R's KOSO
R's KOSO offers a century-old traditional Japanese postbiotic superfood drink made from over 100 fruits, vegetables, and plant-based ingredients. The drink is designed to improve gut health through a year-long fermentation process.
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R's KOSO · Jun 18
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R's KOSO · Jun 16
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R's KOSO · Jun 11
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R's KOSO · Jun 09
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R's KOSO · Jun 04
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R's KOSO · Jun 02
R's KOSO customer service
Use any of the convenient means below to contact R's KOSO customer service.
Headquarters
12655 W Jefferson Blvd
Los Angeles, CA 90066
[email protected]
Returns
What is the return window?
Our policy lasts 14 working days. If 14 working days have gone by since your purchase, unfortunately, we can't offer you a refund or exchange.
Who pays for return shipping?
You will be responsible for paying for your own shipping costs for returning your item. Shipping costs are non-refundable. If you receive a refund, the cost of return shipping will be deducted from your refund.
Are there any items that are non-returnable?
Only regular priced items may be refunded, unfortunately sale items cannot be refunded. Only requests of refund-related within the scope of our regular return policy and/or in case of defective product may be approved.
Editor's Take
So here's the thing about R's KOSO-it's basically what happens when a century-old Japanese health secret meets modern gut health obsession, and honestly? The timing couldn't be better.
KOSO is a century-old traditional Japanese postbiotic superfood drink that's been quietly doing its thing in Japan for generations. But what makes it interesting isn't just the age-it's the process. It's made from over 100 vegetables, fruits, and plants, including seaweeds and mushrooms, and undergoes about 1-year fermentation process. That's not your typical weekend kombucha brewing project.
The founder's story is pretty relatable, actually. In 2018, I moved to NY from Tokyo with my family to chase my American dream. In a really short time, my lifestyle changed. Classic American dream meets American diet reality. I lost 6 pounds and my digestive issues were almost gone. I'd also been suffering from mild eczema but it cleared up.
What sets R's KOSO apart from the crowded gut health market is the complexity. 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. That's not just probiotics-that's a whole ecosystem in a bottle.
And the taste? R's KOSO is a Japanese plum flavored drink. The taste like Sweet Japanese plum juice. We recommend mix with sparkling water. It's going to be Plum flavor Prebiotic Soda. So it's not exactly a punishment to drink, which is refreshing in the health drink world.
The company's been pretty transparent about manufacturing too. All Ingredients and manufacturer are in Japan. Our factory has 70 year's experience to make Koso. That's some serious fermentation street cred.
But here's what really caught my attention-the customer feedback is surprisingly honest. People mention the price point being high, which the company doesn't try to hide. This product is overpriced. I wanted to continues to use to see if there is more benefit, but the price deters me. Yet others say The price is what stopped me at first but totally worth every penny to be able to move and have energy again.
R's KOSO isn't trying to be everything to everyone. It's a premium fermented drink with a specific purpose and a pretty hefty price tag to match. Whether that's worth it probably depends on how much you value traditional Japanese fermentation methods and whether your gut health is worth the investment.