COSRX The 6 Peptide Skin Booster Serum Double Set (150ml+30ml)
500 Olive Young reviews read first-hand · Olive Young rating 4.8 (12,309 reviews) · 75% gentle with no irritation · 68% hydration · 54% combination skin (Olive Young official) · a first-step peptide booster serum used right after cleansing
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Community summary
The most frequently mentioned point is hydration. Comments on hydration and moisture like 'it takes care of inner dryness after cleansing' and 'skin feels moist and bouncy' were the most common, at 286 reviews. Olive Young's skin-concern metric is also 68% 'good for hydration.'
Next comes the first-step booster impression. 226 reviews mention it as a booster — 'applying it first helps the next essence and cream sink in better' and 'I use it before active products like retinol or vitamin C' — and 200 say it absorbs lightly like water with no stickiness. Mentions that skin texture feels smoother with a glow (114 reviews) and comments that makeup goes on better when it's applied before sunscreen or foundation follow. That said, these are users' own impressions.
There are many repurchase stories about being several bottles in (113 reviews) and comments on large-size value during sales (100), and most find the pump bottle convenient. On the other hand, there are reactions like 'I bought it on a YouTuber's recommendation but I'm not sure it does much' (26 reviews), a few reviews saying it stings when skin is in poor condition, and packaging complaints that the nozzle leaks or splatters.
These are counts taken directly only from reviews, out of the 500 read, where the expression appeared clearly (a single review can fall under several items). If anything, we undercounted rather than inflated — it's a minimum.
By skin type
Olive Young official attribute metrics (based on 12,309 reviews, rating 4.8; top response per axis). These are not values we assigned — they're as tallied on Olive Young.
Expressions found in the reviews read (original tone kept, not rewritten)
Strengths reviewers kept mentioning
- Hydration that fills inner dryness — the most-mentioned pointThe most frequently mentioned point (286 reviews). Comments that it takes care of inner dryness after cleansing and leaves skin moist and bouncy. It lines up with Olive Young's 68% 'good for hydration.'
- First-step booster — next steps and makeup grip226 reviews share the booster impression that applying it first helps the next essence and cream sink in better. Comments that layering it 3–5 times before sunscreen or foundation makes makeup go on better, and stories of using it before retinol or vitamin C, follow.
- Water-light absorption200 reviews say that although it's a serum, the texture is close to water, so it absorbs quickly without stickiness. Many users use it in place of a toner, and 114 mention that skin texture feels smoother.
- Pump bottle and large-size valueMany say the pump is hygienic and convenient for dispensing straight onto the face. Many repurchase stories say the 150+30ml double set is good value when bought during sales.
Downsides (mentioned repeatedly)
- 'Not sure it does much' reactions26 candid reviews say they bought it on a YouTuber's or ad's recommendation but didn't notice any particular difference using it alone. This contrasts with those who use it as an unremarkable first basic step.
- Stinging when skin is in poor conditionA few reviews say it stings when skin is sensitive or when it gets into the eyes with water right after cleansing, and there are low ratings saying breakouts appeared during use.
- Nozzle and cap inconveniencePackaging complaints recur — the pump is short, it drips or splatters from the nozzle, the cap doesn't do its job. Some transfer it to a dropper or mist bottle.
- Full price feels steepMany say the full price feels expensive, so they only buy it during Olive Young sales. Some also feel the character-figure set is unnecessary.
- Based on users' own impressionsThe hydration and booster effects are users' own impressions and vary by person. We make no efficacy claims.
Best for
- When you're looking for a first-step product to lightly fill in inner dryness right after cleansing. Hydration comments are the most common
- When you want a booster that helps the next serum and cream, and makeup, sit better
- When you're looking for a light serum you can use easily with a pump in place of a toner
- When you want a gentle base to use as the step before active products like retinol or vitamin C. 75% gentle with no irritation
May not suit you if: When you expect a clear, immediate effect from it alone. There are quite a few candid 'not sure it does much' reviews / When your skin is broken out and very sensitive. Some reviews say it stings when skin is in poor condition / When you want a bouncy, rich serum. The texture is close to water
How to Use COSRX The 6 Peptide Skin Booster Serum Double Set (150ml+30ml)
- Right after cleansing, dispense 2–3 pumps into your palm or straight onto your face and pat it in, then layer it 3–5 times when skin is dry — that's the common routine in reviews
- A recurring tip is that layering it before makeup and then applying a hydrating sunscreen or cushion improves how well makeup sits
- If dripping bothers you, a tip is to dispense it directly onto your face or transfer it to a dropper or mist bottle
- Some advise using less when skin is sensitive and avoiding the eye area
Price & buying tips
- The 150ml+30ml double set is standard, so many say it's good value for the size, and some mention it lasts 3–4 months
- Many reviews say the full price is steep so they buy it during Olive Young sales — the recurring advice is to compare the character-figure set with the regular set price, and to check the Olive Young price and the Coupang price as well Check the price on Coupang →
Compared with other Toners & pads picks
Real-user and in-store trend tally for the toner and pad category (Olive Young JJintem's own data)
See the full Toners & pads ranking →
FAQ
Q. How to use the COSRX 6 Peptide Skin Booster — when, and how many layers?
The most common routine is dispensing 2–3 pumps straight onto the face as the first step of skincare right after cleansing and patting it in to absorb. Many reviews say they layer it 3–5 times when skin is dry or before makeup. Many also use it in place of a toner or as the step before active products like retinol or vitamin C.
Q. Can I use it instead of a toner?
Because it's a light, almost water-like texture, 44 reviews say 'I use it instead of a toner.' It isn't a substitute for a wipe-off toner, but many users put it in the place of a pat-in toner. That said, some advise that dry skin should follow it with a cream.
Q. Is it true that it helps makeup go on better?
Comments that 'layering it before makeup makes makeup go on better' recur (48 reviews), and the booster impression that it helps the next steps absorb is common at 226 reviews. On the other hand, some reviews say 'I didn't really feel my makeup went on better,' so results vary by person.
Q. Does it sting on sensitive skin?
Olive Young's irritation metric is 75% 'gentle with no irritation,' and most say it's gentle. That said, a few reviews say it stings when skin is in poor condition or when it gets into the eyes right after cleansing, and some low ratings mention breakouts during use, so we recommend starting with a small amount to check how your skin reacts.
Q. Does it help with wrinkles or brightening?
Reviews mainly mention the impression that skin texture feels smoother with a glow (114 reviews), while for brightening or wrinkle improvement many react with 'not sure.' We make no functional-efficacy claims, and results vary by person.
Q. Where does it rank among Olive Young booster and toner recommendations?
In the Olive Young JJintem toner and pad tally, the COSRX 6 Peptide Skin Booster is listed as a first-step booster serum. It's a big hit with 12,309 Olive Young reviews. Rankings change depending on when they're tallied, so for the latest comparison, check the Olive Young toner and pad recommendation ranking page. We don't assign star ratings on our own.
Q. Where does the data on this page come from?
The 4.8 rating, 12,309 reviews, 75% gentle with no irritation, 68% hydration, and 54% combination skin are Olive Young's official figures, while the keyword numbers and the ★4–5 share (96%) are values we counted ourselves across 500 reviews (we counted only reviews with clear wording, so if anything they're under the real figure, not inflated). We don't reproduce the original review text — only the analysis — and we don't assign star ratings or make efficacy claims.
Starting from a viral Threads post with over 1.85M views, we collected real Korean users' recommendation comments on Olive Young posts, merged different spellings of the same product, and tallied mentions, likes, and staff endorsements. No ads or sponsorships — rankings come from real recommendation data only.
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