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[Duolac] Yam Yam Plus Kids' Chewable Probiotics (40-Day Supply)
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Yogurt Bears Kids Ask For
[Duolac] Yam Yam Plus Kids' Chewable Probiotics (40-Day Supply)
- 4 billion CFU per day
- 6 Korean strains
- + vitamin D & zinc
- 40-day supply
Getting kids to take anything every day is half the battle. Duolac Yam Yam Plus (듀오락 얌얌 플러스) makes it the easy part: little yogurt-flavored bears they chew like a treat, with no powder to mix and no capsule to swallow.
It's made by Cell Biotech in South Korea, the team behind Duolac, and every serving adds vitamin D and zinc. The Yam Yam kids' line has sold over 37 million tablets in Korea. Looking for an adult probiotic? Try Duolac Gold One-A-Day Packets.
Here's the catch with most probiotics: stomach acid and bile can wipe out the cultures before they ever reach the gut.
Duolac takes a different approach. Its patented dual coating wraps each culture to help it reach the gut alive, and its six Korean-origin strains are all on the US FDA GRAS register.
And because the strains are stable at room temperature, there's no fridge to remember, at home or on the road.
So what's inside?
Full Ingredients List Probiotics: Streptococcus thermophilus CBT-ST3, Bifidobacterium longum CBT-BG7, Bifidobacterium lactis CBT-BL3, Lactobacillus acidophilus CBT-LA1, Lactiplantibacillus plantarum CBT-LP3 and Lacticaseibacillus rhamnosus CBT-LR5, with 4 billion CFU guaranteed per daily serving. Plus zinc oxide, vitamin D3 blend (gum arabic, sugar, corn starch, processed oil, silicon dioxide, vitamin D3, dl-α-tocopherol), isomalt (sweetener), xylitol, sodium carboxymethylcellulose, D-sorbitol (sweetener), fructooligosaccharides, crystalline cellulose, yogurt flavor blend, magnesium stearate, seaweed calcium, milk flavor blend and DL-malic acid.
Added nutrients Vitamin D (10 µg) and zinc (8.5 mg) per daily serving, each 100% of the Korean daily reference value.
To take 2 tablets (1.5 g) once a day, chewed well. Made for kids whose molars have come in, with an adult guiding their intake.
In the box 80 chewable tablets × 750 mg, a 40-day supply. Made in South Korea by Cell Biotech Co., Ltd. (Gimpo).
To keep At room temperature, away from humidity and direct sunlight. Good for 2 years from the date of manufacture. Don't eat the desiccant packet.
Good to know Contains milk and soy. If your child has hypercalcemia, a medical condition or takes medication, check with a doctor first. This is a dietary supplement. It is not intended to diagnose, treat, cure or prevent any disease.
[Duolac] Yam Yam Plus Kids' Chewable Probiotics (40-Day Supply)
A probiotic kids actually ask for
Duolac Yam Yam Plus (얌얌 플러스) is a yogurt-flavored chewable probiotic for growing kids, with vitamin D and zinc added. Little bear-shaped tablets, from Korea's World-Class Product probiotic brand.
World-Class Product brand, Korea's Ministry of Trade, Industry and Energy (2024).
Over 37 million tablets sold
Yam Yam is one of Duolac's best-loved kids' lines in Korea: 37,780,600 tablets sold and counting.
Cumulative sales as of April 2025.
Parents keep coming back
Here's what parents on Duolac's Korean store say:
“My kid loves it, so I'm buying it again.”
“My child prefers it to the powder type and eats it well.”
“I have two kids taking it, and the younger one asks for it even more.”
“We've tried the whole Yam Yam range, and this is the one they eat best.”
Reviews from Duolac's Korean store, translated by Gochujar. Individual results may vary.
Why parents choose Yam Yam Plus
A probiotic only works if your child will take it every day. Yam Yam Plus makes that the easy part: a tasty chewable, just two tablets a day.
It has a yogurt flavor kids enjoy, and it brings probiotics, vitamin D and zinc together in one. Its six probiotic strains are 100% Korean in origin, and there's no fridge needed.
Cute little bears, yogurt flavor
Each tablet is shaped like a small bear and chewed like a treat, so there's no powder to mix and no capsule to swallow.
Two chewable tablets. Once a day.
A daily probiotic designed around growing kids.
Every daily serving guarantees 4 billion CFU from six probiotic strains, 100% Korean in origin, plus vitamin D (10 µg) and zinc (8.5 mg), each 100% of the Korean daily reference value.
It's made only with strains on the US FDA GRAS register*, Duolac's patented dual coating helps the cultures reach the gut alive, and it keeps at room temperature.
*GRAS relates to ingredient safety, not to health benefits.
Made for your family if…
Your child won't take powders or capsules.
You want probiotics, vitamin D and zinc in one simple step.
Your child is a picky eater.
You want something easy to keep on hand at home or on trips.
Your child's molars have come in and they can chew tablets.
Specialists, not generalists
Before you choose a probiotic for your child, check who designed it. Duolac has spent 30 years researching one thing: probiotic strains of Korean origin.
Six strains, all from Korea
Chosen with Korean guts in mind: a blend of lactobacillus and bifidobacterium, five of them patented strains.
They are Streptococcus thermophilus CBT-ST3, Bifidobacterium longum CBT-BG7, Bifidobacterium lactis CBT-BL3, Lactobacillus acidophilus CBT-LA1, Lactiplantibacillus plantarum CBT-LP3 and Lacticaseibacillus rhamnosus CBT-LR5. All but CBT-ST3 are patented.
47 scientists behind every tablet
Duolac doesn't buy in its strains. It develops them itself: sourced from healthy Koreans and traditional Korean fermented foods, safety-verified in human trials, and researched strain by strain with next-generation genome sequencing.
That work adds up to 107 patents, 35 human trials, 124 published papers and 231 research achievements in total.
Cell Biotech figures, as of 2025.
What does “CBT” mean?
Every probiotic strain has a name, just like people do. CBT stands for Cell Biotech, the company behind Duolac, and marks strains Duolac developed itself. When you see CBT, you know where it came from.
Safety you can check for yourself
Probiotics are live cultures, so safety comes first, especially for kids. Duolac uses only strains on the US FDA GRAS (Generally Recognized As Safe) register, and holds more GRAS-listed strains than any other company in the world (as of February 2024).
GRAS is the FDA's safety recognition for food ingredients. It relates to safety, not to health benefits.
Verified at every level
Duolac doesn't just say its probiotics are safe. It shows you the paperwork.
Its strains' functionality is recognized under Korea's MFDS health functional food standards. The strains are deposited with Germany's DSMZ and the Korean Collection for Type Cultures (KCTC), and the DNA sequence of each strain is registered with the US NCBI.
Duolac exports to 55 countries and was Korea's No.1 probiotic exporter 11 years running (2013–2023).
Quality certifications: GMP, CODEX HACCP, ISO 9001. Certifications apply to the manufacturer and specific ingredients or strains.
More than probiotics
Alongside 4 billion guaranteed CFU, every daily serving adds two nutrients growing kids need.
Probiotics support gut health. Zinc is needed for normal immune function and cell division. Vitamin D is needed for calcium absorption and bone formation.
Functions as recognized by Korea's MFDS for health functional food ingredients.
Why the blend matters
Each strain has its own home in the gut and its own growth pace, and gut flora changes as kids grow. Yam Yam Plus pairs lactobacillus and bifidobacterium in a 67:33 ratio, designed by Duolac's Microbiome Institute for children.
Protected all the way down
A probiotic only helps if it survives the trip. Duolac's patented dual coating wraps each culture in a tough matrix of protein and polysaccharide, shielding it from stomach acid and bile so it reaches the gut alive. It's patented in the EU, US, Korea, China and Japan.
Up to 221× more reach the gut
The coating makes a real difference. In a human study, people taking dual-coated probiotics had up to 221 times more of the strain in their gut (L. rhamnosus CBT-LR5) than those taking uncoated probiotics.
Randomized, double-blind, controlled study of 40 adults over 2 weeks. Individual results may vary.
No fridge? No problem.
Duolac's CBT strains were confirmed to survive from −70°C all the way up to 40°C, so they're happy at room temperature: in the kitchen cupboard, a school bag or a travel case.
Tested by the Korea Functional Food Research Institute and Korea Food Research Institute (samples provided by Cell Biotech).
From strain to your door, all Duolac
No outsourcing, no shortcuts. Duolac runs every step itself, to global standards: strain development and research, culturing and isolation, patented coating and freeze-drying, strain blending, finished product manufacturing, quality testing, and delivery and customer service.
Full Ingredients List
Duolac Yam Yam Plus Kids' Chewable Probiotics
Probiotics: Streptococcus thermophilus CBT-ST3, Bifidobacterium longum CBT-BG7, Bifidobacterium lactis CBT-BL3, Lactobacillus acidophilus CBT-LA1, Lactiplantibacillus plantarum CBT-LP3 and Lacticaseibacillus rhamnosus CBT-LR5 (4 billion CFU guaranteed per daily serving), zinc oxide, vitamin D3 blend (gum arabic, sugar, corn starch, processed oil, silicon dioxide, vitamin D3, dl-α-tocopherol), isomalt (sweetener), xylitol blend (xylitol), sodium carboxymethylcellulose, D-sorbitol (sweetener), fructooligosaccharides, crystalline cellulose, yogurt flavor blend (dextrin, propylene glycol, gum arabic, ethanol, triacetin, natural flavor, synthetic flavor), magnesium stearate, seaweed calcium, milk flavor blend (dextrin, synthetic flavor, propylene glycol, gum arabic), DL-malic acid.
Allergy: contains milk and soy
Original label (Korean)
Real Product Photos
Straight from Korea
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