£7.24 £20.83
Excluding VAT
Product rated 4.3 in 78 reviews

This is a high quality, short term course of live cultures. 'One week flat' from OptiBac is gluten free and therefore may be especially suitable for those with bloating.


Vegetarian Vegetarian
No Gluten No Gluten
Suitable during Pregnancy Suitable during Pregnancy

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What's it for?

A natural bacteria supplement from OptiBac to be taken for 7 consecutive days.

Who's it for?

For those seeking a high quality, short-term live cultures supplement.

Each sachet:

Provides 5 billion live cultures + 0.3g FOS fibres.

OptiBac 'One week flat'

'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. Please scroll to the bottom of the page to read reviews from our customers who have tried this supplement.

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 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 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 friendly bacteria, '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.

Healthcare professionals can read scientific research on L. acidophilus Rosell-52 on the Probiotics Database.

Please note: As of May 2014, this product has a new name ('One week flat') in the EU. The ingredients remain the same.

Directions

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:

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

Storage

Like the rest of the OptiBac range, this does not require refrigeration.

Store away from direct sunlight.

Safety

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 or 'For travelling abroad'.

Nutritional Information

Frequently Asked Questions

Healthcare professionals can follow the links below to read FAQs.

You can find more of our frequently asked questions on our FAQ page.

 

Delivery Options

Currency 

As we are an UK-based company, the product prices on our website will always be shown in pounds sterling (GBP £). As currency exchange rates fluctuate on a daily basis, the conversion to local currency will be made by your bank on the day of purchase. Check out today's currency conversion rates using a search engine and an appropriate currency conversion tool, though do bear in mind that the rates displayed may be subject to change before your bank processes your transaction.


Next Day UK Delivery 

Order before 3pm from Monday – Friday and select option ‘next day delivery’ at the checkout for your order to arrive the next day.

Next Day: £6 - guaranteed next-working-day delivery to most of the UK* if you order by 3pm Monday to Friday (requires signature)

*excludes: Channel Islands, Herm Island, Isle of Man, Isle of Wight, Northern Irish postcodes BT18 & upwards, Sark, Scottish borders and offshore, and a small number of remote mainland destinations as determined by our delivery courier


UK Delivery 

UK delivery is free when you spend £100. The delivery discount is automatically applied at the checkout.

Once your parcel has been collected from our warehouse, we will send you a confirmation email to let you know that the parcel has been dispatched. For any further delivery queries, please call us on 01264 363 193 or email [email protected].

Orders placed before 3pm will be dispatched on the same working day.
Orders placed after this time will be dispatched the following working day.

Standard: £1.75 - please allow 4-7 days for delivery
First Class: £2.50 - please allow 1-3 days for delivery

Delivery within the United Kingdom and Northern Ireland has a fixed price, regardless of the size and weight of your order. Delivery times are estimates and not guaranteed unless otherwise stated.


International 

We deliver to more than 50 countries and offer free delivery on orders over £100. The delivery discount is automatically applied at the checkout. Please see International Delivery Coverage below to find out if we deliver 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. The main exception to this is delivery to EU countries using our International Express Courier service. This has a fixed delivery cost for each country, regardless of the size of your order.

  • This was my first try at probiotics and very happy with the results. I feel more comfortable and it compliments my other improvements to my diet. It's great that it dissolves in water and doesn't taste of anything unlike other solubles I have tried.

    I have now moved on to the everyday one but will do occasional courses of flat stomach.

    Delivery was quick and easy to reorder directly.

    London
  • I've taken One week Flat for 28 consecutive days and noticed absolutely no difference with bloating and passages of air (flatulence) and stools. I read many positive reviews about this product but in my case it didn't make any difference so I won't buy it again. For my IBS condition I might need something stronger like For Every dAy Extra Strength which I might test in the future...

    London
  • Love this product! I have been taking One Week Flat for a while now and have found it very comfortable. It is not too strong for my sensitive digestive system. I take half a sachet in the morning a... Read more

    London
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