A gentle PHA-based exfoliating essence that has earned its decade-long cult following in K-beauty communities. Gluconolactone plus polyglutamic acid delivers surface refinement without the sting, and the 100ml size makes it one of the better values in the category. The geranium oil keeps it from being a true sensitive-skin home run, but for most users it's a quietly excellent entry point into chemical exfoliation.
Invisible Peeling Booster
A gentle PHA-based exfoliating essence that has earned its decade-long cult following in K-beauty communities. Gluconolactone plus polyglutamic acid delivers surface refinement without the sting, and the 100ml size makes it one of the better values in the category. The geranium oil keeps it from being a true sensitive-skin home run, but for most users it's a quietly excellent entry point into chemical exfoliation.
Score Breakdown
A standout gentle exfoliating booster with a smart PHA-plus-humectant combination, though the geranium oil prevents a perfect irritation-risk score for the most reactive skin types.
Data Confidence: high
This product has been on the market since around 2014 with thousands of user reviews across Korean and international K-beauty retailers and a decade of community feedback.
0/100
Overall Score
Ingredient Quality 0
Value for Money 0
Suitability Breadth 0
Irritation Risk (↑ = safer) 0
Assessment
Pros
- Gluconolactone PHA delivers genuine exfoliation without the sting of AHAs
- Polyglutamic acid adds hydration benefit most exfoliating toners lack
- Gentle enough for daily use on sensitive and combination skin
- 100ml size offers excellent value compared to most PHA products
- Medicinal mushroom extracts and beta-glucan support barrier function
- A decade of real-world use has validated the formula across diverse skin types
Cons
- Contains rose geranium essential oil which limits use for rosacea and severely sensitive skin
- Not strong enough for users with stubborn texture or significant hyperpigmentation
- Floral scent may not appeal to users who prefer unscented products
- Subtle results require patience — impact is cumulative not dramatic
Full Review
The name sounds like it was translated by a committee. Invisible Peeling Booster — is it a serum? A toner? A peel? What exactly is invisible about it? But spend five minutes with the ingredient list and the name starts making sense as a literal description. PHAs like gluconolactone exfoliate at the corneocyte level, loosening dead cells one at a time instead of stripping them off in sheets like glycolic acid can do. You never see flaking. You never feel stinging. You just wake up one morning and notice your skin looks subtly more refined than it did a week ago, and you realize the booster has been quietly working the whole time. That's the thesis of the product, and after a decade on the market it has built up enough user evidence to make the case convincingly. CNP Laboratory is a Korean dermatologist-founded brand that most Western consumers haven't heard of unless they've spent time in K-beauty subreddits. The two founders — Dr. Cha and Dr. Park — started the brand in 2000 as a clinic-adjacent cosmeceutical line, and the distribution was initially limited to Korean dermatology offices. The Invisible Peeling Booster was the product that broke out internationally, first through word of mouth on Reddit and then through influencer coverage that positioned it specifically as the gentle alternative to AHA toners for people whose skin couldn't tolerate the Pixi Glow Tonic era. That's still the core pitch and it's still accurate. The formula is more interesting than a straight PHA product needs to be. Alongside the gluconolactone, CNP adds polyglutamic acid — a plant-derived humectant that holds several times more water than hyaluronic acid — and then pairs that with panthenol, allantoin, beta-glucan, and a small payload of medicinal mushroom extracts. The effect is that the booster doubles as a hydrating essence. You're not just exfoliating; you're simultaneously plumping the freshly exfoliated surface with water-binding ingredients that prevent the dehydration a standalone PHA can cause. That's a more thoughtful approach than most exfoliating toners bother with, and it's the reason the product sits so comfortably in combination and sensitive skin routines where aggressive acids would cause problems. The texture is pure watery essence — it pours like water, absorbs like water, and can be applied either by soaking a cotton pad or by pressing it in with palms. K-beauty purists prefer the palm method because it avoids wasting product on a cotton pad, but the cotton pad approach has the added advantage of physically lifting surface debris, which some users prefer for an early-morning pick-me-up. Either way, the product disappears into skin within seconds and doesn't interfere with serums or moisturizers layered on top. Results are subtle and cumulative. After the first use, you notice a very slight glow. After a week, skin feels smoother under your fingertips and makeup applies more evenly. After a month, stubborn surface texture on cheeks and forehead has visibly improved, and blackheads on the nose are less aggressive. If you're expecting the dramatic before-and-after of a 2% BHA treatment, you'll be underwhelmed. If you're expecting the gentle, gradual improvement that a daily low-strength exfoliant is supposed to provide, you'll be satisfied. The one real complaint worth surfacing is the inclusion of pelargonium graveolens — rose geranium essential oil — at the end of the ingredient list. It's at a low concentration and most users don't experience any issue, but it does disclose as citronellol and geraniol on the allergen list, which is a reason for caution if you're severely reactive or rosacea-prone. CosRx PHA Moisture Renewal Power Cream and its companion toner offer a fragrance-free alternative for anyone who can't tolerate the geranium. Price-wise, this is one of the better deals in the PHA category. At $35 for 100ml, you're paying significantly less per milliliter than most Western PHA products, and the formulation is more sophisticated than cheaper alternatives like The Ordinary's (now-discontinued) PHA solutions. For anyone whose skin has rejected AHAs and BHAs and who wants a single leave-on exfoliating step that can be trusted to be gentle, this remains one of the best options a decade after its launch.
Formula
Ingredients
The hero actives that drive this product's performance.
| Ingredient | Function | Evidence |
|---|---|---|
| Gluconolactone (PHA) | A polyhydroxy acid that exfoliates dead surface cells with a larger molecular size than glycolic or lactic acid, which means slower penetration and dramatically less irritation — in this formula it's positioned as the whole point, letting sensitive and reactive skin get genuine chemical exfoliation without the stinging associated with AHAs. | well-established |
| Polyglutamic Acid | A plant-derived humectant that holds significantly more water than hyaluronic acid and sits above it on the surface — added here to counter the subtle dehydration a PHA can cause and to give the product its signature 'plumping' finish rather than the flat feel of a pure exfoliating toner. | promising |
| Panthenol and Allantoin | The recovery pair that makes this booster genuinely safe for reactive skin — panthenol calms surface inflammation while allantoin soothes and supports healing, buffering any micro-stress from the gluconolactone exfoliation happening underneath. | well-established |
| Cordyceps & Trametes Versicolor Extract | Two medicinal mushroom extracts that deliver beta-glucans and antioxidants — included to support barrier function while the PHA is exfoliating, and to give the formula its K-beauty ferment-adjacent positioning. | emerging |
Full INCI List · pH 4
Purified Water, Gluconolactone, Propanediol, Diethoxyethyl Succinate, Arginine, Panthenol, Butylene Glycol, Glycerin, Xanthan Gum, Allantoin, Polyglyceryl-10 Laurate, Polyglyceryl-10 Myristate, Cordyceps Sinensis Extract, Trametes Versicolor Extract, Polyglutamic Acid, Pentylene Glycol, Maltose, Sodium Hydroxide, Citric Acid, Urea, Fructose, Sodium Hyaluronate, Pelargonium Graveolens Flower Oil, Beta-Glucan, Sodium Lactate, Sodium PCA, Sodium Chloride, Trehalose, Sodium Citrate, Ethylhexylglycerin, Glucose, Sodium Benzoate, Potassium Sorbate, Disodium EDTA, Citronellol, Geraniol
Product Flags
✗ Fragrance Free✓ Alcohol Free✓ Oil Free✓ Silicone Free✓ Paraben Free✓ Sulfate Free✓ Cruelty Free✗ Vegan✗ Fungal Acne Safe
Potential Irritants
Geranium OilCitronellolGeraniol
Common Allergens
CitronellolGeraniol
Compatibility
Skin Match
Best For
Works For
Not Ideal For
Addresses These Conditions
dullness texture blackheads keratosis pilaris
Use With Caution
rosacea eczema compromised skin barrier
Routine Step
treatment
Time of Day
AM & PM
Pregnancy Safe
Yes ✓
Layering Tips
Use after cleansing as the first treatment step — either soaked on a cotton pad and swept over skin, or pressed in with palms. Follow with serum and moisturizer. Can be used both morning and evening once tolerance is established.
Results Timeline
Immediate smoothness and glow after first use; visible texture improvement after 1-2 weeks; meaningful reduction in congestion and roughness after 4-6 weeks of consistent use.
Pairs Well With
niacinamide-serumhyaluronic-acid-serumcentella-moisturizer
Conflicts With
strong-retinoidsaha-bha-stacks
Sample AM Routine
- Gentle cleanser
- CNP Laboratory Invisible Peeling Booster
- Niacinamide serum
- Moisturizer
- SPF 30+
Sample PM Routine
- Cleanser
- CNP Laboratory Invisible Peeling Booster
- Hydrating serum
- Cream moisturizer
Evidence
Science
The Science
The formulation rests on the well-established evidence base for polyhydroxy acids as surface exfoliants. Gluconolactone is a PHA with a larger molecular structure than glycolic or lactic acid, and that size difference is the mechanistic explanation for its gentler activity profile. Because the molecule can't penetrate as deeply into the stratum corneum, it exfoliates at the corneocyte surface without triggering the inflammatory response associated with deeper AHA penetration. Peer-reviewed dermatological research has documented gluconolactone as an effective exfoliant for sensitive skin types, including studies showing it is well-tolerated by rosacea and atopic dermatitis patients in concentrations comparable to those used in over-the-counter cosmetic products. The formula's second mechanism is the polyglutamic acid humectant complex. Polyglutamic acid is a polymer of glutamic acid produced through bacterial fermentation, and cosmetic research has suggested it holds roughly four times more water per molecule than hyaluronic acid while sitting higher in the stratum corneum. The combination matters because any effective chemical exfoliant also increases transepidermal water loss — the polyglutamic acid offsets that loss at the same time it's happening. The tertiary layer is the mushroom extract complex, specifically Cordyceps sinensis and Trametes versicolor, which contribute beta-glucans and polysaccharide antioxidants that support barrier repair. The evidence base for topical medicinal mushroom extracts is less robust than the evidence for gluconolactone or polyglutamic acid, but the ingredients are well-tolerated and consistent with the product's overall positioning as a gentle, supportive exfoliant rather than an aggressive one.
Dermatologist Perspective
Dermatologists frequently recommend polyhydroxy acid products as a starting point for patients who want chemical exfoliation but cannot tolerate alpha hydroxy acids. Gluconolactone in particular has a favorable safety profile and has been studied in rosacea and atopic dermatitis populations with generally positive tolerability results. Board-certified dermatologists note that PHAs are a reasonable first-line option for patients with sensitive, reactive, or barrier-compromised skin who want the texture and tone benefits of chemical exfoliation without the irritation risk of glycolic acid. The essential oil content in this specific formulation is the caveat typically raised — dermatologists commonly recommend fragrance-free alternatives for patients with confirmed contact sensitivities, though the geranium oil in this booster is at a low concentration and is well-tolerated by most users.
Guidance
Usage Guide
How to Use
Apply to clean, dry skin as the first treatment step after cleansing and toning. Either soak a cotton pad and sweep gently over face, avoiding the eye area, or dispense three to four drops into palms and press into skin. Can be used once daily to start, working up to twice daily as tolerance allows. Follow with serum and moisturizer as usual. In the morning, always finish with broad-spectrum SPF — any chemical exfoliant, even a gentle one, increases UV sensitivity. Discontinue use temporarily if skin shows signs of over-exfoliation such as persistent redness, flaking, or stinging with other products.
Value Assessment
At $35 for 100ml, this booster is one of the better values in the PHA category. Per milliliter, it's significantly cheaper than most Western chemical exfoliants — comparable products from The Inkey List, Naturium, or Neostrata typically run $15-25 for 30-50ml, which puts CNP at roughly half the per-unit cost. You're also getting a more sophisticated formulation than a pure gluconolactone solution, with polyglutamic acid and mushroom extracts bundled in rather than sold as separate products. CNP does not offer a larger size, but the 100ml bottle is generous enough to last most users about three months with daily facial application. The verdict: a genuine value play in the gentle exfoliation category, especially for users who would otherwise buy separate exfoliant and humectant products.
Who Should Buy
Sensitive, combination, and normal skin types who want daily gentle chemical exfoliation without the risk of irritation from AHAs. Especially good for users with mild texture concerns, dullness, or early signs of sun damage who haven't been able to tolerate glycolic or lactic acid products in the past. Also a strong pick for combination skin looking for a hydrating exfoliating toner that doesn't require layering a separate humectant.
Who Should Skip
Anyone with confirmed sensitivity to geranium, citronellol, or geraniol should avoid this formula and look at CosRx PHA alternatives. Skip if you need aggressive exfoliation for stubborn hyperpigmentation or heavy blackhead congestion — a 2% salicylic acid or stronger AHA will serve you better. Also skip if you prefer fragrance-free routines across your entire regimen.
Ready to try CNP Laboratory Invisible Peeling Booster?
Details
Details
Texture
Thin, water-like essence that applies weightlessly
Scent
Soft floral geranium note
Packaging
Frosted plastic bottle with flip-top cap
Finish
lightweightfast-absorbingdewy
What to Expect on First Use
Completely tingle-free on first application — most users expecting a typical acid experience are surprised by how gentle it feels. Skin looks a shade brighter within a day, and after a week the 'invisible peeling' promise starts to make sense — no peeling visible, but skin texture subtly refined.
How Long It Lasts
About 3 months with twice-daily use on face
Period After Opening
12 months
Best Season
All Year
Certifications
Cruelty-Free
Background
The Why
CNP Laboratory was founded by two Korean dermatologists in 2000 and built its reputation through clinic-based distribution. The Invisible Peeling Booster launched around 2014 and became one of the brand's biggest international sellers as K-beauty communities discovered it through Reddit and Instagram, valuing it specifically as a gentle alternative to AHA toners for sensitive skin.
About CNP Laboratory Established Brand (5–20 years)
CNP Laboratory (Cha & Park) was founded in 2000 in Seoul by two Korean dermatologists — Dr. Cha Gun-young and Dr. Park Byung-gun — and operates as a derm-clinic-adjacent cosmeceutical brand. The line is sold in Korean dermatology clinics and has a reputation for evidence-based formulations, though it's less well-known internationally than some K-beauty peers.
Brand founded: 2000 · Product launched: 2014
Myth vs. Reality
Myths
Myth
PHAs are just weaker AHAs.
Reality
PHAs like gluconolactone have a larger molecular structure that limits penetration depth, which is the reason they're gentler — not because they're weaker at their intended job. They exfoliate the surface effectively while sparing the deeper layers where AHAs cause irritation, making them mechanistically different, not just milder.
Myth
Invisible peeling means it doesn't actually exfoliate.
Reality
The name refers to the lack of visible flaking and shedding — the exfoliation happens at the corneocyte level, where individual dead cells are loosened and sloughed without producing the macroscopic peeling that stronger acids can cause. The product does exfoliate; it just does so discreetly.
FAQ
FAQ
How is this different from an AHA toner like Pixi Glow Tonic?
Pixi Glow Tonic uses 5% glycolic acid, which penetrates deeper and exfoliates more aggressively. CNP's booster uses gluconolactone, a larger molecule that stays near the surface and delivers gentler exfoliation. If your skin handles Pixi well, you don't need this; if Pixi stings or irritates you, this is the safer alternative.
Can I use this every day?
Yes, for most skin types — gluconolactone is gentle enough for daily use, and many users apply it twice a day. If you're new to chemical exfoliants, start every other day for the first week and build up from there.
Will this cause purging?
Purging is uncommon with this product because the exfoliation is so gentle. A few users report mild initial breakouts that clear within two weeks as the formula works through surface congestion, but most see smoother skin without a visible adjustment phase.
Is this safe during pregnancy?
Yes — gluconolactone is considered pregnancy-safe, and the formula contains no retinoids or high-risk actives. The geranium oil is the one ingredient to consider, though it's at a very low concentration typical for cosmetic use.
Can I layer this with vitamin C?
Yes, though apply them separately. Use vitamin C first on clean skin, wait a minute, then apply this booster. The PHA actually helps prep skin for better vitamin C absorption, and the polyglutamic acid offsets any mild dryness the vitamin C might cause.
Why does it smell like geraniums?
The formula contains pelargonium graveolens (rose geranium) essential oil, which gives it a soft floral note. If you prefer fragrance-free products, CosRx's PHA Toner is a similar alternative without the essential oil.
Is one bottle enough for full-face and body?
100ml lasts most users about three months with facial application only. If you want to use it on body areas like upper arms for keratosis pilaris, you'll go through it considerably faster — many users buy it specifically for KP and find that a single bottle lasts about six weeks in that case.
Community
Community
Common Praise
"Genuinely gentle chemical exfoliation"
"Immediate glow and smoothness"
"Good for sensitive skin"
"Doubles as hydrating toner"
"Excellent value for 100ml"
Common Complaints
"Contains geranium oil fragrance"
"Mild geranium scent isn't for everyone"
"Not strong enough for stubborn texture issues"
Notable Endorsements
Cult favorite in K-beauty communitiesFeatured in Glow Recipe founder's routine
Appears In
best pha toner best gentle exfoliator for sensitive skin best k beauty exfoliant best leave on exfoliating essence best exfoliator for dehydrated skin
Related Conditions
dullness texture keratosis pilaris dehydration
Related Ingredients
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