Based on 831 reviews
Tastes great and great for you!

I finally found something that is good for me that doesn’t taste awful. The one thing that Americans always have a problem with is getting enough vegetables in their diet. Part of the problem is is that the quality of vegetables that we get in the average supermarket is so substandard it’s hard to get excited about eating vegetables. When I heard about R’s Koso I was intrigued and hopeful. I start every day with a shot of it.

My daily routine

R’s KOSO is an essential addition to my morning routine. It helps me with my digestion and regularity. The taste is great! I highly recommend it.

My gut best friend!!

I have tried various probiotic brands on the market , but none compare to Koso. Since using it my sleep has improved , my skin is glowing and it has helped control my cravings for sweets . This product is worth every penny .

tastes great and good for you

it really works. Mix mine with Pinapple juice and down it before breakfast. Never felt better

Easy sweet drink

Excellent taste


So far right now help a little bit

Love the product!

Can feel the difference within a few days.
Will buy again!

I’m using this product already one year and I absolutely love it, it does a wonderful job.My gut health has been improved significantly.
But it is very pricey and since I live in Europe I am not able to subscribe and pay less .Also the team never responded to my emails.Not cool:/

My breakfast every day

I don't know what I would do without R's Koso! I drink it every morning for breakfast - and on days when I feel up for fasting, I'll just have a couple glasses of it to get me through. It's amazing! I think my skin and hair have improved since I began drinking it - just superb!!

R's KOSO - Japanese Postbiotic Drink (474ml / 16oz)


I have been so busy I haven’t had time to post on IG my review but OMG. I did the 3 day cleanse and instantly felt the difference. It was like a rebalance to my gut. Detoxifying and I didn’t feel less energy as I thought I would. Maybe it was mind over matter and the fact that I was so busy. I used regular spring water but one time I did use mineral water which felt a little bit more filling but still I preferred flat spring water to non bloat. I highly recommend others do this esp as a reset. I had bone broth and artichoke and lentils 2 days before and 2 days after and since then have been sticking to a clean whole balanced dietary lifestyle ; which is so important

R's KOSO - Japanese Postbiotic Drink (474ml / 16oz)

R's KOSO - Japanese Postbiotic Drink (474ml / 16oz)

Not for me

I wasn’t fond of the taste at all. Unfortunately this product didn’t work out for me. I hope it works for others

Delicious and subtle

I use this when I’m fasting and also for everyday health in my tea.


Love this meal replacement and I don’t feel too Hungry or listless like other cleanses because this has so many nutrients. Side benefit is my skin is glowing so much. Love it. The only thing is it’s kind of small for the price. Gone in about a week.

Amazing experience

Koso was tasty and I didn’t feel hungry during fasting, so I would like to fast again in 2-3 months.

I LOVE IT! It made me feel good overall and it made my gut happy :-)

My morning routine!

I know the benefit of Probiotics but not too fan of taking a pills so I'm happy that I found Koso! My morning start with warm water with Koso, it's tasty and gives me a positive feeling that I'm doing good thing for my body. I don't eat breakfast so it is perfect morning routing to gives my stomach a good kick start!

It does what I expect it to

I like this drink. The taste is fine and my body reacts in a positive way. The thing is that it's way too expensive for me so I had to cancel my subscription after 6 months.

Pretty Good!

I tried this once with limeade, and another time with ginger ale -- but I like it best almost straight with just a little yuzu juice for flavouring! I drink it as a shot, using a tiny cute glass! As for effect, I feel it's a bit too soon for me to know yet ....

Love it. Great product
Can’t wait to start a 3 days cleanse.


Excellent! After a week I feel less bloated and less tired. The flavor is sweet and the taste is like raw smooth honey, I take it every morning, two large spoon in my tea.

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