Using 70% birch sap as the base instead of water gives this lotion a functional vehicle rather than an inert one. While most lightweight lotions are essentially water with a few actives dissolved in it, every drop of this formula starts with a mineral-rich, anti-inflammatory liquid that's doing work before the actives even enter the picture.
A pioneering oil-free moisturizer built on 70% birch sap that proved lightweight hydration and real skin benefits aren't mutually exclusive. The original formula's essential oils were its Achilles heel — irritating for the very sensitive skin types that oil-free products often attract. COSRX listened, reformulated, and the newer Birch Sap version is the better buy today. But this original earned its reputation honestly.
The case for it
What would change this: A declared concentration would move this to a firmer reading of the dose.
Same rule for everyone. “Good choice” is the verdict on 9,564 of 45,024 concern verdicts across the catalog; rule R5 decided 9,072 of them. Unchanged since September 5, 2026, engine 5.1.1.
Brand or formulator? Disclose a concentration or correct a fact →
The studies behind the evidence row
The case for it
Cautions: fragrance.
What would change this: A researched evidence row for the lead active would replace this with a verdict.
Same rule for everyone. “Supporting role” is the verdict on 8,197 of 45,024 concern verdicts across the catalog; rule R8 decided 4,250 of them. Unchanged since September 5, 2026, engine 5.1.1.
Brand or formulator? Disclose a concentration or correct a fact →
Also listed for Excess Oiliness — the actives here (Botanical Extracts, Hyaluronic Acid, Allantoin, Panthenol (Vitamin B5) are in our research queue for that concern; there is no verdict until their evidence rows are written. That is a gap in our table, not a mark against the product.
Does the jobDoes what a moisturizer is for: draws in water, softens and smooths.
A verdict is DermApproved’s assessment of how well a product’s ingredients fit a concern — never a claim about what the product treats. Evidence dots and collected reviews sit beside it and are never blended in. Rules 0.5.1 · evidence table ev-2026.09-r228 · how we decide
The COSRX Oil-Free Ultra-Moisturizing Lotion launched in 2016 with a premise that sounded like marketing until you thought about it for a moment: what if you replaced the water in a moisturizer with something that actually did something? Birch sap — the nutrient-rich liquid tapped from Betula platyphylla japonica trees — became the answer. At 70% of the formula, it's not a garnish. It's the foundation.
Birch sap is rich in minerals, amino acids, and organic acids that standard purified water simply doesn't contain. Research has begun validating what traditional Korean and Nordic medicine has long claimed: a 2023 clinical study demonstrated birch juice's ability to reduce skin nerve sensitivity, and a 2025 study confirmed its capacity to significantly reduce inflammatory cytokines in cellular models. When your moisturizer's base is anti-inflammatory before you even get to the active ingredients, you're starting from a better place than a product that begins with inert water. "Fancy water" is the standard dismissal, and it's the wrong one — the point of birch sap is precisely that it isn't water at all.
The original formula paired this intelligent base with a functional but somewhat contradictory ingredient set. Glycerin, panthenol, sodium hyaluronate, and allantoin provided the hydrating and soothing backbone — all excellent choices for an oil-free moisturizer targeting oily and combination skin. Dimethicone, listed fourth, added the occlusive layer that oil-free formulas need to prevent hydration from evaporating. Betaine contributed osmotic moisture retention, and sodium lactate — a natural moisturizing factor component — rounded out the water-binding bench. A pair of olive-derived emulsifiers, cetearyl olivate and sorbitan olivate, hold the emulsion together with unusual mildness.
That combination also quietly refutes the persistent belief that a moisturizer needs oil to moisturize. Hydration has three mechanisms — attract, bind, seal — and oils address only the last of them. Humectants like glycerin and hyaluronic acid do the attracting and binding; a silicone can do the sealing perfectly well without contributing a single drop of lipid. Oil-free is not a compromise so much as a different route to the same destination, and for skin already producing plenty of its own sebum it is arguably the more sensible one.
And then there were the essential oils. Lemon peel oil and tea tree leaf oil were included, presumably for antibacterial benefits and scent. In an oil-free moisturizer designed for acne-prone skin — a population that disproportionately includes people with sensitive, reactive complexions — this was a curious choice. Tea tree has legitimate antimicrobial credentials, but the concentration in a leave-on moisturizer, combined with the phototoxicity risk of lemon peel oil, created an irritation liability that undercut the formula's otherwise gentle profile.
COSRX eventually acknowledged this tension. The product was reformulated as the 'with Birch Sap' version, which replaced the essential oils with 4-terpineol — an isolated component of tea tree oil that provides antimicrobial activity without the full essential oil's irritation baggage. The reformulation was the right call, and it's worth knowing that the original described here is now effectively a historical document: what's on shelves today is the cleaner version.
But the original deserves credit for what it got right. The texture is genuinely remarkable. This is a moisturizer that practically vanishes on contact — it starts as a gel-cream, turns watery upon spreading, and absorbs within seconds to leave skin feeling like you applied nothing at all. For oily skin types who've spent years dreading the greasy, heavy feeling of traditional moisturizers, this disappearing act is liberating. You get hydrated skin without any perceptible layer sitting on top of it. It can be disconcerting at first if you're accustomed to feeling your moisturizer working; the absence of sensation is the product doing its job, not failing to.
The pump dispenser is a small but meaningful design win. Two pumps is enough for the full face, and the mechanism prevents the over-dispensing that squeeze tubes and jar products encourage. The slim bottle is travel-friendly and fits easily into any skincare shelf.
Performance-wise, the lotion delivers on its core promise: oil-free hydration that doesn't contribute to shine. Oily and combination skin types consistently report that their skin feels balanced — hydrated without the midday grease that heavier moisturizers cause. The birch sap and allantoin combination provides a noticeable soothing effect, particularly for post-treatment skin or mild irritation, and it's this soothing quality that takes three to four weeks to fully declare itself, well after the hydration has become routine. It's pregnancy-safe, layers cleanly under sunscreen, and pairs naturally with the BHA treatments that COSRX built its reputation on — hydrating the skin those acids leave thirsty.
The limitation is equally consistent: this is not enough moisturizer for dry skin. In cold, dry climates or for anyone with genuinely dry skin, this lotion feels like a pleasant but insufficient gesture. It needs a heavier cream layered over it, or you need to accept that it's a hydrating prep step rather than a complete moisturizer. For its intended audience — oily and combination skin, particularly in warm or humid conditions — it works beautifully on its own. One further caveat from the reviews worth taking seriously: the dimethicone sitting fourth in the deck occasionally aggravates closed comedones, and the formula is not fungal-acne safe.
At $25 retail for 100ml, the price is moderate. K-beauty retailers frequently offer it at $16-19, which represents genuine value for a birch-sap-based formula. A 20ml mini size exists for those who want to test before committing. The 100ml pump bottle lasts two to three months with twice-daily facial use. The sheer weight of feedback — some 12,000 reviews averaging 4.4 — makes this one of the better-evidenced products in the K-beauty moisturizer category, and the recurring praise is remarkably specific: it disappears, and oily skin stays matte.
The COSRX Oil-Free Ultra-Moisturizing Lotion — in either its original or reformulated version — proved that lightweight, oil-free moisturizers could be more than just watered-down face cream. The birch sap base was genuinely innovative, and the hydrating ingredient set delivers real results for oily skin. If you're shopping today, go for the reformulated Birch Sap version — it's the same good idea with the problematic essential oils removed. But this original formula earned its place in the K-beauty pantheon by demonstrating that even the base ingredient in a moisturizer could be an active.
The hero actives that drive this product's performance.
| Ingredient | Function | Evidence |
|---|---|---|
| Betula Platyphylla Japonica Juice (Birch Sap) (70%) | The formula's base at 70% concentration, birch sap replaces water as the primary vehicle. Rich in minerals, amino acids, and antioxidants, it provides anti-inflammatory benefits while delivering lightweight hydration. A 2023 clinical study demonstrated birch juice's ability to reduce skin nerve sensitivity, and a 2025 study confirmed its capacity to attenuate inflammatory cytokines — making it an active vehicle rather than an inert one. | Not yet assessed |
| Panthenol (Vitamin B5) | Supports the birch sap's hydrating action by reducing transepidermal water loss and promoting barrier repair. In this lightweight lotion format, panthenol provides the moisture-retention backbone that prevents the fast-absorbing formula from evaporating too quickly. | Established mechanism for Dehydration · established mechanism |
| Sodium Hyaluronate | A humectant that draws and holds moisture in the skin, working alongside the birch sap and glycerin to create a multi-layered hydration system. In this oil-free formula, sodium hyaluronate helps compensate for the absence of occlusive oils by binding water molecules directly to the skin's surface. | Established mechanism for Dehydration · established mechanism |
| Allantoin | Provides soothing, anti-irritant properties that complement the birch sap's anti-inflammatory action. Particularly relevant in this formula given the presence of potentially sensitizing lemon peel and tea tree oils — allantoin helps buffer their irritation potential. | Not yet assessed |
Ingredient standings describe the active at treatment-level doses and vehicles; this product's own condition grades weigh its actual formula.
Betula Platyphylla Japonica Juice, Butylene Glycol, Glycerin, Dimethicone, Betaine, Cetearyl Alcohol, 1,2-Hexanediol, Cetearyl Olivate, Sorbitan Olivate, Hydroxyethyl Acrylate/Sodium Acryloyldimethyl Taurate Copolymer, Ethylhexylglycerin, Citrus Medica Limonum (Lemon) Peel Oil, Allantoin, Panthenol, Xanthan Gum, Sodium Lactate, Sodium Hyaluronate, Ethyl Hexanediol, Melaleuca Alternifolia (Tea Tree) Leaf Oil
moisturizer
AM & PM
Apply 1-2 pumps after toner and serum. The lightweight texture absorbs quickly, making it an excellent base for sunscreen in the AM. For dry skin, layer a heavier cream on top. For oily skin, this may be sufficient as a standalone moisturizer.
Immediate lightweight hydration and soft, non-greasy feel from first use. Within 1-2 weeks, skin should feel more balanced — hydrated without excess oiliness. The birch sap's soothing benefits become more apparent after 3-4 weeks of consistent use.
The formula's foundation is 70% Betula platyphylla japonica juice (birch sap), making the vehicle itself a bioactive ingredient rather than inert purified water. Birch sap contains a complex matrix of minerals (calcium, magnesium, potassium), amino acids, organic acids (malic acid, succinic acid), and polyphenolic compounds. A 2023 clinical study published in PMC demonstrated that birch juice spray reduced sensitivity of skin sensory nerves after 2-4 weeks of topical use, providing evidence for the sap's soothing properties. A 2025 study in MDPI's Cosmetics journal found birch sap significantly reduced inflammatory cytokines (IL-1β, IL-6, IL-8) and attenuated both MAPK and NF-κB phosphorylation pathways in cellular and animal models, confirming its anti-inflammatory mechanism at the molecular level.
Panthenol's contribution to this formula is supported by extensive research. Proksch et al.'s 2017 review documented 70 years of evidence for dexpanthenol's moisturizing, barrier-enhancing, and anti-inflammatory properties. In an oil-free formula that relies on humectant rather than occlusive hydration, panthenol's ability to reduce transepidermal water loss is particularly valuable.
Sodium hyaluronate provides humectant hydration at the skin surface, while betaine — a naturally occurring osmolyte — helps cells maintain their water content under osmotic stress. Together with glycerin, these humectants create a multi-pathway hydration system that compensates for the absence of occlusive oils. Dimethicone provides the necessary occlusive component, creating a breathable silicone film that prevents excessive moisture evaporation without the heaviness of traditional oil-based occlusives.
Dermatologists frequently recommend oil-free moisturizers for patients with oily, acne-prone skin, and the concept of using birch sap as a bioactive base aligns with the trend toward functional cosmetic vehicles. Dermatology professionals find that the original formula's inclusion of lemon peel oil — a known phototoxic ingredient — was a suboptimal choice in a product likely worn during the day. The reformulated version addresses this concern. Dermatologists appreciate the panthenol and allantoin for their proven barrier-supporting properties and would recommend this lotion as a lightweight hydration step for patients who avoid oil-based products.
After cleansing, toning, and applying any serums, dispense 1-2 pumps and apply to face and neck. Pat gently to help absorption — the lightweight texture needs no rubbing. In the AM, follow with sunscreen. In the PM, this can be the final step for oily skin, or layer a heavier cream on top for dry skin types. Use morning and evening for consistent hydration without oiliness.
At $25 retail for 100ml, this lotion is reasonably priced for a birch-sap-based formula. The real value emerges at K-beauty retailer pricing ($16-19), where it becomes an accessible daily moisturizer for oily skin. A 20ml mini at $6-8 reduces the risk for first-time buyers. With two pumps per application and twice-daily use, the standard bottle lasts 2-3 months, bringing the daily cost to approximately $0.30-0.40. COSRX's established track record and the product's decade-long review history support the price.
Oily and combination skin types who need lightweight, non-greasy hydration that won't contribute to midday shine or clog pores. Ideal for warm-weather routines, under sunscreen and makeup, and for anyone who finds traditional moisturizers too heavy. Also good for acne-prone skin seeking oil-free options.
Those with sensitive skin or essential oil sensitivities should skip this original formula and opt for the reformulated Birch Sap version instead. Dry skin types will find this insufficient as a standalone moisturizer. Anyone concerned about dimethicone and closed comedones should patch test first.
Ready to try COSRX Oil-Free Ultra-Moisturizing Lotion?
Buy at Amazon ♥Lightweight gel-cream consistency that turns watery upon spreading. Silky and fast-absorbing with a barely-there feel on skin.
Noticeable herbal scent from the lemon peel oil and tea tree leaf oil. Not overpowering but detectable.
Tall, slim white plastic bottle with a pump dispenser. Minimalist COSRX branding. The pump provides precise, hygienic dispensing.
Expect a lotion that practically disappears on contact. The watery-gel texture feels like almost nothing on skin, which can be disconcerting if you're used to richer moisturizers. Skin feels soft and lightly hydrated without any greasy residue. The herbal scent from the essential oils is noticeable but fades within minutes.
2-3 months applied morning and evening facial use
spring summer
Launched in 2016 as COSRX's answer to the oily-skin moisturizer gap, this lotion became a staple for people who needed hydration without oil. The original formula's essential oils proved divisive — loved by some for the herbal scent, criticized by others for the irritation risk. COSRX eventually reformulated it as the 'with Birch Sap' version, removing the lemon and tea tree oils in favor of isolated 4-terpineol.
COSRX was founded in 2013 in South Korea and has become one of K-beauty's most trusted brands. This product has been reformulated and replaced by the 'with Birch Sap' version, which removed the essential oils. The original version built a loyal following before the reformulation.
Oil-free moisturizers can't provide real hydration — you need oils to moisturize.
This lotion uses glycerin, sodium hyaluronate, panthenol, and betaine — all proven humectants that attract and hold water without any oils. Dimethicone provides the occlusive layer that prevents moisture loss. Oil-free formulations can hydrate effectively; they just achieve it through humectant and emollient pathways rather than occlusive oils.
Birch sap is just fancy water — it doesn't do anything special.
Birch sap contains minerals, amino acids, and bioactive compounds that standard water lacks. Research has demonstrated its anti-inflammatory effects — a 2025 study showed birch sap significantly reduced inflammatory cytokines, and a 2023 clinical study demonstrated its ability to reduce skin nerve sensitivity. It's not just water in a different bottle.
The original formulation containing lemon peel oil and tea tree leaf oil has been discontinued. It has been replaced by the 'with Birch Sap' version, which removes the essential oils and uses 4-terpineol instead. The new version is the same concept — 70% birch sap, oil-free, lightweight — but with a cleaner, fragrance-free ingredient profile.
This lotion was designed for oily and combination skin types. For dry skin, it will likely feel insufficient as a standalone moisturizer, especially in cold or arid climates. You can use it as a lightweight hydrating layer and follow with a richer cream, but there are better primary moisturizers for dry skin.
Yes — dimethicone is the fourth ingredient. It creates a smooth, protective layer that helps lock in moisture without adding oil. Most users tolerate dimethicone well, but those prone to closed comedones or who prefer silicone-free products may want to consider alternatives.
Yes, many users enjoy this as a lightweight body lotion, particularly in warm weather. However, the 100ml size depletes quickly with body use. The reformulated 'with Birch Sap' version may be more practical for body application due to its cleaner ingredient profile.
COSRX removed the lemon peel oil and tea tree leaf oil — both potential irritants — to make the product suitable for a wider range of skin types, including sensitive skin. The reformulation reflects the brand's ongoing commitment to eliminating unnecessary irritants from their formulations.
Recurring themes our editors read across retailer reviews of this product — summaries in our words, not quotations, and not a substitute for your own patch test.
Extremely lightweight and non-greasy — absorbs almost instantly
Keeps oily skin hydrated without adding shine or heaviness
Works perfectly as a makeup base without pilling
Calms and soothes irritated skin with birch sap base
Pump dispenser is hygienic and precise
Good value when purchased from K-beauty retailers at $16-19
Not moisturizing enough for dry skin, especially in winter months
Contains lemon peel oil and tea tree oil that can irritate sensitive skin
Dimethicone (4th ingredient) may aggravate closed comedones in some users
100ml bottle runs out relatively quickly with twice-daily face and body use
Original formula discontinued — now only available as the reformulated Birch Sap version
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