— · Serum
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4.7
311 reviews
Rating breakdown
Most-mentioned keywords
Why consumers buy
Repurchase/loyalty
Many reviewers explicitly state this is their 2nd, 3rd, or even 5th+ repurchase, citing years of consistent use for damaged or dry hair.
Influencer and YouTuber recommendations
Several reviews mention buying after seeing Korean YouTubers, beauty bloggers, or 'Director Pi' recommend the product.
Sample-to-full-size conversion
A number of buyers received a small sample (often as an Olive Young gift-with-purchase) and were impressed enough to buy the full-size product.
Promotional deals (1+1, bundles)
Buy-one-get-one and double-pack promotions were frequently cited as a purchase trigger, with reviewers noting good value for the price.
Ingredient reputation
Some consumers cite the '38 types of protein' formula and clean/safe ingredient list as reasons for trust and purchase, especially for chemically damaged hair.
How they use it
Leave-in after shower
Most common usage is applying to damp/towel-dried hair right after washing, before blow-drying, often as a replacement for conditioner or treatment.
Small/pea-sized amount
Skin concerns raised — and how the product addressed them
✓Many reviewers with chemically treated or bleached hair reported softer, more manageable strands and reduced dryness after regular use.
✓Reviewers frequently note reduced frizz and smoother finish, especially in humid weather or after blow-drying.
✓The lightweight, non-oily formula was praised for not weighing down fine or thin hair unlike heavier treatments.
Points to note
Sentiment breakdown
Share of analyzed reviews by overall sentiment.
Many reviewers stress that only a small amount (pea-sized or less) is needed, especially for fine or short hair, to avoid greasiness.
Used with matching spray/mist
Some consumers pair the ampoule with the brand's protein bond spray or mist for a fuller routine.
Seasonal use for humidity/frizz control
Frequently used in summer to control humidity-induced frizz and in winter for dryness protection.
Applied to mid-lengths and ends
Reviewers with damaged or bleached hair often concentrate application on the ends rather than the scalp to avoid oiliness.
✓Some users reported easier detangling and reduced hair loss from brushing after incorporating the product into their routine.
✓Users with oily scalps generally found the product did not increase oiliness when used in small amounts, though overuse caused greasiness for some.
Concerns and outcomes summarized from reviews; percentages are approximate.
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