Reputation as a gentle, effective vitamin C
Many buyers chose this over other vitamin C serums specifically because it is known for being less irritating while still delivering brightening results.
Repeat purchase / holy grail status
A large share of reviews are from customers on their 2nd through 10th bottle, describing it as their 'holy grail' vitamin C serum they keep restocking.
Influencer and word-of-mouth recommendation
Several reviewers cite YouTube influencers or Korean beauty content creators as the reason they tried the product for the first time.
Value for large volume/price
The 40ml size and 'All Young Sale' pricing are frequently mentioned as good value compared to premium vitamin C serums like SkinCeuticals.
Gifting
Some buyers purchased it as a gift for parents or friends dealing with dark spots, mole-removal recovery, or sun damage.