Testimonial Sample - R's KOSO, Japanese Prebiotic Drink -

Product image 1Testimonial Sample - R's KOSO, Japanese Prebiotic Drink  -
Product image 2Testimonial Sample - R's KOSO, Japanese Prebiotic Drink  -
Product image 3Testimonial Sample - R's KOSO, Japanese Prebiotic Drink  - - R's KOSO
Product image 4Testimonial Sample - R's KOSO, Japanese Prebiotic Drink  -
Product image 5Testimonial Sample - R's KOSO, Japanese Prebiotic Drink  -
Product image 6Testimonial Sample - R's KOSO, Japanese Prebiotic Drink  -

Regular price $99.00



✨Free 474ml of R's KOSO bottle

* We will refund when you meet the requirement.

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    Try 3 Day Koso Cleanse
     Make youtube video of 3 Day Koso Cleanse & Upload to public
    * Make over 3 min video contents, Show before/after, Say your experience.

TAG on youtube #kosocleanse #koso # rskoso #kosojapan

✨Link on youtube https://rskoso.com/



If you have any questions please contact us. info@rskoso.com


- Fermented Superfood, 100+ Vegetables, Fruits, Prebiotics & Prebiotics, Cleanse -

“Koso” means enzyme or ferment in Japanese. Koso drink is a century-old traditional fermented drink made from vegetables, fruits, and plants. It's an essential part of the Japanese style of juice cleanses or intermittent fasting. Koso Cleanse is a century-old traditional Japanese juice cleansing method that has proven to keep your gut healthy.

R’s KOSO is the only superfood supplement on the market that provides balanced nutrition, combining probiotics and prebiotics, which have proven to improve gut health and boost immunity. It's made from over 100 vegetables, fruits, and plants, including seaweeds and mushrooms, and undergoes about 1-year fermentation process. You can enjoy it as a daily supplement but also cleansing and fasting with R's KOSO is a great way to reset your digestive system, and restoring microbiome health.

Good to know : NON-GMO, Dairy-free, VEGAN-friendly, Japan Made, 1-year fermentation, Contains Probiotics & Prebiotics. 70 years' experience to make Koso.

* The taste like Sweet Japanese plum juice. We recommend mix with sparkling water. It's going to be Plum flavor Prebiotic Soda.


Serving size:2 tablespoons (30ml / 1oz) of R's KOSO mix with 1/2 cup water or sparkling water. 1 serving is calculated for Cleansing. It can be used 1/2 serving for daily enjoyment.

Storage:Refrigerate after opening and use within 4 weeks.

Methods:Try Koso Cleanse. 1 bottles is good for the following.

Methods Good For Suggested Use Recommended Duration

Breakfast Cleanse (every day)

2 weeks

1 serving

12 weeks

Breakfast Cleanse (4 Days/w)

4 weeks

1 serving

12 weeks

1-Day Cleanse

3-4 weeks

3-5 servings

12 weeks

3-Day Cleanse

1 program

3-5 servings

Every 2 months

Daily Enjoyment

2-4 weeks

1/2-1 servings

Every day (at least 12 weeks)


- 100+ INGREDIENTS - Vegetables, Fruits, Seaweeds, Mushrooms -

Leafy vegetables mix (cabbage, napa cabbage, lettuce, asparagus, broccoli, canola flower, celery, cauliflower, japanese mustard spinach, spinach, bok choy, taro stem, crown daisy, chisha lettuce, parsley, sprouts, perilla), Fruit vegetables mix (cucumber, wax gourd, tomato, eggplant, squash, bitter gourd, watermelon, corn, okra, bell pepper), Root vegetables mix (daikon, turnip, ginger, udo, yamato yam, nagaimo, potato, yam, japanese yam, sweet potato, carrot, lotus root, taro, burdock, lily bulb), Fruits mix (apple, quince, loquat, japanese plum, strawberry, chocolate vine, kumquat, apricot, sudachi, fig, mandarin orange, iyokan, kiwifruit, persimmon, peach, cherry, melon, grape, plum, pear), Brown sugar, Crude sugar, Malt sugar, Galacto-Oligosaccharide, Beet sugar, Starch, Japanese plum extract, Beans mix (kidney bean, snow peas, fava beans, soybeans, black soybeans, red beans), Mushrooms mix (shiitake, shimeji, eryngii, jellyfish, maitake, crimini, enokitake), Cereals mix (black rice, brown rice, barley, naked wheat, red rice), Seaweeds mix (kelp, wakame, sea lettuce, hijiki, nori, mozuku, tengusa), Herbs mix (plantago, dandelion, kumazasa, clover, aucuba, chickweed, saxifraga stolonifera, agrimonia pilosa, achyranthes bidentate, horsetail, japanese knotweed, water dropwort, mugwort, persimmon leaf, pine needles, cedar leaf, hiba, goji leaf, mulberry leaf), Koji, Yeast, Lactic acid bacteria. contain: Soy
*All ingredients are fermented together. It may vary in color, texture, and flavor due to seasonal and crop variances

- 1-YEAR FERMENTATION - Prebiotics and Probiotics -

A century-old traditional drink, Koso has good bacteria which are Lactobacillus brevis, Lactobacillus plantarum, Lactobacillus casei, Lactococcus lactis. And galactooligosaccharide and dietary fiber are included as prebiotics. Dandelion Greens, Asparagus, apples, Burdock, Barley, Seaweeds act as prebiotics ingredients.


What does R's KOSO taste like?
R's KOSO is a Japanese plum flavored drink.

Is R's KOSO vegan?
Yes. R's KOSO does not contain animal-derived ingredients and the drink is plant-based.

How long has it been fermented?
R’s KOSO is fermented for about 1 year.

What’s the best way to take R's KOSO?
We recommend mixing 2 tablespoons of R's KOSO with ½ cup of sparkling water (or filtered water) for cleansing. It's also good to take with yogurt, alcohol for daily enjoyment.

Is there an optimal time of day to take R's KOSO?
No, it can be taken at any time of the day that suits you. Especially we recommend you drink after you eat/drink too much. It is helpful to digest. Actually many Japanese women take it after dinner or replace the meal.

How does it compare to the Kombucha and other drinks?
R's KOSO is the only 100% plant-based supplement which has probiotics, prebiotics, postbiotics, acetic acid, Phenolics, vegetable, and fruits nutrients, Vitamins (A, B1, B2, B6, C, D, E, and K), Mineral (calcium, phosphorus, potassium, sodium, chloride, magnesium, iodine, iron, zinc, copper, manganese, iodine), 17+ Amino Acids, Short-chain fatty acid.

How different between Juice cleanse and Koso Cleanse?
R’s Koso’s Main feature is the benefit of Gut health. Compared to Juice cleanse, Koso Cleanse has probiotics and prebiotics that have positive impacts on your gut. Some research reveals that the gut is connected to the brain and skin.

How can we control our blood sugar?
If you concern about blood sugar, we recommend consuming Koso a little less or drinking it for 1-2 hours.

Is R's KOSO safe to use when pregnant and when breastfeeding?
Yes, it's all natural plant-based food so you can take it.

Can I take it with other supplements?
Yes, R's KOSO can be taken with every other supplement because it's food.

Does it contain preservatives?
No, it is not contained it. The fermentation process made its shelf life longer.

Customer Reviews

Based on 185 reviews
This is great!

I think it got rid of my acid reflux....thx!

Creative Ways I've Used R KOSO

Lately I've been using R Koso to FLAVOR my teas, drinks, and mocktails. It's been lovely.


If these were more affordable then i wouldnt need to find alternative


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

Real Cleansing!

My wife discovered KOSO and i tried it a few times: I can feel it is doing something wonderful for my gut. I am using it as recommended in mineral water and feel my gut is happy, .... I don't crave food as much anymore and for some reason I want to drink more water! Maybe my body needs it, ... It is worth every drop.

Bloat Be Gone

I wanted to see if this would help with my frequent bloating and it has. I went ahead and purchased the 16 oz. looking forward to a long healthy lasting relationship with this drink. It’s easy on the taste buds. I took it daily opposed to a cleanse, however I do cleanse every 3 to 4 months so this might be my go to 3 day cleanser.

Healthy gut

It cleaned my gut and gave me energy after I did the one day cleaning. It is an excellent product


I did the 3 days detox and it was my first detox ever. I have to say that I eat all the time, I’m always hungry and these detox didn’t make me feel that way at all! I never felt sick or dizzy!! Actually I had a lots of energy, I even wanted to work out. After the 3 days I wanted to continue but I tan out of product :) if you want a detox, def do it. Also I lost almost 3 pounds in 3 days ;)

Try it, you’ll like it

Half way through my first bottle currently. Yes the flavours tasty, but the real magic is happening inside. My digestive system is operating better, I’m in a regular schedule, to keep the trains running. Plus, energy levels are up. This is what’s happened so far, looking forward to the next week weeks!

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