Subscribe & Save 10%
Choose your favourite friendly bacteria supplement(s) and tell us how often you want us to deliver. We'll take care of the rest.
28 sachets |4 weeks' supply
My personal discovery of live cultures started with ‘One Week Flat’ 10 years ago and it’s one I still use and recommend regularly, especially before holidays or festive periods.
Optibac Probiotics One Week Flat is an easy seven-day course of probiotics and prebiotics, formulated to support digestive health, especially occasional bloating. Contains four high-quality probiotic strains which complement the natural gut bacteria.
Free standard shipping on orders over $100.
To compare our supplements for daily use scroll down
One Week Flat can be taken occasionally for 7 consecutive days once a month or on an ongoing basis.
This product is a total game changer. I’ve tried all the opti bac products but this one seemed to agree with me the most and I now take these daily. The sachets make my bowels regular, which is something I’ve struggled with for years. The opti bac team have been great with their customer care and have been committed to helping me find a product that works for me. Thank you!
This is such a fantastic product to have in the cupboard for that time of the month bloating! I've suffered from bloating and flatulence in the week leading up to my period since I was in my teens. A friend of mine recently recommended 'One week flat', and it's really helped do just that. What a relief... thank you OptiBac Probiotics!
I gave birth to my 2nd child a little over two months ago and I’ve always had a little podgy stomach since I can remember. I have pcos which makes loosing weight a bit harder. I only lost half a stone since having my daughter, im now a size 10-12, 10 1/2 stone, I’m only 23 this year and have been doing exercises and eating more home made meals but I still feel so fat. I feel like it’s all mainly bloat though so I tried these and have been having two a day for the past wk to kick start it, maybe that’s why I didn’t see any different but I don’t think my stomach is any different. I’m going to buy one more box and try it one a day as it says as my body is quite arrogant and it’s hard to loose weight maybe one wk just isn’t enough, I’ve tried everything I really thought these would work and was really hoping they would.
Natural dietary supplement suitable for adults and children (from 4 years onwards) with the following recommendations:
We highly recommend you take One Week Flat for 7 consecutive days. Many consumers like to take this course once a month. However, it can be taken on an ongoing basis or as desired.
Probiotics are not recommended for those with serious medical conditions e.g. those who are severely immunosuppressed, have pancreatitis, are in the ICU, have melaena, have a central venous catheter, infants with short bowel syndrome, or patients with open wounds following major surgery; unless under a doctor's care. Keep out of reach of children.
Gut health supplements are not intended to prevent, treat or diagnose any medical conditions. If taking probiotic supplements for gut health, note that these should not be used as a substitute for a varied and balanced diet and a healthy lifestyle. If you are taking any medications or have a serious medical condition, consult a doctor before use. Optibac supplements will not cause dependency and may be used on an ongoing basis.
1. Kocian J. (1996) ‘Further Possibilities in the Treatment of Lactose Intolerance: Lactobacilli’ Prakticky Lekar (General Practitioner). Vol. 74. pp. 212 – 214
2. Rampengan et al., (2010), ‘Comparison of efficacies between live and killed probiotics in children with lactose malabsorption’. Southeast Asian Journal of Tropical Medicine and Public Health 41: 474-481
3. Oak SJ, Jha R. The effects of probiotics in lactose intolerance: A systematic review. Crit Rev Food Sci Nutr. 2019;59(11):1675-1683. doi: 10.1080/10408398.2018.1425977. Epub 2018 Feb 9. PMID: 29425071.
4. D. H. Juers, B. W. Matthews and R. E. Huber, “LacZ β-galactosidase: Structure and function of an enzyme of historical and molecular biological importance,” Protein Science, vol. 21, no. 12, pp. 1792-1807, 2012.
5. Likotrafiti E, Rhoades J. Probiotics, Prebiotics, and Synbiotics. Science Direct. https://www.sciencedirect.com/topics/food-science/probiotic-bacteria. Published 2016. Accessed September 30, 2020.
Prebiotic FOS (Fructooligosaccharides 0.3g); Probiotic blend: Bifidobacterium bifidum Rosell-71, Lactobacillus casei Rosell-215, Lactococcus lactis Rosell-1058 and Lactobacillus acidophilus/helveticus Rosell-52; maltodextrin
Each sachet guarantees 5 billion CFU + 0.3g FOS prebiotics.
Following the taxonomic updates by a global team of scientists and published in April 2020, a reclassification has been advised for the L. casei species. The casei strain in the Optibac Probiotics One Week Flat product is now also known as Lacticaseibacillus casei Rosell-215.
|Added Ingredients||FOS Fibres|
|Recommended Use||1 sachet daily|
USA standard shipping: $4.99
International postal order - typically deatched and delivered within 5-10 working days.
Free standard shipping on orders over $100.
We use DHL and orders are typically dispatched and delivered within 2-5 working days.
For more details regarding international orders, currency conversion and applicable tax for orders outside the USA, please take a look at our delivery FAQ.
If you have changed your mind, you can return goods, at your cost, unopened within 14 days for refund or exchange, this does not affect your statutory rights.
All questions answered by probiotic experts Dr Kate Stephens PhD (Food and Microbial Sciences) BSc(Hons) Medical Biology and Kerry Beeson BSc (Nut. Med.) Nutritional Therapist
Many probiotic strains, including those found in Optibac Probiotics One Week Flat, produce digestive enzymes. These digestive enzymes are known to help break down problematic foods, preventing excessive fermentation in the gut that can cause bloating(1)*. The good bacteria in the supplement also help to discourage the growth of undesirable bacteria(2)* which tend to product a lot of gases. For these reasons, many people find that One Week Flat can be helpful for occasional bloating*.
(1). D. H. Juers, B. W. Matthews and R. E. Huber, “LacZ β-galactosidase: Structure and function of an enzyme of historical and molecular biological importance,” Protein Science, vol. 21, no. 12, pp. 1792-1807, 2012. (2) de Vrese M, Schrezenmeir J. Probiotics, prebiotics, and synbiotics. Adv Biochem Eng Biotechnol. 2008;111:1-66. doi: 10.1007/10_2008_097. PMID: 18461293.
Initially it’s best to take Optibac Probiotics One Week Flat daily for one week to complement and balance your natural gut bacteria*. After that, people take a week’s course every month, or whenever they feel they need support for occasional bloating*. Others prefer to take one sachet every day on an ongoing basis. All of these options are absolutely fine! See what suits you best.
Optibac Probiotics One Week Flat is dairy and gluten-free, so is fine to be taken by people who suffer with food-related bloating or lactose intolerance(1,2,3). This high-quality supplement contains four, highly researched probiotic strains combined with natural prebiotic FOS fibres, which together help to support the gut microbiome and gently help you to more easily digest problem foods*.
(1). Kocian J. (1996) ‘Further Possibilities in the Treatment of Lactose Intolerance: Lactobacilli’ Prakticky Lekar (General Practitioner). Vol. 74. pp. 212 – 214 (2). Rampengan et al., (2010), ‘Comparison of efficacies between live and killed probiotics in children with lactose malabsorption’. Southeast Asian Journal of Tropical Medicine and Public Health 41: 474-481 (3). Oak SJ, Jha R. The effects of probiotics in lactose intolerance: A systematic review. Crit Rev Food Sci Nutr. 2019;59(11):1675-1683. doi: 10.1080/10408398.2018.1425977. Epub 2018 Feb 9. PMID: 29425071.
With only 7.72 calories per sachet, and 0g of fat, it’s easy to include Optibac Probiotics One Week Flat in your calorie-controlled diet. The carbohydrate content is mostly natural FOS fibres which indigestible and have barely any calorific content.
Definitely! Probiotics for the gut are not gender-specific, so Optibac Probiotics One Week Flat is suitable for everyone over the age of 4 years who wishes to support occasional bloating, gut health, and digestion*. This includes men, women and trans and non-binary people, too!
Yes! Optibac Probiotics One Week Flat is carefully formulated to have a slightly sweet, ‘neutral’ flavour which most people find pleasant to take. However, be reassured that the supplement contains no added flavourings, sugar, or sweeteners – the mild sweet taste comes from the natural Fructooligosaccharide (FOS) fibres.
|One Week Flat (28 sachets) - 28 sachets||Bifido & Fibre (30 sachets) - 30 sachets||Every Day (30 capsules) - 30 capsules||For Women (30 capsules) - 30 capsules|
|Suitability||Gas or Bloating||Regularity||General Digestive||Intimate Flora|
|Dosage||1 daily||1-4 daily||1 daily||1-2 daily|