Cell Fusion C Post Alpha Cooling Skin Booster Serum (150ml+30ml)
10 Olive Young reviews read first-hand · Olive Young rating 4.5 (1,201 reviews) · 70% gentle and low-irritation · 58% soothing · 57% combination skin (Olive Young official) · the first-step booster of the cooling line
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Community summary
The most frequently mentioned point is subtle cooling and heat calming. 'It turns cool if you wait a moment after applying' and 'my skin temperature drops slightly' appeared in 7 of the 10 reviews read. That said, as in the comparison 'about 30–40% of the cooling of the original blue pad,' there's a nuance that the cooling isn't as strong as the pad. The Olive Young official attribute is also 58% good for soothing.
Next come texture and gentleness. 'It says serum, but it's a watery texture as thin as a toner' and 'it absorbs fast without stickiness, so the next step doesn't pill' appeared in 6 reviews, and 'gentle with no irritation, no breakouts' in 6. Olive Young's official irritation metric is 70% gentle and low-irritation, and for skin type, 57% good for combination skin.
A distinctive point is using it in combination with the cooling line. 4 reviews describe applying it as the first step before the cooling pad or mask, or layering it several times. On the other hand, there's disappointment that 'I can barely feel the cooling' (4 reviews) and 'dry skin feels dry with this alone' (3 reviews), so it may not suit you if you expect strong cooling or standalone moisturizing. The sample read is 10 reviews, so treat the figures as a trend only.
These are counts taken directly only from reviews, out of the 10 read, where the expression clearly appeared (one review can fall under several items). The sample is small, so treat it as a trend only. If anything, we undercounted rather than inflated — it's a minimum.
By skin type
Olive Young official attribute metrics (based on 1,201 reviews, rating 4.5; multiple responses allowed). 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
- Subtle cooling — the most-mentioned pointThe most frequently mentioned point (7 of the 10 reviews read). People say their skin temperature drops slightly a moment after applying. Olive Young official 58% good for soothing. That said, these are users' own impressions.
- Watery toner texture — fast absorptionA serum that's as thin as a toner, sinks in quickly without stickiness, and doesn't make the next skincare or makeup step pill (6 reviews).
- Gentle with no irritation6 reviews say it was gentle, with no breakouts, redness, or itching. Olive Young official 70% gentle and low-irritation.
- First step of the cooling lineUsers say that applying it as the first step before the cooling pad or mask, or layering it several times, makes skin more moisturized and cooler (4 reviews).
Downsides (mentioned repeatedly)
- Cooling is weaker than the cooling pad4 reviews say 'I can barely feel the cooling' or 'about 30–40% of the pad.' If you expect cooling on the level of the Cell Fusion C Cooling Pad, you may be disappointed.
- Not enough moisture alone for dry skinBecause it's a light, watery texture, 3 reviews say dry skin feels dry with this alone. The advice is to layer a cream or ampoule.
- Small sample readOnly 10 reviews were readable, so treat the keyword percentages as a trend only. The rating and attributes are Olive Young official values based on 1,201 reviews.
- Based on users' own impressionsCooling and soothing are users' own impressions and vary by person. We make no efficacy claims.
Best for
- When you're looking for a watery booster that sinks in lightly as the first step after cleansing
- Dehydrated-oily or combination skin that heats up easily. Olive Young 57% good for combination skin
- When you want to layer it with the Cell Fusion C Cooling Pad and mask from the same line
- When you're looking for a gentle, non-irritating first-step product. 70% gentle and low-irritation
May not suit you if: When you expect strong, unmistakable cooling like the cooling pad / Dry or very dry skin that wants to finish moisturizing with a single product / When you expect a dense serum texture. The actual texture is closer to a toner
How to Use Cell Fusion C Post Alpha Cooling Skin Booster Serum (150ml+30ml)
- The order that recurs in reviews is to apply it as the first step right after cleansing, then follow with the cooling pad or an ampoule
- Some advise layering it several times for dehydrated-oily skin or in summer, and adding a cream for dry skin or in winter
- Some also soak a cotton pad with it and leave it on the cheeks briefly like a mask
- If you want more cooling, pairing it with a refrigerated cooling pad is mentioned
Price & buying tips
- The standard set is the 150ml full size with a 30ml mini attached, so some reviews look at value for the volume, and some mention using the mini for travel
- Many say they bought it when Olive Young live streams or sales included freebies, so the recurring advice is to compare the Olive Young event price and the Coupang price before buying 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 Cell Fusion C Skin Booster — when and how do I apply it?
In the reviews, the most common use was applying it as the first step right after cleansing. Since it's a thin, watery texture, people pat it in by hand or soak a cotton pad and leave it on like a mask. Following up with the cooling pad, an ampoule, and a cream is a recurring combination, and there's advice that dry skin should always layer a cream.
Q. Is it as cooling as the cooling pad?
No. Many say it's 'subtly cool,' but 4 reviews (out of 10 read) said 'about 30–40% of the pad' or 'I can barely feel the cooling.' A recurring view is that if you want strong cooling, it's better used together with the Cell Fusion C Cooling Pad.
Q. Is it a serum or a toner?
It's called a serum, but many reviews describe it as 'a watery texture as thin as a toner' or 'somewhere between a toner and a serum.' Many say it absorbs quickly without stickiness and works well as a first-step booster, but if you expect a dense serum texture it may feel different.
Q. Is it okay for sensitive skin?
'Gentle with no irritation' and 'no breakouts or redness' came up in 6 of the 10 reviews read, and Olive Young's official irritation metric is 70% gentle and low-irritation. That said, results vary by person, so start with a small amount to see how your skin reacts. We make no safety guarantees.
Q. Does it suit dry skin?
Because it's a light, watery texture, 3 reviews said 'dry skin feels dry with this alone.' Olive Young's official skin type is 57% good for combination skin, leaning toward combination. If you have dry skin, we suggest using it as a first step on the assumption that you'll layer a cream.
Q. Where does the data on this page come from?
The 4.5 rating, 1,201 reviews, 70% gentle and low-irritation, 58% good for soothing, and 57% good for combination skin are Olive Young's official figures, while the keyword numbers are values we counted ourselves by reading 10 reviews first-hand (the sample is small, so treat it as a trend only). 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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