course of this product once a month. You can either take no probiotics during the weeks in between, or consider taking OptiBac Probiotics ‘For daily wellbeing’ or ‘For daily wellbeing EXTRA Strength’ during this time.


Below are reviews of OptiBac Probiotics One Week Flat - 7 Sachets by bodykind customers. If you have tried this product we'd love to hear what you think so please leave a review.

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Posted by
excellent and fast service
Posted by
It worked fairly well, I wasn't expecting a completely flat tummy, but it didn't work amazingly well for me - in that I wanted it to help control my bloating. I've tried most of the Optibac range and this one seemed to work better. Probiotics seem like a minefield to find the right one!
Posted by
This has been very successful in treating a long term problem of trapped wind. Having been triggered in the past by any wheat products, I now find that I can widen my range of possible foods. The first positive effects were apparent after 24 hours and the improvement was still there at the end of the month. For me this has been a real life changer.
Posted by
It does work after 4th day I noticed the results. No bloating. I then stopped after 7 days and took optibac extra strength but became very bloated and constipated. Back on the optibac 7 day again.
Posted by
I purchased these after being poorly, I did everything to try and settle my stomach. This is a wonder product! Worked almost instantly, can't recommend highly enough.
Posted by
i took the first sachet yesterday, i slept really well last night woke up feeling awake and refreshed not sure its connected but i normally awake feeling like i need more sleep. anyways my tummy is nice and flat today and i feel just great this came free for me with the daily wellbeing but even if they didnt i would advise anyone to give them a go super quick result. :-)

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