Daiso Probiotics: How to Compare CFU Counts and Prices

Probiotics at Daiso Korea: what is on the shelf?

Probiotics are one of the fastest-growing sections of Daiso Korea's supplement aisle. Chong Kun Dang Health's Lactofit, one of Korea's best-known probiotic brands, has been sold there since 2025, and more recently Yuhan Corporation, one of Korea's largest drugmakers, launched a Daiso-only line called "Yuhan Live Probiotics." Reports put the number of health foods at Daiso Korea at around 100, up from about 30 a year earlier.

Most boxes cost KRW 5,000 (about US$3–4), but they hold different numbers of days, so the daily cost varies. These products are made for the Korean market, so you will generally not find them at Daiso stores outside Korea.

Products, pack sizes, and cost per day

Based on Daiso Mall (Daiso Korea's online store) listings and news reports. Cost per day is our own calculation (price ÷ days). Where we could not confirm the live culture count, we say so.

Daiso Mall often does not show culture counts online, but Korean law requires them on the box. Check the back of the pack in store. Stock also changes quickly, so not every store carries every product.

What do the CFU numbers mean?

CFU (colony-forming units) is the count of live bacteria. Korean probiotic labels show two kinds of numbers, and it pays to know which one you are reading.

• 투입균수 (input count): how many bacteria went in at manufacture. Bacteria die over time, so you get fewer than this. Big headline figures such as "100 billion" are usually input counts.
• 보장균수 (guaranteed count): how many the maker guarantees are still alive at the expiry date. This is the number to compare.

Korea's Ministry of Food and Drug Safety (MFDS) sets the daily amount for probiotic health functional foods at 100 million to 10 billion live CFU. That range is lower than the 10–50 billion CFU you often see on US or European products, but there is no good evidence that higher counts work better. Labels elsewhere also differ: some show the count at manufacture, others "at expiration," so a Korean 10 billion CFU guarantee is not automatically weaker than a foreign 30 billion CFU claim. A product guaranteeing only 100 million CFU, the bare minimum, is the one Korean pharmacists have criticized.

Comparing price and CFU together

Divide the daily cost by the guaranteed count in units of 100 million CFU. A product guaranteeing 2 billion CFU (20 × 100 million) for about KRW 167 a day costs about KRW 8 per 100 million CFU. A product with the same daily price that guarantees only 100 million CFU costs KRW 167 per 100 million, twenty times more for the same number of bacteria.

Reading the Korean label

What can the label legally claim?

For general probiotics, the MFDS allows only one claim: "may help beneficial bacteria grow and suppress harmful bacteria, help bowel movements, and support gut health." Claims about immunity, skin, weight, or women's health require either a specific strain with its own approval or an added ingredient that carries that claim. If a name includes words like "women's" or "blood sugar care," check which ingredient the claim belongs to. For comparison, the US FDA has not approved any health claims for probiotics.

Capsules, sticks, or chewables?

There is no clear evidence that one form works better than another, so choose what is easiest for you. Flavored products such as the chocolate sticks may contain sugar, which matters if you are managing blood sugar. Powder sticks are handy if you find capsules hard to swallow.

Storing and taking them

• Keep them cool: live cultures are sensitive to heat and humidity. Korean summers are hot and humid, so do not leave them in a car or by a sunny window. If the box says 냉장보관, keep it refrigerated.
• Carrying them home: room-temperature products are fine in a suitcase for a normal trip. Many countries allow supplements for personal use, but check your own customs rules before buying in bulk.
• Space them from antibiotics: Korea's MFDS advises against taking probiotics at the same time as antibiotics, which can kill the bacteria. Two to three hours apart is the usual advice.
• Give it two to four weeks: most studies measured effects after four weeks or more. Mild gas or bloating in the first few days is common and usually passes.

How much do probiotics actually do?

Constipation is where the evidence is strongest. A meta-analysis of 14 trials in adults with functional constipation (Dimidi et al., 2014) found that probiotics increased bowel movements by about 1.3 a week, but results varied a lot by strain. The American Gastroenterological Association (2020) did not recommend probiotics for irritable bowel syndrome or inflammatory bowel disease because the evidence was too weak. Benefits for immunity or skin are still mostly at the research stage. For strain-by-strain results, see Bifidobacteria Probiotics: What the Studies Show.