U.S. Market · Product Teardown
A ten-ingredient Korean hydrating serum that stakes its whole proposition on beta-glucan and on having almost nothing else in the bottle, sold at a street price that has barely moved from its own long-run average.
- Product information
- Product rating and voice of customer
- Product ingredients
- Product price and history
- Product gallery
- Data notes
Product Information
| Product name | IUNIK Beta-Glucan Power Moisture Serum - Deep Hydration 1.69 fl oz |
|---|---|
| Brand | IUNIK |
| ASIN | B07NNVZNQR |
| Category path | Beauty & Personal Care > Skin Care > Face > Treatments & Masks > Serums |
| Size / format | 1.69 fl oz (50 ml) |
| Marketplace | Amazon US, delivery ZIP 10001, native USD |
| Snapshot date | 2026-10-31 |
IUNIK Beta-Glucan Power Moisture Serum is a hydrating serum from a Korean brand that builds its lines around one named active per product. Here the active is beta-glucan, a polysaccharide the brand sources from mushrooms, and the formula around it is deliberately thin: water, glycerin, 1,2-hexanediol and butylene glycol do the solvency and humectant work, adenosine carries the firming claim, sodium PCA adds a second humectant, and carbomer plus sodium polyacrylate give the gel its body. The listing sells that thinness as the point, describing a formula of ten essential ingredients positioned for sensitive and reactive skin rather than for a long list of actives.
The claim that carries the product is comparative. The brand states that beta-glucan holds up to 20 percent more moisture than hyaluronic acid, and its own footnote limits that to the inherent properties of the raw material rather than to a finished-formula test. The offering is a 50 ml / 1.69 fl oz dropper bottle used as a single step: apply an appropriate amount to the face and let it absorb. At 0.016 percent, declared on the pack as 160,000 ppb, beta-glucan sits ninth of ten on the panel, which is worth holding alongside the size of the claims made for it.
What the listing claims
- [ INSTANT MOISTURE BOOST ] Powered by mushroom-derived Beta-Glucan, delivering deep hydration while supporting the skin barrier. Known to hold up to 20% more moisture than hyaluronic acid and help improve skin elasticity.
- [ LONG-LASTING HYDRATION ] Provides continuous moisture throughout the day without heaviness, helping keep skin balanced, soft, and refreshed.
- [ PLUMPING & FIRMING CARE ] Helps improve the look of elasticity and loss of bounce, leaving skin feeling plump, smooth, and more supple.
- [ MINIMAL INGREDIENT FORMULA ] Formulated with just 10 essential ingredients to deliver effective hydration with minimal risk of irritation, making it suitable for sensitive and reactive skin.
- [ LIGHTWEIGHT GEL TEXTURE ] The silky gel formula absorbs quickly without stickiness, leaving skin feeling fresh, dewy, and comfortably hydrated.
Specification table
| Attribute | Value |
|---|---|
| Skin Type | All, Combination, Dry, Normal, Sensitive |
| Product Benefits | Firming, Glow, Hydrating, Moisturizing, Soothing |
| Use for | Face |
| Scent | Unscented |
| Special Ingredients | Beta-Glucan, Glycerin |
| Item Volume | 1.69 fluid ounces (50 ml) |
| Item Weight | 0.02 kg |
| Product Dimensions | 1.67 x 2.1 x 6 inches; 0.78 ounces |
| Item model number | CJAPQ_02 |
| UPC | 759430449315 |
| Manufacturer | YEGREENA CO., LTD |
| Sold by | CrediThink (third party), shipped by Amazon |
| Availability | In Stock |
| Best Sellers Rank | #1,712 in Beauty & Personal Care; #50 in Facial Serums |
Product Rating and Voice of Customer
The rating profile is read in two layers: the arithmetic of the star distribution, and the language customers actually use. Both are shown, and neither is extrapolated beyond what was published.
Star distribution
Rating at a glance
| Average rating | 4.4 / 5 |
|---|---|
| Total ratings | 2,736 |
| 5-star share | 74% |
| 4-star share | 13% |
| 3-star share | 5% |
| 2-star share | 3% |
| 1-star share | 5% |
| Community rating (open database) | 3.7 / 5 · 267 reviews |
What customers say, in aggregate
Customers find the serum effective and moisturizing, particularly for dry, sensitive skin, and appreciate that it absorbs quickly into the skin without feeling sticky. They consider it worth the price and report their skin feels soft and smooth after use. The product receives mixed feedback about its gentleness and non-greasy feel, with some finding it comfortable without irritation while others report it's not great for very sensitive skin and leaves a sticky layer on top.
| Aspect | Mentions | Positive share |
|---|---|---|
| Effectiveness | 249 | 80% |
| Moisturizing | 218 | 84% |
| Skin reaction | 108 | 68% |
| Value for money | 69 | 72% |
| Gentle | 69 | 65% |
| Skin feel | 61 | 93% |
| Non-greasy | 58 | 64% |
| Absorption | 50 | 88% |
Individual review text was not rendered on the captured listing page, so no verbatim review is quoted here. The aggregate summary and aspect table above are the published substitutes.
Product Ingredients
10 ingredients were merged into one roster. Each ingredient is graded on comedogenic risk, irritation risk and an overall safety grade, all read low is safer (0 or 1 is the benign end; 3 and above is the caution band). Level assignment takes the highest of the three grades, so a single severe flag is never averaged away.
What's inside
A "not" prefix is a failed claim, not a marketing variant: it means the formula does not meet that standard.
Level classification
Count of ingredients by level
Functional family mix
| Level | Reading | Ingredients | Share | Members |
|---|---|---|---|---|
| 0 | No known comedogenic or irritant activity | 2 | 20.0% | Glycerin, Sodium PCA |
| 1 | Low risk, generally tolerated | 2 | 20.0% | Butylene Glycol, Carbomer |
| n/r | Not rated by either database | 6 | 60.0% | Water, 1,2-Hexanediol, Adenosine, Tromethamine, Beta-Glucan 0.016%, Sodium Polyacrylate |
"Not rated" is missing data, not a clean bill of health. Most commodity ingredients carry no grade in either database.
Benefit claims and how many ingredients carry them
| Benefit | Ingredients | Mechanism as stated |
|---|---|---|
| Hydrating | 7 ingredients | Boosts hydration and relieves dry, tight skin. Attributed to Glycerin, 1,2-Hexanediol, Butylene Glycol, Adenosine, Sodium PCA, Beta-Glucan and Sodium Polyacrylate. |
| Barrier Repair | 4 ingredients | Strengthen and restore the skin's natural barrier. Attributed to Glycerin, Butylene Glycol, Sodium PCA and Beta-Glucan. |
| Reduces Irritation | 3 ingredients | Eases discomfort and supports skin resilience. Attributed to Adenosine, Sodium PCA and Beta-Glucan. |
| Scar Healing | 2 ingredients | Improves the look of marks and scars. Attributed to Glycerin and Beta-Glucan. |
| Anti-Aging | 1 ingredient | Softens lines and helps skin look youthful. Rests on Adenosine alone. |
| Redness Reducing | 1 ingredient | Soothes visible redness and calms irritation. Rests on Beta-Glucan alone. |
Class-level concerns
| Concern | What the database means |
|---|---|
| Butylene Glycol and sensitive skin | The ingredient reference for this formula notes that although butylene glycol works with most skin types, some people with sensitive skin may experience a reaction such as allergic rashes, closed comedones or itchiness. It is the only adverse ingredient-level statement the record publishes, and it matters here because the serum is marketed to reactive skin. |
These are ingredient-class warnings: the formula contains ingredients capable of the stated effect. They are not a prediction about any one user.
Key ingredient groups
- Skin Conditioning — 7 ingredient(s). Water, Glycerin, 1,2-Hexanediol, Butylene Glycol, Adenosine, Sodium PCA and Beta-Glucan, the largest functional family in the formula.
- Humectant — 3 ingredient(s). Glycerin, Butylene Glycol and Sodium PCA, the ingredients that actually pull and hold water in the upper layers.
- Solvent — 2 ingredient(s). Water and 1,2-Hexanediol, the carrier phase of the gel.
- Emulsion Stabilising — 2 ingredient(s). Carbomer and Sodium Polyacrylate, which build and hold the gel texture.
- Masking — 2 ingredient(s). Butylene Glycol and Tromethamine, used to keep the unscented base neutral.
- Gel Forming — 1 ingredient(s). Carbomer, the single structuring polymer behind the lightweight gel the listing describes.
Complete ingredient roster
| # | INCI name | Function | Comedo | Irrit | Safety | Level |
|---|---|---|---|---|---|---|
| 1 | Water | Skin Conditioning, Solvent | EM | EM | EM | — |
| 2 | Glycerin | Humectant, Skin Conditioning, Skin Protecting | 0 | 0 | EM | 0 |
| 3 | 1,2-Hexanediol | Skin Conditioning, Solvent | EM | EM | EM | — |
| 4 | Butylene Glycol | Humectant, Masking, Skin Conditioning | 1 | 0 | EM | 1 |
| 5 | Adenosine | Skin Conditioning | EM | EM | EM | — |
| 6 | Tromethamine | Buffering, Masking | EM | EM | EM | — |
| 7 | Sodium PCA | Humectant, Skin Conditioning | 0 | 0 | EM | 0 |
| 8 | Carbomer | Emulsion Stabilising, Gel Forming | 1 | 0 | EM | 1 |
| 9 | Beta-Glucan 0.016% | Skin Conditioning | EM | EM | EM | — |
| 10 | Sodium Polyacrylate | Absorbent, Emollient, Emulsion Stabilising | EM | EM | EM | — |
Product Price and History
Every figure below is native USD as listed for a U.S. delivery address. No conversion, no estimate. The history block is all-time, not period-specific.
Amazon price history
| Price type | Lowest ever | Highest ever | Current | Average |
|---|---|---|---|---|
| Amazon | No data recorded for this channel | |||
| 3rd Party New | $12.33 Jun 23, 2026 | $23.99 Aug 24, 2025 | $19.17 Oct 26, 2026 | $19.03 |
| 3rd Party Used | No data recorded for this channel | |||
"Current" is the last observed value with its own date, not a live quote. Monitoring since Mar 06, 2019.
Price record, compared
Position and spread
Read against the 3rd Party New series, the channel with published history for this product.
| Metric | Value | Reading |
|---|---|---|
| Current vs all-time low | 55.5% | $6.84 above the floor |
| Current vs average | 0.7% | above the typical shelf price |
| Current vs all-time high | -20.1% | $4.82 below the peak |
| All-time spread | 94.6% | peak minus floor, an indicator of promotional depth |
| Average vs list price | -2.8% | how far the street price sits from the anchor |
Product Gallery
Listing imagery and customer-submitted photographs, shown in source order.
Front of the clear glass dropper bottle with its pale blue label band, 50 ml, against a white sweep.
Model holding the dropper bottle, with the brand's three hashtag claims set beside her.
Hydration claim panel: the 20 percent moisture comparison against hyaluronic acid, with its raw-material footnote.
Brand infographic ranking glycerin, hyaluronic acid and beta-glucan as three generations of humectant.
Minimal-formula panel with a before and after skin comparison under the ten-ingredient headline.
Bottle shot among laboratory glassware with the vegan, animal test-free and dermatest seals stacked at right.
Ingredient panel image listing all ten ingredients, with beta-glucan declared at 160,000 ppb.
Outer carton front and back, showing the full INCI list, the how-to-use text and the manufacturer details.
Data Notes
- Review text was not captured: the US review block did not render for this ASIN on any of the three page variants retrieved, so no verbatim review is quoted. The 2,736-ratings aggregate, the star distribution and the published AI review summary are reported instead, and no review language has been reconstructed.
- No buyer-uploaded photos were exposed by the listing: zero review-media tiles were rendered and no rendered review carried an image, so the gallery contains listing photography only. Listing imagery is never presented as customer content.
- COSDNA was attempted once and returned the Cloudflare interstitial (visible text: "Just a moment..."), so no COSDNA safety grades exist for this product in this run. The ingredient analysis is single-sourced and labelled as such.
- Ingredient grades are published for four of the ten ingredients only. The other six are shown as unrated; blanks are missing data, not a zero risk score.
- Two community scores exist and are deliberately not combined: 4.4 from 2,736 marketplace ratings, and 3.7 from 267 votes on the open database. Different populations, different denominators.
- The price record has no Amazon-direct series. Every historical figure describes third-party new offers, which matches the listing's buy box showing a marketplace seller with Amazon fulfilment.
- Derived price position, computed from the third-party series because there is no Amazon-direct series to compute it from: current $19.17 is 55.5 percent above the $12.33 all-time low, 0.7 percent above the $19.03 average, 20.1 percent below the $23.99 high, and sits 58.7 percent of the way from floor to peak. Lifetime spread is $11.66, itself 94.6 percent of the low.
- What that position implies: this is a serum that trades close to its own long-run mean and discounts rarely and modestly, so waiting for a step change in the one-time price is a weak strategy, while the Subscribe and Save tier at $16.63 is a larger and more reliable lever than any historical markdown observed.
- Two different reference prices are in circulation: the live listing strikes through $19.57 while the price tracker records a list price of $24.99. Both are reported, neither is treated as authoritative.
- The community ingredient record was last updated October 31, 2025, a year before this capture; the formula in this report was confirmed against the packaging shown on the listing, which matches the record exactly.
- Beta-glucan is declared at 0.016 percent (160,000 ppb) and sits ninth of ten ingredients, which is worth holding against the size of the moisture and anti-aging claims made for it.
- Ratings, prices and ranks move between captures; figures here describe the snapshot date only.
- Ingredient grades are community-database aggregates used as reference, not a regulatory or dermatological verdict. Formulas are reformulated without notice; the packaging wins.
- No reviewer name, handle, profile link or identifier appears anywhere in this report.