Beta-Glucan Does Niacinamide's Job Without the Marketing Budget
It hydrates, calms, and quietly supports the barrier with one of the better safety records in skincare. So why has almost nobody heard of it?
Good choice for Dehydration
What Makes This Different
Most hydrating toners lean on glycerin and hyaluronic acid alone. This one puts dimethyl sulfone (MSM) high in the formula as a soothing anchor and layers beta-glucan, licorice, and centella on top — a distinctly K-beauty take on the 'prep' category that treats toner as a treatment step, not a tightener.
Dear, Klairs
Dear, Klairs Supple Preparation Facial Toner Review
K-Beauty Gateway Toner
toner liquid k beauty Paraben Free Cruelty Free Vegan
Klairs built its reputation on this toner, and a decade later it still earns its place in K-beauty rotations. The formula puts MSM, beta-glucan and centella to work as a genuine first-step treatment rather than an astringent splash — skin feels plumper immediately. The essential oil blend is the one caveat that keeps it from being a universal recommendation.
Made in South Korea Launched 2015 All-year use PAO: 12 months
Run it through our tools Clashes with my routine? Pregnancy-safe? Find a cheaper dupe Patch-test it first
Verdicts All dehydration products →All dullness products →All compromised skin barrier products →
How well it fits each concern
Verdict by concern tap a concern for the case
Good choicefor DehydrationIn your profileYou chose · Hyaluronic Acid is a reference standard by mechanism for dehydration; this liquid carries it.
The case for it
- Sodium Hyaluronate has trial-supported standing for this concern.
- It is plausibly present at a working level, though the concentration is not declared.
- The formula carries no trigger this concern is sensitive to, with the cautions noted.
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 →
Show the work
- Rule
- R5 — Trial-supported or guideline-supported active, adequately or plausibly dosed. · the full register
- Carrying active
- Sodium Hyaluronate
- Standing
- supported — its mechanism is established
- Form
- plausible — studied range 0.1%, from the trials on the row; needs leave-on contact; judge it after ~1 weeks
- Tolerability
- standard
- Row checked
- against its sources on July 17, 2026 (evidence table ev-2026.09-r228)
The studies behind the evidence row
- Draelos ZD, Cosmetic Dermatology: Products and Procedures — hyaluronic acid classified as a humectant water-binding agent holding many times its weight in water — reference work
Promisingfor DullnessIn your profileYou chose · Hyaluronic Acid has trial-level evidence for dullness but no guideline or regulatory standing yet — promising, short of a recommendation; the other actives here are not yet assessed for it.
The case for it
- Sodium Hyaluronate has trial-level evidence for this concern but no guideline or regulatory standing yet.
- It is plausibly present at a working level, though the concentration is not declared.
- The formula carries no trigger this concern is sensitive to, with the cautions noted.
What would change this: A declared concentration would move this to a firmer reading of the dose.
Same rule for everyone. “Promising” is the verdict on 7,858 of 45,024 concern verdicts across the catalog; rule R9p decided 7,858 of them. Unchanged since September 5, 2026, engine 5.1.1.
Brand or formulator? Disclose a concentration or correct a fact →
Show the work
- Rule
- R9p — 0.5.0: 'Unproven' beside three filled dots read as one question answered twice with opposite words (7,018 rows). The chip measures standing, the dots measure trial volume; where the row carries at least one RCT or a tier-2 source (moderate dots) and the active is present at a working level, the honest word is Promising. Unproven is reserved for plausible-standing rows with limited or weak evidence, or an under-dosed form. Same rank as Unproven — a bet either way; the dots order them. · the full register
- Carrying active
- Sodium Hyaluronate
- Standing
- plausible — trials support it
- Form
- plausible
- Tolerability
- standard
- Row checked
- against its sources on July 17, 2026 (evidence table ev-2026.09-r228)
The studies behind the evidence row
- Benefits of topical hyaluronic acid for skin quality and signs of skin aging: From literature review to clinical evidence — Dermatologic Therapy (2022), opened July 16, 2026
Avoidfor Compromised Skin BarrierIn your profileYou chose · This formula carries fragrance — a known trigger for compromised skin barrier — so it is not a fit however good its actives are.
The case for it
- Dimethyl Sulfone has no evidence row yet for this concern — it is in the research queue.
- The formula carries a known trigger for this concern, which decides the verdict before any efficacy question.
Cautions: known irritants.
What would change this: Removing the trigger named above would let the actives be judged on their own.
Same rule for everyone. “Avoid” is the verdict on 1,909 of 45,024 concern verdicts across the catalog; rule R1 decided 1,304 of them. Unchanged since September 5, 2026, engine 5.1.1.
Brand or formulator? Disclose a concentration or correct a fact →
Show the work
- Rule
- R1 — Safety outranks praise (MASTER-PLAN §1.7). A condition-weighted trigger (multiplier ≥ 2 in condition-fit-matrix) decides the verdict before any efficacy question. · the full register
- Carrying active
- Dimethyl Sulfone
- Standing
- not assessed
- Form
- plausible
- Tolerability
- harsh — fragrance load
Does the jobDoes what a toner is for: adds something real, not alcohol-driven. Not measured from the label: restores skin pH, plays well with what follows.
Where our review and the verdict differ. The review below was written on the formulation and the published trials; the verdicts above apply the stricter standing test in our methodology — an active earns a recommendation only with guideline or regulatory standing for the concern. Where the two disagree, the verdict is DermApproved’s position.
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
Assessment
Pros & Cons
Pros
- ✓ Unusually high MSM content adds soothing benefit beyond basic hydration
- ✓ Leaves skin cushiony and non-tacky, unlike most humectant toners
- ✓ Thoughtful blend of centella, licorice and beta-glucan for calming
- ✓ Excellent value at roughly $22 for 180ml with 3-4 month duration
- ✓ pH around 5.0 plays well with follow-up actives like retinol or acids
- ✓ Cruelty-free and vegan formulation from an established K-beauty brand
- ✓ Proven track record with nearly a decade of community validation
Cons
- ✗ Contains lavender, ylang ylang and citrus essential oils that can irritate reactive skin
- ✗ Scent version unsuitable for rosacea or known fragrance sensitivities
- ✗ No larger size option for heavy users who burn through quickly
- ✗ Active ingredients like sodium ascorbyl phosphate are at low concentrations
- ✗ Flat pour cap means harder to control dispensing than a pump
Review
Full Review
Before Supple Preparation, most people outside Korea assumed a toner's job was to strip whatever the cleanser missed and tighten pores with alcohol. Klairs released this bottle in 2015 and a cluster of early K-beauty YouTubers — Liah Yoo, Gothamista, Lab Muffin — started showing viewers that a toner could actually be a hydrating treatment step. The word 'preparation' in the name isn't marketing filler; it's a direct translation of the Korean routine philosophy, where the toner's whole purpose is to leave skin damp and permeable so the essence and serum that follow have something to grip.
Ten years on, the formula has aged surprisingly well. Dimethyl sulfone — MSM — sits unusually high on the ingredient list, which is the first clue this isn't a standard glycerin-and-water toner. MSM is an organic sulfur compound with an emerging but interesting track record for calming reactive skin, and Klairs pairs it here with licorice root extract, centella asiatica, and beta-glucan to build a soothing base that does real work on mildly inflamed skin. Hyaluronic acid and panthenol handle the hydration, a dash of sodium ascorbyl phosphate nudges toward brightening, and a cameo from copper tripeptide-1 at the bottom of the list adds a whisper of peptide signaling. The whole construction feels thoughtful in a way that a lot of hyped K-beauty toners don't. Look closer and there's even an amino acid cluster — lysine, acetyl methionine, theanine, proline — plus purslane, hollyhock, and luffa extracts and natto gum, the fermented-soybean film-former that contributes to the signature supple after-feel. All of it sits at pH 5.0, in step with the acid mantle and friendly to whatever active follows.
Texture-wise, it pours out as a slightly slippery liquid that's thicker than water but nothing like a gel. Patted into damp skin, it absorbs in about thirty seconds and leaves behind a cushiony finish that's distinctly not tacky — the beta-glucan does the heavy lifting there. If most budget hyaluronic serums leave your skin sticky, this is the opposite experience. Skin feels supple (the name is doing its job) without any of the gummy drag that cheap humectant toners leave behind.
Performance is where the product earns its cult status. For dehydrated skin — the kind that looks fine until you smile and see fine lines no moisturizer seems to touch — this toner genuinely helps. Two weeks of twice-daily use and most people notice their serums work better, not because the toner did anything dramatic, but because it prepped the skin the way a primer preps a canvas. Technique note: pour three or four drops into clean palms and press it onto still-damp skin — cotton pads drink half the bottle and add friction the formula doesn't need. And don't wait for it to 'finish drying'; the cushiony half-damp stage is exactly when the next layer should go on. The formula is pregnancy-safe. People with mild redness and post-acne reactivity also report a calming effect that's consistent with the MSM and centella story.
Now the honest part. This formula contains lavender, ylang ylang, geranium, lemon peel and orange peel essential oils at the tail end of the ingredient list. They're there for the soft herbal scent, and at these concentrations they're unlikely to cause problems for most skin. But 'most skin' isn't 'all skin,' and if you have rosacea, known fragrance sensitivity, or a reactive barrier that flares at the hint of linalool, this is going to be a problem. Klairs clearly knows this because they make an Unscented version of the same formula — and the existence of that alternative is basically an admission that the scented one isn't for everyone.
The scent itself, for those it works for, is pleasant and fades fast. It's not perfumey. If you've loved the lighter herbal facial waters of natural-shop brands, this will read as familiar. If you've sworn off essential oils after one too many patchy flareups, keep scrolling to the unscented review.
Value is genuinely good. At around $22 for 180ml, you're paying less per milliliter than most Western hydrating toners and getting a more interesting active list than the drugstore alternatives. A bottle lasts three to four months of twice-daily use on face and neck, which puts the monthly cost well under a Starbucks habit. There's no larger size — Klairs keeps things simple — but 180ml is enough volume to commit without feeling precious about it. The community record is deep: roughly 8,000 reviews averaging 4.5, a permanent spot in r/AsianBeauty starter routines, and a parent company — Wishtrend — that built the brand around minimalist sensitive-skin formulas back in 2010. The complaints are essentially one complaint: the essential oils, which is why the unscented twin exists.
The final recommendation is nuanced because the product is nuanced. For someone with normal, dry, or combination skin who wants a proper Korean-style hydrating toner and doesn't mind a light herbal scent, this is still one of the best entries in the category and an easy buy. For sensitive skin, rosacea, or anyone who's had bad experiences with fragrance — go straight to the Unscented version. And if you're brand new to K-beauty and trying to figure out what a toner step is even supposed to do, this is the bottle that originally answered that question for a generation of skincare enthusiasts. It still answers it well.
Formula
Key Ingredients
The hero actives that drive this product's performance.
| Ingredient | Function | Evidence |
|---|---|---|
| Dimethyl Sulfone (MSM) | Sits high in this toner's ingredient list as an organic sulfur compound that soothes reactive skin and supports the licorice and centella extracts in calming redness — an unusual hero for a hydrating toner and part of why this product became a sensitive-skin favorite. | Not yet assessed |
| Beta-Glucan | Works with the hyaluronic acid and panthenol to pull water into the skin and form a breathable film, which is why the toner leaves skin feeling cushiony rather than tacky despite the low-weight formula. | Not yet assessed |
| Centella Asiatica Extract | Paired with licorice root and MSM to calm visible irritation and support the barrier-soothing angle Klairs built this toner around — a logical combination for the sensitive, post-acne skin this product targets. | Not yet assessed |
| Sodium Ascorbyl Phosphate | A gentle, stable vitamin C derivative at a low position in the formula — not enough to replace a dedicated vitamin C serum but a nice layered brightening assist alongside the licorice extract. | Not yet assessed |
| Sodium Hyaluronate | Draws water into the skin so the follow-up essence or serum has something to grip — the whole point of a 'preparation' toner in a Korean layering routine. | Established mechanism for Dehydration · established mechanism |
| Copper Tripeptide-1 | A trace-level addition that adds peptide signaling to the formulation, though at this end of the INCI the amount is small — more of a marketing flourish than a functional dose. | Not yet assessed |
Ingredient standings describe the active at treatment-level doses and vehicles; this product's own condition grades weigh its actual formula.
Full INCI List · pH 5
Water, Butylene Glycol, Dimethyl Sulfone, Betaine, Caprylic/Capric Triglyceride, Disodium EDTA, Glycyrrhiza Glabra (Licorice) Root Extract, Centella Asiatica Extract, Chlorphenesin, Tocopheryl Acetate, Glycerin, Arginine, Carbomer, Panthenol, Luffa Cylindrica Fruit/Leaf/Stem Extract, 1,2-Hexanediol, Hydroxyethylcellulose, Aloe Barbadensis Leaf Extract, Althaea Rosea Flower Extract, Portulaca Oleracea Extract, Polyquaternium-51, Beta-Glucan, Lysine HCl, Sodium Ascorbyl Phosphate, Sodium Hyaluronate, Acetyl Methionine, Theanine, Proline, Natto Gum, Disodium Phosphate, Polysorbate 60, Sodium Phosphate, Citrus Limon (Lemon) Peel Oil, Lavandula Angustifolia (Lavender) Oil, Citrus Aurantium Dulcis (Orange) Peel Oil, Pelargonium Graveolens Flower Oil, Cananga Odorata Flower Oil, Eucalyptus Globulus Leaf Oil, Copper Tripeptide-1
✓ Pregnancy Safe ✗ Fragrance Free✓ Alcohol Free✗ Oil Free✓ Silicone Free✓ Paraben Free✓ Sulfate Free✓ Cruelty Free✓ Vegan✗ Fungal Acne Safe
lavender oillemon peel oilorange peel oilgeranium oilylang ylang oil
linaloollimonenecitral
Compatibility
Skin Match
Routine Step
toner
Time of Day
AM & PM
Layering Tips
Apply to damp skin after cleansing and before essence or serum. Pat in with hands rather than using a cotton pad to avoid wasting product.
Results Timeline
Immediately leaves skin feeling softer and more cushiony. Over 2-3 weeks of twice-daily use, skin feels better prepared to absorb follow-up products. Full calming benefits on reactive skin usually show by 4-6 weeks.
niacinamidehyaluronic-acidcentella-asiatica
Planning a combo? Check it against what you already use
Sample AM Routine
- Gentle cleanser
- Dear, Klairs Supple Preparation Facial Toner
- Vitamin C serum
- Moisturizer
- Sunscreen
Sample PM Routine
- Oil cleanser
- Water cleanser
- Dear, Klairs Supple Preparation Facial Toner
- Hydrating essence
- Moisturizer
Evidence
Science & Expert Perspective
The Science
The case for MSM (dimethyl sulfone) in topical skincare is still emerging, but it's more substantive than the typical K-beauty soothing ingredient trope. A 2015 review in Nutrients documented MSM's anti-inflammatory activity through inhibition of NF-κB signaling, which is the same pathway implicated in chronic skin inflammation. Topical studies are smaller but suggestive: a 2008 trial in the Journal of Cosmetic Dermatology on an MSM-containing silymarin cream showed measurable reductions in rosacea erythema over one month. That's not proof that this toner cures rosacea — the formulations and concentrations are different — but it does give the MSM angle a real mechanistic story.
Beta-glucan's track record is more mature. One trial published in the International Journal of Cosmetic Science documented oat beta-glucan's ability to penetrate the stratum corneum and increase hydration and elasticity, and dermatology studies have used it as a post-procedure soothing agent. Paired with centella asiatica — which has extensive literature around its triterpene compounds (madecassoside, asiaticoside) stimulating collagen synthesis and supporting barrier repair — and licorice root extract's glabridin-driven anti-inflammatory and tyrosinase-inhibiting activity, the soothing trio in this toner is built on ingredients with actual peer-reviewed backing.
The delivery matters too. By putting these actives in a water-based vehicle with a slightly acidic pH and a low-molecular-weight humectant matrix, Klairs has created a format that keeps the actives close to the skin surface where they're needed rather than locked into a heavier emulsion. It's a sensible way to structure a prep step.
Dermatologist Perspective
Dermatologists generally view hydrating toners as optional but potentially useful, especially for patients with dehydrated or post-procedure skin. Most dermatologists find that MSM and centella asiatica both have a reasonable evidence base for calming inflammation, making formulations like this one a sensible adjunct for patients dealing with mild reactivity or barrier compromise. The main caveat commonly raised is the essential oil content — dermatologists treating rosacea, perioral dermatitis, or fragrance-allergic patients typically recommend the unscented version of this specific product. For normal and combination skin types, this toner is often cited as a gentle introduction to multi-step Korean routines without requiring any harsh actives.
Guidance
Usage & Recommendations
How to Use
After cleansing, pour a small amount (three to four drops) into clean palms and press it evenly onto damp face and neck. Avoid cotton pads — they absorb product and give you less for the same pour. Layer while skin is still slightly wet to maximize hydration, then follow with essence, serum, moisturizer, and sunscreen during the day. Use twice daily, morning and night. If you have active breakouts or compromised barrier, pat lightly rather than rubbing. The toner is designed to leave a slightly cushiony finish — don't wait for it to fully 'dry' before moving to the next step.
Value Assessment
At around $22 for 180ml, this lands squarely in mid-tier K-beauty pricing and delivers more formulation thoughtfulness than you'd expect. Comparable hydrating toners from Western brands routinely cost $30-40 for less active-dense formulas. The three-to-four-month bottle life means your monthly cost is roughly $6, which is hard to argue with for a product that meaningfully improves how well the rest of your routine performs. The brand's ten-year track record on this specific SKU adds confidence — this isn't a new launch betting on hype. The only asterisk is that heavy users who soak cotton pads will churn through bottles faster, and there's no jumbo size to soften that cost.
Who Should Buy
People with normal, combination, or dehydrated skin who want a proper K-beauty hydrating toner and don't mind a light herbal scent. Ideal for anyone transitioning from Western routines who wants to learn what a prep step actually accomplishes, and a solid everyday pick for mild post-acne reactivity that needs calming rather than treating.
Who Should Skip
Give it a miss if you have rosacea, known fragrance sensitivity, or a reactive barrier that flares at essential oils — the Klairs Unscented version is made for exactly this reason and is the obvious alternative. It's also not for you if you're looking for exfoliating or clarifying toner benefits; this is purely a hydration and soothing product.
Ready to try Dear, Klairs Supple Preparation Facial Toner?
Buy at Amazon ♥ Details
Product Details
Texture
Lightweight, slightly slippery liquid — thicker than water but far from gel
Scent
Soft herbal-floral from the essential oil blend (lavender, ylang ylang, geranium)
Packaging
Frosted plastic bottle with a flat cap — pour spout, no pump
lightweightnon-greasyfast-absorbing
What to Expect on First Use
Goes on cool and slightly slippery, absorbing within about 30 seconds. Most users notice skin feels plumper and more receptive to follow-up products from the first use. No purging or tingling expected.
How Long It Lasts
About 3-4 months per unit with twice-a-day use to face and neck
Best Season
All Year
cruelty-freevegan
Background
The Story Behind This Product
Klairs launched in 2010 as Wishtrend's in-house minimalist line aimed at sensitive Korean skin. The Supple Preparation Toner became the brand's breakout product around 2015 when Western K-beauty YouTubers started featuring it as an introductory 'first essence' alternative — a reputation it still carries today.
About Dear, Klairs Established Brand (5–20 years)
Dear, Klairs launched in 2010 under Korean parent company Wishtrend and built a cult following around minimalist, sensitive-skin-friendly formulas. The brand has become a K-beauty staple on Reddit and YouTube skincare communities, though it lacks the independent clinical backing of larger dermatologist-developed lines.
Brand founded: 2010 · Product launched: 2015
Myth vs. Reality
Common Myths
Myth
Toners are just astringent steps that strip oil
Reality
This formula is the opposite — it contains no alcohol and is designed to add hydration and soothing actives rather than remove anything.
Myth
Essential oils in skincare are automatically bad
Reality
The oils here are present at very low concentrations for scent. They can still irritate genuinely reactive skin, which is why Klairs makes an unscented version — but for normal skin they pose minimal risk.
FAQ
Frequently Asked Questions
Is the Klairs Supple Preparation Toner good for sensitive skin?
It's marketed for sensitive skin, but the essential oil blend (lavender, ylang ylang, geranium) can be problematic for truly reactive skin. If you have rosacea or known fragrance sensitivity, choose the Unscented version of this same formula, which removes the oils and keeps the hydrating base.
What does 'Supple Preparation' actually mean?
It's a reference to Korean layering routines where toner is meant to 'prepare' skin to absorb the essence and serum that follow. This product leaves a damp, slightly slippery film of MSM, beta-glucan and hyaluronic acid that gives the next steps more to grip.
Can I use this with retinol or acids?
Yes — the pH sits around 5.0 which won't interfere with follow-up actives, and the soothing base of centella and licorice can actually help buffer retinol irritation when applied just before.
How does it compare to the Klairs Unscented version?
The formulas are nearly identical except the Unscented version omits the essential oil blend and adds a touch more glycerin. If the scent doesn't bother you and your skin tolerates fragrance, the scented version is fine — otherwise the Unscented is the safer pick.
Should I apply this with a cotton pad or my hands?
Press it in with your palms. This is a hydrating toner, not an exfoliating one — using a cotton pad wastes product and the light pressure of patting helps the MSM and beta-glucan absorb more evenly.
Is Supple Preparation Facial Toner safe to use during pregnancy?
The active ingredients are pregnancy-safe. Some people prefer to avoid essential oils during pregnancy out of caution, in which case the Unscented version is the better choice.
Reviews
What Reviewers Tend to Say
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.
leaves skin feeling plump
great as a first-step hydrator
works well for dehydrated skin
non-sticky finish
contains essential oils
scent bothers sensitive users
unscented version is preferred by many
r/AsianBeauty staplefeatured in numerous K-beauty routines on YouTube