Average Rating

4.3 / 5

A high quality friendly bacteria supplement with FOS, for those seeking an easy to take, 7-day course.

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  • After some scepticism, I took some advice from a friend and I bought a week supply of ‘One Week Flat’. I really wanted to try to get my bloating under control, and this really actually worked. I was still hesitant for about 3 days, but by day 6/7 I could see and feel a different. I used this as a kick-starter and now take ‘Everyday Extra Strength’ daily. Thanks Optibac!

  • They didn't help me with gas/indigestion issues. I didn't experience any adverse effects either. My symptoms have been linked to SIBO which I was tested for recently. I am currently on a course of antibiotics after which I will try another OptiBac formula.

  • I wasn't overly impressed with this. Didn't help with bloating and made me constipated.

  • 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.

  • 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.

  • 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 and the other half in the afternoon to break up the recommended dosage in two takings. It is very important to test what works best for you. One Week Flat is great to try if this is your first go at Probiotics. Also great customer service!! ;-)

  • I've given an average rating as I've not yet had any improvement. I was hoping to feel and look less than 8 months pregnant but have had no significant changes. I've also had a slight increase in...well, the farts, which have been more ripe than usual. So the rating is not to say they're not doing something good on the inside, perhaps I'm particularly 'backed up', so to speak. I am going to order a daily probiotic and see if things improve. Good luck peeps. Oh, and try not to be creeped out by the thought of ingesting the millions of bacteria...just throw your head back and swallow.

  • Did nothing except give me terrible cramps. Stopped after day 4 because the cramps were too much.

  • I took this and saw increase in my weight next day, thought it was co-incidence. Took it for 3 days and gained 1.5Kg weight. This was not co-incidence as I was walking and eating regular food. I stopped at 3rd day, had relief in bloating a bit but seeing the weighing machine, had all other anxieties. Not sure if it reacted to me only like this.

  • I have just tried the One week flat and it was great for me. I have been advised to take probiotics.. I've tried other but none of them were as great as this one. I am also trying a different OptiBac product and I have high hopes. Massive thank you to Kerry for her assistance and time responding to my enquiry.