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One Week Flat (For Flat Stomachs)

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One Week Flat (For Flat Stomachs)

1 Week Supply (7 Sachets)
A natural bacteria supplement from OptiBac Probiotics to be taken for 7 consecutive days. Beneficial to those seeking quick reduction in bloating and gas, allowing the stomach to flatten quickly. A high quality, short-term live cultures supplement. Many people have enjoyed the benefits of this supplement shortly before a beach holiday or even a public presentation. 

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'One week flat' 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.

Each sachet: Provides 5 billion live cultures + 0.3g FOS fibres.OptiBac Probiotics 'One week flat'
Lactococcus lactis Rosell-1058

More about 'One week flat'

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.

Background information
Unlike similar foods and supplements containing live cultures, 'One week flat' is free from added sugars and does not contain gluten, and may therefore be suitable for those with bloating. Abdominal or stomach bloating is thought to be associated with food intolerances, constipation, over-eating, PMS or intestinal gas; leaving the abdomen feeling uncomfortable, full and tight. If you have poor digestion, waste materials and the gases they produce can remain in the gut for long periods of time, often at high temperatures and pressures. This causes bloating and stretching of the gut walls beyond their comfortable limits. An imbalance of bacteria in the gut may result in poor digestive health, bloating, production of smelly and uncomfortable gases, and sluggish bowels. This imbalance is known as dysbiosis.

  • For Healthcare professionals - Scientific Research on live cultures and bloating.

Recent research on Probiotics, Prebiotics, and Bloating

A multi-strain probiotic preparation reduces symptoms of irritable bowel syndrome – September 2008 - This double-blind placebo-controlled Clinical trial by Williams E, et al. treated 52 adults with two species of Lactobacillus and two species of Bifidobacteria for a period of 8 weeks. Results showed that the probiotic supplements made considerable reductions in the severity of IBS symptoms. Individuals on probiotics saw a reduction in days with pain, and reported a significant improvement in quality of life and satisfaction with bowel habits.

Lactobacillus acidophilus & body weight and leptin expression in rats - February 2008 - This study by Sousa et al at the University of Georgia, Athens, reported that rats administered with the probiotic Lactobacillus acidophilus showed weight loss in comparison to rats that were not given the probiotics. Injecting acidophilus supernatant into the Central Nervous Systems of the rats led to greater expression of leptin, a protein hormone that decreases the appetite and quickens the metabolism.

To read the entire study, see

Probiotics ease stress-related gut problems - January 2008 - Leading probiotic company, Lallemand led a double-blind study that randomly assigned either probiotics or placebos to 75 volunteers between the ages of 18 and 60. Participants given the probiotics Lactobacillus acidophilus Rosell-52 and Bifidobacterium longum Rosell-175 reported a significant reduction in abdominal pain and nausea or vomiting compared to participants given placebos. Authors of the study at Lallemand commented that this probiotic supplement could work on the intestinal microbiota, the epithelial barrier, and the immune system in order to improve problems in the gut which were induced by stress.
Source: Nutrition Research (Elsevier) Volume 28, Issue 1, January 2008, Pages 1-5 "Probiotic food supplement reduces stress-induced gastrointestinal symptoms in volunteers: a double-blind, placebo-controlled, randomized trial" Authors: L. Diop, S. Guillou, H. Durand

Prebiotics help to avoid weight gain in adolescents - October 2007 - A study published in the Journal of Pediatrics and conducted at the Baylor College of Medicine stated that especially during puberty, an imbalance between energy intake and expenditure can cause weight gain and possible obesity. The study, involving 97 healthy adolescents, gave participants either inulin/oligofructose (FOS) or a placebo for the period of a year. Results showed less increase in BMI amongst the group given prebiotics, with considerably lower body weight and body fat mass in these participants compared to the controls.
Source – “Effect of Prebiotic Supplementation and Calcium intake on Body Mass Index.” Journal of Pediatrics, September 2007, Volume 151, Pages 293-298.

Clinical Research on Probiotics, Prebiotics and Bloating

Marteau, P. & Boutron-Ruault, M. C. (2002) Nutritional Advantages of Probiotics and Prebiotics. British Journal of Nutrition. Vol. 87 Suppl. 2 pp. S153 – S157

Paineau, D. (2007) Regular consumption of short-chain fructooligosaccharides improves digestive comfort with minor functional bowel disorders. Br. J. Nutr. Aug 13:1-8 [Epub ahead of print]

Colecchia, A. (2006) Effect of a symbiotic preparation on the clinical manifestations of irritable bowel syndrome, constipation-variant. Minerva Gastroenterol. Dietol. 2006. 52:349-358

Tokunaga, T. (1993) Effects of fructooligosachharides (FOS) intake on the intestinal microflora and defecation in healthy volunteers. Bifidus. (6) 143-150.

Houghton, L. A. & Whorwell, P. J. (2005) Towards a better understanding of abdominal bloating and distension in functional gastrointestinal disorders. Neurogastroenterology & Motility. Vol. 17 pp. 500 – 511

Zar, S, et al. (2002) Review Article: bloating in functional bowel disorders. Alimentary Pharmacology and Therapeutics. Vol. 16 pp. 1867 - 1876

Kumar, D. et al. (2005) Beneficial effects of probiotics and prebiotics on human health; Pharmazie Vol. 60 (3) pp.163 – 171

Gibson, G. R. et al (1995) Selective stimulation of bifidobacteria in the human colon by oligofructose and inulin. Gastroenterology. Apr;108(4):975-82.

Wallace, T.D. et al. (2003) Interactions of lactic acid bacteria with human intestinal epithelial cells: effects on cytokine production. Journal of Food Protection, 66, 3; 446-472.



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

  • Each sachet guarantees 5 billion micro-organisms + 0.3g FOS fibres.


As a natural food supplement 'One week flat' can be given to adults and children from 4 years old & up, with the following recommendations: Take one sachet daily with breakfast for a 7 day course, or as professionally directed.

We highly recommend you take 'One week flat' for 7 consecutive days. Most customers take this course once a month, but it can taken as often as desired. For more information see our FAQ: How often should I take OptiBac 'One week flat'?

For best results:

  • Pour an inch of water into a tall glass, leaving plenty of room for swirling.
  • Shake the sachet well before gently sprinkling in the powder.
  • Leave powder to dissolve naturally. 
  • Vigorously swirl the water around in the glass.
  • Drink, wait, and enjoy the benefits!

Live cultures are not recommended for those with serious medical conditions eg. those who are severely immunosuppressed, have pancreatitis, are in the ICU, have melaena, have a central venous catheter, infants with short bowel syndrome, or to patients with open wounds following major surgery; unless under a doctor's care. Furthermore, pregnant or breastfeeding women should consult their doctor before taking Saccharomyces boulardii, 'For travelling abroad', or natural plant extracts as in 'For daily immunity'.



No GlutenNo Gluten
Suitable during PregnancySuitable during Pregnancy


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