K-Beauty's Viral Hit KSECRET SEOUL 1988 Lands at Costco Nationwide

NEW YORK, NY – May 01, 2026 – In a move that bridges the gap between social media virality and mainstream retail, Korean skincare brand KSECRET SEOUL 1988 has officially launched in 227 Costco warehouses across the United States. The brand, which exploded in popularity on TikTok, is bringing its celebrated SEOUL 1988 Serum: Retinal Liposome 2% + Black Ginseng to American consumers, marking a significant milestone for the digitally-native company and the booming K-Beauty market.

This nationwide expansion places a product once discovered through algorithm-driven video feeds directly into the shopping carts of millions. Available both in-store and online, the serum is being offered as an exclusive 50ml double set for $35.99, a strategic price point designed to make high-performance skincare accessible to a broader audience. The launch solidifies a new, accelerated path to market for beauty brands: build a massive online following, then partner with a retail giant to achieve scale.

From Digital Fame to Retail Aisles

Since its 2024 launch, KSECRET has cultivated a massive global following, generating what the company reports as over two billion views on TikTok from nearly 400,000 user-created videos. This digital groundswell was not just a passing trend but a powerful proof of concept that captured the attention of one of the world's largest retailers.

Costco's decision to stock the brand underscores a fundamental shift in how consumer goods, particularly in the beauty sector, gain traction. The warehouse club recognized KSECRET's rapid growth not merely as a viral phenomenon but as a brand validated by a global chorus of authentic customer reviews and experiences. This partnership allows KSECRET to transcend the often-fickle world of online trends and establish a firm foothold in the competitive U.S. beauty landscape.

"We are thrilled to bring SEOUL 1988 Retinal Serum to Costco members across the United States," said Sohee Lim, Global Marketing Lead at KSECRET, in a recent press release. "Costco recognized the rapid global growth of SEOUL 1988 not simply as a viral beauty product, but as a derma skincare brand validated by real customer experiences. By bringing the dynamic beauty spirit of Seoul to consumers in the U.S. market, we hope our products transform the skincare routine into an enjoyable ritual, empowering them to feel truly confident in their natural beauty."

A New Chapter for K-Beauty in America

The arrival of KSECRET at Costco is the latest chapter in the remarkable growth story of Korean beauty in the United States. The U.S. has recently surpassed China as the top export market for South Korean cosmetics, with the American K-Beauty market valued at over $22 billion in 2024 and projected to grow at a compound annual rate of over 7%. This surge is driven by a consumer base hungry for innovation, effective ingredients, and sophisticated formulations.

KSECRET joins a growing list of successful K-Beauty brands, including COSRX, Beauty of Joseon, and Skin1004, that have leveraged online popularity to secure shelf space at major U.S. retailers like Target, Ulta, and now, Costco. This trend signals the full maturation of K-Beauty from a niche interest to a mainstream staple. Retailers are increasingly acting as curators, responding to clear consumer demand that originates and is amplified on social media platforms. For shoppers, this means that products once requiring deep-dive online research and international shipping are now readily available during a weekly grocery run.

Behind the Hype: Potent Ingredients and a Bold Promise

At the heart of KSECRET's appeal is a product that blends traditional Korean heritage with advanced dermatological science. The brand's name, SEOUL 1988, pays homage to a pivotal year when South Korea stepped onto the global stage, mirroring the brand's ambition to blend its cultural roots with modern innovation.

The star product, the SEOUL 1988 Serum, is formulated with two powerful key ingredients. The first is 2% retinal, a potent vitamin A derivative. In the world of retinoids, retinal (or retinaldehyde) is known for being more powerful and faster-acting than the more common retinol, as it requires only one conversion step in the skin to become retinoic acid, the active form that works to improve cell turnover. This can lead to quicker results in improving skin texture and reducing the appearance of fine lines. To mitigate the potential for irritation that comes with such potency, the formula utilizes liposome technology, which encapsulates the retinal to enhance stability and ensure gentle, effective delivery into the skin.

Complementing the retinal is 58% black ginseng extract. A staple in traditional Korean medicine, black ginseng is created through a meticulous process of steaming and drying fresh ginseng up to nine times. This enhances its antioxidant properties, making it a powerful ingredient for protecting the skin from environmental stressors, reducing inflammation, and supporting skin elasticity. The brand boldly claims the serum can deliver visible improvements in skin tone, fine lines, and texture within just 14 days—an ambitious timeline that speaks to its confidence in the high-potency formulation.

The Costco Effect: Democratizing Advanced Skincare

The partnership between KSECRET and Costco represents more than just a successful business deal; it signifies the democratization of advanced skincare. By offering a duo pack of a high-performance retinal serum for under $40, Costco is making ingredients once reserved for high-end, specialty boutiques accessible to the masses. This aligns perfectly with Costco's broader strategy in the beauty category: identifying products with proven quality, efficacy, and strong consumer demand, then delivering them to its members at an exceptional value.

For the American consumer, this means greater access to the innovation that has made K-Beauty a global phenomenon. The move allows shoppers to experiment with sophisticated ingredients like retinal and black ginseng without a significant financial commitment. As digitally-native brands continue to prove their market power online, their migration to the aisles of mass retailers like Costco is reshaping the beauty industry, making the journey from viral sensation to skincare staple faster than ever before.