One Week Flat Probiotics

Recommended use

Natural dietary supplement suitable for adults and children (from 4 years onwards) with the following recommendations:

• Take 1 sachet daily for 7 consecutive days, preferably with breakfast.
• Pour an inch of water into a tall glass, leaving plenty of room for swirling.
• Shake the sachet before gently sprinkling the powder into the glass.
• Vigorously swirl the water around in the glass making sure the powder is dissolved.

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.

Storage

• Store in a cool, dry place below 25°C (77 °F) and out of direct sunlight.

Customer Questions

All questions answered by probiotic experts Dr. Kate Stephens PhD (Food and Microbial Sciences) BSc(Hons) Medical Microbiology and Kerry Beeson BSc (Nutritional Medicine) Nutritional Therapist.

Is One Week Flat suitable for both men and women?

Definitely! Probiotics for the gut are not gender-specific, so 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!

How often should I take One Week Flat probiotic supplements?

It is recommended to take One Week Flat every day for at least one week. After that it is down to personal preference. One Week Flat can be used in the short term, as a week-long course for those experiencing occasional bloating* or if you are looking for an affordable way to 'top up' your gut bacteria every now and then. Equally, it can be used daily on an ongoing basis if you find this suits you best. There is no ‘right’ or ‘wrong’ way to take it. Here are some of the ways that our loyal One Week Flat customers take this supplement:​

• A 7-day course regularly every month
• A 7-day course as and when required
• One sachet every day on an ongoing basis

What does One Week Flat taste of?

One Week Flat has a fairly ‘neutral’ taste and most people find it easy and pleasant to take. You may notice a slight natural sweetness which comes from the prebiotic fibers, but you can rest assured that the supplement contains no added flavourings, sugar, or sweeteners.

I get bloated when I eat foods like dairy or gluten - can I take One Week Flat?

One Week Flat is gluten-free so is fine to be taken by those with food-related bloating. It is also suitable to be taken by those with lactose intolerance^1,2,3. It contains 4 well-researched probiotic strains combined with 0.3g FOS prebiotic fibers. Individual responses to a supplement can vary, but the majority of our customers get on very well with this formulation; in fact, some people find that probiotics, such as the Lactobacillus rhamnosus Rosell-11 strain in One Week Flat, help to improve digestion* of certain foods like dairy products^1,2,3.

I'm on a calorie-restricted diet. Can I take One Week Flat?

One Week Flat contains just 7.72 calories per sachet, and 0g fat. Most of the carbohydrate in the supplement comes from the prebiotic fiber (Fructooligosaccharides, also known as FOS) which is not digested, and therefore has almost no calorific value. But the FOS feeds the friendly bacteria in our gut and helps them to flourish*.

Does One Week flat help with occasional bloating?

Many probiotic strains, including those found in 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 bloating⁴*. The good bacteria in the supplement also help to discourage the growth of undesirable bacteria^5* which tend to product a lot of gases. For these reasons, many people find that One Week Flat can be helpful for occasional bloating*.​

Safety

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.

This is a dietary supplement and is not intended to prevent, treat or diagnose any medical conditions. Dietary supplements should not be used as a substitute for a healthy diet and 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.

References

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.

Ingredients 

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.

Suitability

• Vegan
• Vegetarian
• Gluten free
• Yeast free
• No added sugar
• GMO free
• Suitable during pregnancy
• Suitable during breastfeeding
• Flavorless
• Free from artificial flavorings, colorings and preservatives
• No chemicals or parabens

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.

Customer reviews

• 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!

  Lauren - 1st March 2022

• Used to get so bloated whenever i had my period but these probiotics have put a stop to it! I take a course once a month, starting a 2 or 3 days before my period is due.

  Jessica O - 17th January 2022

• I was living with serious bloating when I discovered One Week Flat. I use it regularly now and that bloating no longer happens! I no longer live in England, but I was delighted to find that I could buy it locally. (EU)

  Dorian - 14th June 2021

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USA Shipping

Coronavirus Update

We ship all USA orders from our warehouse in Hampshire in the UK. Due to the ongoing global pandemic many US, European and Worldwide postal routes are seeing increased transit times. Delivery times provided on this site are therefore a guide and not a guarantee. Express Services largely remain unaffected however these routes are typically subject to local tax and duties at customs.

USA standard shipping: $4.99

International postal order - typically deatched and delivered within 5-10 working days.
Free standard shipping on orders over $100.

USA express shipping: $6.99

We use DHL and orders are typically dispatched and delivered within 2-5 working days.

Good to know

• We'll send you an email to confirm once your parcel has been dispatched.
• For delivery queries, please email enquiries@optibacprobiotics.com. 
• We are unable to ship orders to PO boxes.
• Product prices on this website are always shown in US dollars (USD $) and exclude tax - tax is not applicable as orders are fulfilled from the UK.

Worldwide Delivery

• We deliver to more than 50 countries.
• Shipping is charged at cost - please note that duties may apply.
• Please allow 3-7 working days for delivery within Europe and 5-12 days to all other destinations. Includes order tracking.  
• If you are located within the United Kingdom or Europe, we recommended switching to our UK website.
• International deliveries might currently take a little longer due to the global coronavirus situation. Please refer to the webpage of our international delivery provider DHL to confirm the number of days it takes to receive your order and whether they currently ship to your country.
• Most international delivery prices are dependent on the size and weight of your order and where it is being sent. You'll be shown the final price of shipping in the checkout, before payment, once we have your address and order details.
• Long distance shipping and short-term exposure to high temperatures will not compromise the viability of our products. Customers living in very hot countries should store the products out of direct sunlight and refrigerate if the option is available.

For more details regarding international orders, currency conversion and applicable tax for orders outside the USA, please take a look at our delivery FAQ.