The Leading Way To Improve Your Gut Health


Fermented Superfood KOSO

R's KOSO is the only 100% natural supplement on the market that provides balanced nutrition, combining probiotics + prebiotics + postbiotics and enzyme which has proven to improve gut health.

100+ INGREDIENTS - Vegetables, Fruits, Seaweeds, Mushrooms

R's KOSO contains over 100 different fruits, vegetables, and plant-based ingredients. It provides balanced nutrition which are 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, Acetic acid, enzyme and, Polyphenol.

1-YEAR FERMENTATION - Prebiotics, Probiotics, and Postbiotics

A century-old traditional drink, KOSO has good bacteria which are Lactobacillus brevis, Lactobacillus plantarum, Lactobacillus casei, Lactococcus lactis etc. And galactooligosaccharide and dietary fiber are included as prebiotics. Dandelion Greens, Asparagus, apples, Burdock, Seaweeds act as prebiotics ingredients. 17+ Amino Acids, Short-chain fatty acid, Acetic acid, and, Polyphenol are well known as postbiotics. These nutrients developed by the fermentation process.

100% NATURAL - Vegan, Gluten-free, Non-GMO, Dairy-free, Japan Made

It is Gluten-free, NON-GMO, Dairy-free, VEGAN-friendly and, 100% natural product. All Ingredients and manufacturer are in Japan. Our factory has 70 year's experience to make Koso. The product is manufactured to exceptional standards by highly trained professionals.

Dr. Zyrowsky Explains  

Our Koso Life

Alana Arbucci | @Alana Arbucci

"I cannot believe I lost 2 inches off my waist. That's actually crazy. Really helped to suck me in."

Mark Strong | @thehouseofstrong   
Pilates Trainer, Founder of House of Strong

"My morning routine is crucial, I must take care of myself before working with others."

Dr. Monisha Mishra | @thementalhealthdoc
Mental Health Doctor

"I begin my day with 2 tablespoons of R’s KOSO Honestly this drink has helped me so much of gut health in terms of bloated stomach and constipation."

Tina Harris| @tinatanakaharris  

"Surprisingly, I actually felt like I had more clarity and was quite productive in the morning even with taking it just once a day"

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


✔   Enhanced gut health

✔   Healthy Weight Digestion

✔   Help with skin trouble

✔   Boost immunity

✔   Mental clarity & Sleep

1bottle is good for

✔   Breakfast Cleanse - 2-4 weeks

✔   1-Day Cleanse - 3-4 times

✔   3-Day Cleanse - 1 program

*Mix with sparkling water to make a Plum Flavored Soda.

$99.00 ($6.6 / Serving | Free Shipping)

$99.00 $74.25 ($4.95 / Serving | Free Shipping)

*Cancel Anytime

Trial Pack - 30ml × 5 bottles

It's NOT A SHOT. We recommend mixing with sparkling water.

Limit One per Customer

$39.99 ($8.00 / Serving)

Trial Pack is good for

✔   Breakfast Cleanse - 1 week

✔   1-Day Cleanse - 1 time

Why Is Gut Health Important?

Gut health points to the balance of good microorganisms that live in the digestive tract. In recent years, scientists have discovered that the gut microbiota has been linked to many aspects of health relating to digestion, from immunity to brain and mentality, to chronic illnesses, including cancer.

Gut health effects immunity system

"When gut health is good, you’re less likely to experience damaging inflammation and lapses in immunity."

Probiotics helps to improve mood

"Some research has found that probiotics may help boost mood and cognitive function and lower stress and anxiety. "

Your gut and brain are connected

"Your gut and brain are connected physically through millions of nerves, most importantly the vagus nerve. The gut and its microbes also control inflammation and make many different compounds that can affect brain health."

What Is Koso Cleanse? Is it Gut Cleanse?

Koso Cleanse is a century-old traditional Japanese probiotics juice cleansing method that has proven to keep your gut healthy. Cleansing with KOSO is an easy and sustainable way to do cleanse constantly taking balanced nutrition. Also, KOSO is rich in probiotics, prebiotics, postbiotics and, enzyme, It's a great way to reset your digestive system, and restoring microbiome health. Try Breakfast Cleanse,1-Day Cleanse, 3-Day Cleanse and Moon Diet.


I was able to lose my weight for around 5,6 pounds and clear my stomach. Plus, I didn't feel hungry that much during the process.

Youngrok Kim

The taste is great. It tastes like a sweet Japanese Plum Juice. It is much better than Kombucha. Easy to consume daily.

Samuel M

I’m feeling fantastic— energized and distress-free. KOSO is now officially a part of my self-care regimen.

Bruce Sadia
Yoga Teacher and Integrative Coach

I have found it helpful during my intermittent fasting as well as with my gut support.

Blake Sinclair
Author and Life and Wellness Coach

It changes your body and mental a lot. Even you feel hungry on Day2, it comes OK and you will get to the next stage of your life. I recommend.

Takeshi Homma

You will not find a better drink if you want to achieve your personal weight goals. Tastes good and just the right portion.

Noriya Tarutani
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