“The ‘DUOLAC X Son Suk-ku’ effect worked!”

Cell Biotech’s powerful probiotic brand DUOLAC has surpassed 12 million cumulative YouTube views just two months after releasing its new TV commercial. The campaign, launched in September and featuring actor Son Seok-koo, has drawn significant attention online, with consumers and communities responding enthusiastically—many noting that “survivability is the new trend in probiotics.”

The newly released TV CF centers on the slogan “221 Times Stronger Probiotics, DUOLAC.” Unlike typical probiotic products that focus solely on colony-forming units (CFU), the ad highlights a more essential point: how many probiotics actually survive in the gut. DUOLAC’s exclusive Dual Coating Technology delivers up to 221 times higher survivability, a message conveyed through clear and intuitive visuals that reinforce the brand’s technological edge and premium positioning.

The campaign has driven notable improvements across key performance metrics. DUOLAC Mall saw a sharp increase in new customers, accompanied by a rise in repurchase rates. In the third quarter—when the TV CF was released—Cell Biotech’s sales grew 26.3% year-over-year, suggesting a direct impact from the campaign. Actor Son Seok-koo’s trustworthy and solid image also created strong synergy with the “Strong Probiotics” message, contributing to tangible purchase conversion.

The “DUOLAC × Son Seok-koo Bus Ad Proof Event,” launched alongside the TV CF, also recorded high engagement. Buses across major areas of Seoul featured DUOLAC ads with Son Seok-koo, prompting an SNS photo-certification challenge that quickly went viral. The Son Seok-koo keyring merchandise offered as event prizes also gained immense popularity, with the prepared quantity selling out early.

A Cell Biotech spokesperson stated, “Actor Son Seok-koo’s strong yet warm image resonated deeply with DUOLAC’s premium technological strengths, particularly the exceptional survivability achieved through our Dual Coating Technology.” They added, “We will continue expanding DUOLAC’s technology-driven ‘Strong Brand Message’ to global markets through diverse campaigns.”