Invisible Peeling Booster
K-Beauty Gentle Exfoliation Classic
Verified reviewer
Pros & cons.
- +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
- −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
The full review.
About CNP Laboratory
CNP Laboratory is a Korean dermatologist-founded brand.
How to Use
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.
Who Should Buy
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.
Texture
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.
Common Praise
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.
Common Complaints
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.
Ingredient analysis.
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
Skin match.
The science.
The Science
The formulation uses the established evidence for polyhydroxy acids as surface exfoliants. Gluconolactone is a PHA with a larger molecular structure than glycolic or lactic acid; this size makes it gentler. Because the molecule stays shallow in the stratum corneum, it exfoliates the corneocyte surface without the inflammatory response caused by deeper AHA penetration. Peer-reviewed dermatological research shows gluconolactone exfoliates sensitive skin effectively, including studies where rosacea and atopic dermatitis patients tolerated concentrations similar to over-the-counter cosmetic products. The formula's second mechanism is the polyglutamic acid humectant complex. Polyglutamic acid is a glutamic acid polymer made via bacterial fermentation. Cosmetic research suggests it holds roughly four times more water per molecule than hyaluronic acid and sits higher in the stratum corneum. This combination matters because chemical exfoliants increase transepidermal water loss — the polyglutamic acid offsets that loss as it occurs. The tertiary layer is the mushroom extract complex, specifically Cordyceps sinensis and Trametes versicolor, which provide beta-glucans and polysaccharide antioxidants to support barrier repair. The evidence for topical medicinal mushroom extracts is less robust than for gluconolactone or polyglutamic acid, but these ingredients are well-tolerated and fit the product's role as a gentle, supportive exfoliant rather than an aggressive one.
Dermatologist Perspective
Dermatologists often recommend polyhydroxy acid products to patients who want chemical exfoliation but cannot tolerate alpha hydroxy acids. Gluconolactone has a favorable safety profile and studies in rosacea and atopic dermatitis populations show positive tolerability. Board-certified dermatologists note that PHAs are a 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 typical caveat — dermatologists usually recommend fragrance-free alternatives for patients with confirmed contact sensitivities, though the geranium oil in this booster is at a low concentration and most users tolerate it well.
Where it fits in your routine.
Apply to clean, dry skin after cleansing and toning. Sweep a soaked cotton pad gently over the face, avoiding the eye area, or press three to four drops from your palms into the skin. Use once daily to start, then move to twice daily as tolerance allows. Follow with serum and moisturizer as usual. Always finish with broad-spectrum SPF in the morning — any chemical exfoliant increases UV sensitivity. Stop use temporarily if skin shows signs of over-exfoliation like persistent redness, flaking, or stinging with other products.
At $35 for 100ml, this booster offers high value in the PHA category. The per-milliliter price is much lower than most Western chemical exfoliants. Comparable products from The Inkey List, Naturium, or Neostrata cost $15-25 for 30-50ml, making CNP roughly half the per-unit cost. The formulation is more sophisticated than a pure gluconolactone solution because it includes polyglutamic acid and mushroom extracts instead of selling them separately. CNP does not offer a larger size, but the 100ml bottle lasts most users about three months with daily facial application. The verdict: a real value in the gentle exfoliation category, especially for users who would otherwise buy separate exfoliant and humectant products.
Sensitive, combination, and normal skin types want daily, gentle chemical exfoliation without AHA-induced irritation. It works well for users with mild texture concerns, dullness, or early sun damage who cannot tolerate glycolic or lactic acid products. It also suits combination skin needing a hydrating exfoliating toner that removes the need for a separate humectant.
Avoid this formula if you have confirmed sensitivity to geranium, citronellol, or geraniol; use CosRx PHA alternatives instead. Skip this if you need aggressive exfoliation for stubborn hyperpigmentation or heavy blackhead congestion — a 2% salicylic acid or stronger AHA works better. Also skip if you prefer fragrance-free routines across your entire regimen.
Product details.
Thin, water-like essence that applies weightlessly
Soft floral geranium note
Frosted plastic bottle with flip-top cap
It feels gentle on first application with no tingling. Most users expect a typical acid experience and are surprised. Skin looks a shade brighter within a day. After a week, the 'invisible peeling' promise works; skin texture refines without visible peeling.
About 3 months with twice-daily use on face
12 months
All Year
The backstory.
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)Two Korean dermatologists, Dr. Cha Gun-young and Dr. Park Byung-gun, founded CNP Laboratory (Cha & Park) in 2000 in Seoul. The brand operates as a derm-clinic-adjacent cosmeceutical brand. CNP Laboratory sells in Korean dermatology clinics and uses evidence-based formulations, though it has less international recognition than some K-beauty peers.
Common myths.
PHAs are just weaker AHAs.
PHAs like gluconolactone have larger molecular structures that limit penetration depth. This makes them gentler, but they are not weaker. They exfoliate the surface effectively without irritating the deeper layers where AHAs cause irritation. They are mechanistically different, not just milder.
Invisible peeling means it doesn't actually exfoliate.
The name describes the lack of visible flaking and shedding. Exfoliation happens at the corneocyte level. Individual dead cells loosen and slough without the macroscopic peeling stronger acids cause. The product exfoliates; it just does so discreetly.
FAQ.
How is this different from an AHA toner like Pixi Glow Tonic?
Pixi Glow Tonic uses 5% glycolic acid to penetrate deeper and exfoliate more aggressively. CNP's booster uses gluconolactone, a larger molecule that stays near the surface for gentler exfoliation. Use Pixi Glow Tonic if your skin handles it well; use CNP's booster if Pixi Glow Tonic stings or irritates you.
Can I use this every day?
Yes, gluconolactone works for most skin types. It is gentle enough for daily use, and many users apply it twice a day. If you are new to chemical exfoliants, use it every other day for the first week and then increase frequency.
Will this cause purging?
Purging is rare with this product because the exfoliation is gentle. Some users report mild initial breakouts that clear within two weeks as the formula clears surface congestion, but most see smoother skin without a visible adjustment phase.
Is this safe during pregnancy?
Yes — gluconolactone is pregnancy-safe, and the formula lacks retinoids or high-risk actives. The geranium oil is the only ingredient to consider, but it uses a low concentration typical for cosmetic use.
Can I layer this with vitamin C?
Yes, but apply them separately. Use vitamin C first on clean skin, wait one minute, then apply this booster. The PHA preps skin for better vitamin C absorption, and the polyglutamic acid offsets mild dryness from the vitamin C.
Why does it smell like geraniums?
The formula uses pelargonium graveolens (rose geranium) essential oil for a soft floral note. CosRx's PHA Toner is a similar fragrance-free alternative without the essential oil.
Is one bottle enough for full-face and body?
100ml lasts most users about three months for facial application only. Using it on body areas like upper arms for keratosis pilaris uses the product faster — many users buy it specifically for KP and find a single bottle lasts about six weeks.
Community
What the community says.
"Genuinely gentle chemical exfoliation"
"Immediate glow and smoothness"
"Good for sensitive skin"
"Doubles as hydrating toner"
"Excellent value for 100ml"
"Contains geranium oil fragrance"
"Mild geranium scent isn't for everyone"
"Not strong enough for stubborn texture issues"
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