Influencer and YouTuber recommendations
Many reviewers explicitly say they bought the product after seeing it recommended by YouTubers, Instagrammers, or 'Little Red Book' (Xiaohongshu) bloggers who praised it for reducing breakouts.
Word of mouth / repurchase loyalty
A large share of reviews are repeat purchases (2nd, 3rd, even 5th bottle), with customers calling it a staple they 'can't live without.'
Probiotic ingredient reputation
Buyers were drawn to the 2-billion probiotic formula specifically for its promise to balance the skin microbiome and strengthen the skin barrier.
Bundle/value deal (extra 7ml)
Several reviewers mention buying because of the good value from the added mini/extra size, calling the set 'a bargain' or 'super cost-effective.'
Gifting
At least one reviewer purchased it for a family member (sister, teenage children) after personally liking the results.