Acne and sensitivity management
Consumers bought this tonic specifically to address acne breakouts, pimples, and irritated skin. Many mentioned using it for teenagers' acne or as a family member's recommendation for problematic skin.
Brand and ingredient trust
Multiple reviews reference prior positive experiences with other ISOI products (blue mask pack, serums, emergency line), driving repeat purchases of this tonic as part of trusted brand loyalty.
Transition from harsh Western brands
At least one reviewer explicitly stated moving away from American acne brands due to harsher chemicals, seeking gentler Korean alternatives like this product.
Repeat purchase and loyalty
Several customers noted buying their 2nd, 3rd, or subsequent bottles, indicating satisfaction strong enough to sustain repurchasing over years.
Seasonal and situational need
Summer oil increase and occasional breakouts prompted purchases, suggesting consumers use this as both preventive and responsive skincare.