Whitening ingredient reputation
Consumers specifically purchased this product because of glutathione's established reputation for skin brightening and the brand's credibility in whitening formulations. Multiple reviewers note they are dedicated whitening product users who chose this after researching active ingredients.
Brand/influencer visibility
The launch of glutathione from the established brand (implied as Manyo/魔女工場) generated purchase interest, with at least one reviewer mentioning they bought it after seeing a family member use it with positive results.
Value and promotions
Multiple consumers highlighted getting a good deal or discount on the product, indicating price promotions and bundle offers (the +1.5ml×7ea format) drove purchase decisions.
Sample trial conversion
At least one consumer tried a sample version first and was impressed enough to purchase the full-size product, demonstrating effective sample-to-purchase conversion.
Acne scar and dark spot concerns
Consumers with specific skin concerns—acne scars that persisted for months and general dark spots—purchased this product targeting these visible skin issues.