Korean Miero Cider Launch Goes Viral

Miero Fiber, the dietary fiber beverage from Hyundai Pharmaceutical, has been a staple in South Korea since 1989. The brand name itself is a portmanteau of "Mi," the Korean word for beauty, and "fiber," reflecting its long-standing "healthy beauty" marketing focus. Over its 37-year history, Miero Fiber has sold over 2.3 billion bottles (based on the 100ml equivalent) and has continuously evolved its product line to meet changing consumer tastes. This includes introducing larger PET bottles for convenience, a "Sparkling Zero Sugar" version in 2023 to cater to the "healthy pleasure" trend, and even a "Salt Lemon" flavor in 2025. The recent social media frenzy is tied to the launch of a brand new product: "Miero Saida Energy." "Saida" is the Korean word for "cider," and this new beverage is an energy drink spin-off of the classic Miero Fiber, containing dietary fiber, high caffeine, taurine, and L-arginine. This new "Miero Cider" is being launched exclusively at the CU convenience store chain, leveraging a "buy-one-get-one-free" promotion throughout March to generate buzz. The launch also cleverly taps into a pre-existing "Iero Saida" YouTube meme that was already popular among Millennials and Gen Z, helping to fuel its viral spread. Hyundai Pharmaceutical has a history of successful viral marketing, including a 2012 campaign with actress Kang Min-kyung that garnered over a million views on community sites. More recently, a 2025 digital ad campaign with singer Kim Wan-sun, which remixed her hit song, achieved over 15 million views and boosted sales of Miero Fiber Sparkling Zero to over 12 million bottles. This move into the energy drink market with "Miero Saida Energy" is part of a broader strategy to appeal to younger consumers, referred to as the "Zalpha generation." In 2025, the company also launched "Miero Fiber Kids" and a "Miero Fiber Zero Sugar" to cater to a wider range of age groups and health-conscious consumers.