Best-seller reputation
Many buyers cite that it is Olive Young's top-selling enzyme in Korea, which drove first-time trial purchases.
Influencer/YouTuber recommendation
Several reviewers mention trying the product specifically after seeing it recommended by YouTubers such as Ena Jang.
Repeat/loyalty purchase
A large share of reviews state they have 'purchased this so many times I lost count,' indicating strong repurchase loyalty.
Portable individual packaging
The single-serving stick format is frequently cited as a reason to buy for travel, work, or eating out.
Sale/bulk value
Multiple reviewers say they stock up specifically when the product goes on sale due to its otherwise higher price point.