Based on 441 reviews

Love this product. I mix it with 2-3 ounces of mango ice. My stomach is back to normal. Great product

Great product

My lifestyle is very busy on top of the challenges of remaining healthy in current events . This product is a perfect compliment to my health standards and commitment to quality . Health is everything . This is a staple I will continue to use as a part of my health plan .

I am not sure how effective yet. Should I take it empty stomach?
Morning or before evening dinner ?

In LOVE ❤️😍 Lifetime member, extremely satisfied.

I’ve always struggled with my weight my whole life I don’t exercise a lot. My diet is bad eating carbs all the time. I don’t eat vegetables like I’m supposed to and a lot of them taste disgusting, so when I found this I didn’t hesitate for a second to get it after I read and researched all the health properties. As soon as I got it I followed the directions, opened the bottle and the smell hit me it smelled funny it’s not stank stank but it is fermented fruit and vegetables it will have a smell of some sorts. But don’t let that scare you I’ve tried countless things with health benefits that smelled nasty and tasted nasty for the sake of being healthier and losing weight. But no more I tried the koso with water and I tell you it tasted like Juice NO YUCKY FLAVOR AT ALL!!! It’s so good!! I had to contain myself I was gonna drink that whole bottle right then and there I’m not playing. I was thinking y’all don’t know what y’all just did you finna go out of business by yours truly… As soon as you drink it your body recognizes it like this what I want and need it’s an amazing feeling like your dehydrated and you finally get water. I drink it everyday as a part of my routine it helps to clean out your gut of all the toxins you ingest on a regular or if I’m fasting for a few days I drink three cups a day for three days or five days. I’m losing weight I have more energy, I’ve been telling everyone who will listen about this product, It’s Pricey…. But it’s worth it, I Promise… Treat Yourselves!! We deserve it! The only thing I regret is not getting a Bigger Bottle a little goes a long way and just a suggestion when I drink it I add ICE, it makes it soo much better add ice.

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

Very Good

I really liked the flavor, and I felt that although I was fasting, it didn't make me as hungry as I thought I would. I think it's because KOSO got all the good nutrients that let our body keep going.

A wonderful product

I love this product. I have it every morning with yogurt. It helps with blotting and constipation. I don’t eat as much food throughout my day!
Love, love

Game Changer

I have had a puffiness about me for 6-months, that I attributed to allergies. Nothing was sitting well in my stomach, my digestive system was all out of whack, and I assumed I was just getting older. I tried Koso after taking multiple rounds of over-the-counter pro & pre-biotics without success. It's a game changing experience and I feel renewed. I did the 3-day cleanse, which I've never attempted, and was amazed. I wasn't hungry, had energy, and only had a headache for one of the days. It was all worth it because I'm feeling 100% and back on track!

I will be subscribing to the product and using it daily in the 2022.

R's KOSO - Japanese Postbiotic Drink (474ml / 16oz)×2 bottles

Absolutely fantastic

I take a shot every day to smooth out all the many pit-falls that necessarily accompany lack of access to quality ingestable food.

5 stars

Felt great after my 3 day cleanse. Highly recommend

Wonderful drink

I didn’t receive the order until last week. My first five days cleansing help me feel more energy and reduced my appetite. I love the taste but not the aroma. Maybe my sense is too sensitive! Inclusion, I love Koso’s probiotic drink. I recommend Koso’s to friends!!😊🤗

The best. Definitely buying again.

Omg this is the best Probiotics I ever had in my life. I definitely recommend worth every penny.

Would Def buy again

Lost 5 lbs doing 3 Day fast with this. Tastes light and refreshing. Helped keep hunger away. Plan to do fast with this product every couple of months. Wife had severe eczema and the fast with this product also calmed the Inflammation down.

Superb heathy product from japan that boosts my immunity

I enjoy taking a shot glass a day of this amazing product that provides energy and immunity and support for my body's health! I feel the changes and enjoy drinking it. It's sweet and I don't mix in water.


I like R’s Koso but I had to readjust in how many times I take it . I notice that it has not only cleansed me, but my skin is healthier and skin is more vibrant. I have more energy. I have no complaints and would recommend this product.

It was cool

Smelled bad but tasted fine. I did the morning breakfast cleanse for 7 days.I didn't necessarily have any stomach problems beforehand so I'm not really sure how to tell if the cleanse "worked" or not. I didn't lose weight or anything. I didn't feel too hungry from missing breakfast. I felt pretty good/healthy. Not much of a difference.

Gut buster

Has calmed my belly down a bit and I feel energized!

The Best so far

Excellent product. Really works. Tastes good.

Sweet healthy drink

I enjoy drinking this product with water twice a day. My spouse is Japanese and drinks it on its own in the morning and evening time. I highly recommend it for a balance of what my body needs daily. Thanks 🙏 a lot! James

Best Cleanse

Love it and I will do it again. It was super easy. I never felt hungry and I did not get a headache from not drinking coffee!!! Love it!!!

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

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

Close (esc)


Use this popup to embed a mailing list sign up form. Alternatively use it as a simple call to action with a link to a product or a page.

Age verification

By clicking enter you are verifying that you are old enough to consume alcohol.


Main menu

Shopping Cart

Your cart is currently empty.
Shop now