Peptides: Signal, Carrier, Copper — Which Ones Actually Do Anything?
'Peptides' is one word standing in for a dozen unrelated molecules with wildly different evidence — most serums are hope in a bottle, but a few classes earn their place.
Promising for Aging
What Makes This Different
Combines three anti-aging delivery systems in one mask: NAD+ BIO capsules in the upper sheet, dissolvable PLA (polylactic acid) threads in the lower sheet, and a physical lifting band for mechanical compression. This triple approach — chemical actives, biodegradable polymer, physical device — is unlike any other sheet mask on the market.
Numbuzin
Numbuzin No. 9 NAD+ BIO Lifting-sil Full Face Mask Review
K-Beauty Lifting Innovation
mask sheet-mask k beauty Paraben Free Not Cruelty Free
The most technologically ambitious sheet mask in K-beauty — combining NAD+ capsules, 50 peptides, dissolvable PLA threads, and a physical lifting band into a single 40-minute treatment. The immediate lifting effect is real (if temporary), and the formulation matches the No. 9 Essence's ingredient complexity. At ~$5 per use, it's a luxury treatment at drugstore prices.
Made in South Korea Launched 2024 All-year use PAO: 24 months
Run it through our tools Clashes with my routine? Pregnancy-safe? Find a cheaper dupe Patch-test it first
Note: This sheet mask launched in 2024 with limited review volume. NAD+ and topical PLA thread technology are novel ingredients in sheet mask format with limited published clinical evidence. Our scoring is based on ingredient analysis, the brand's track record, and early user feedback. The rating should firm up as user feedback keeps coming in.
Verdicts All aging products →All dryness products →
How well it fits each concern
Verdict by concern tap a concern for the case
Promisingfor AgingIn your profileYou chose · Niacinamide has trial-level evidence for aging 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
- Nicotinamide Adenine Dinucleotide 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 none of the triggers this concern is sensitive to.
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
- Nicotinamide Adenine Dinucleotide
- Standing
- plausible — trials support it
- Form
- plausible — studied range 4–5%, from the trials on the row; needs leave-on contact; judge it after ~8 weeks
- Tolerability
- gentle
- Row checked
- against its sources on July 17, 2026 (evidence table ev-2026.09-r228)
The studies behind the evidence row
- Topical niacinamide reduces yellowing, wrinkling, red blotchiness, and hyperpigmented spots in aging facial skin — International Journal of Cosmetic Science (Bissett DL et al — The Procter & Gamble Company, Cincinnati) (2004), opened July 16, 2026
- Niacinamide: A B vitamin that improves aging facial skin appearance — Dermatologic Surgery (Bissett DL, Oblong JE, Berge CA — The Procter & Gamble Company, Miami Valley Laboratories) (2005), opened July 16, 2026
- The clinical anti-aging effects of topical kinetin and niacinamide in Asians: a randomized, double-blind, placebo-controlled, split-face comparative trial — Journal of Cosmetic Dermatology (National Taiwan University Hospital) (2007), opened July 16, 2026
- Evaluation of anti-wrinkle effects of a novel cosmetic containing niacinamide — Journal of Dermatology (Kinki University School of Medicine, Osaka) (2008), opened July 16, 2026
- A randomized, controlled comparative study of the wrinkle reduction benefits of a cosmetic niacinamide/peptide/retinyl propionate product regimen vs. a prescription 0·02% tretinoin product regimen — British Journal of Dermatology (P&G-funded; 5 P&G employees + 5 paid P&G consultants) (2010), opened July 16, 2026
- Skincare ingredients recommended by cosmetic dermatologists: A Delphi consensus study — Journal of the American Academy of Dermatology — expert Delphi consensus, NOT a graded guideline (2025), opened July 16, 2026
Supporting rolefor DrynessIn your profileYou chose · Nothing here targets dryness directly; humectant hydration is the recognised companion to treating it, and this sheet mask does that without known triggers.
The case for it
- Nicotinamide Adenine Dinucleotide has no evidence row yet for this concern — it is in the research queue.
- The formula carries none of the triggers this concern is sensitive to.
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 →
Show the work
- Rule
- R8 — The category's job (barrier care, humectant hydration, gentle cleansing, photoprotection) is the documented supportive role for this concern. This is the honest verdict for a moisturizer on an acne page. · the full register
- Carrying active
- Nicotinamide Adenine Dinucleotide
- Standing
- not assessed
- Form
- plausible
- Tolerability
- gentle
Also listed for Dullness — the actives here (Niacinamide, Lactic Acid, Hydrolyzed Collagen) 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.
As a maskNot judged: what a mask is for — works within its wear time, benefit outlasts the mask, comes off cleanly — cannot yet be measured from the ingredient list (only intensity without injury can).
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
- ✓ Triple delivery system (NAD+ capsules, PLA threads, lifting band) is unlike any other sheet mask
- ✓ Immediate visible lifting and firming effect on jawline and lower face after removal
- ✓ Premium ingredient roster matching the No. 9 Essence — NAD+, 50 peptides, mineral ferments
- ✓ Two-piece design covers entire face including the often-neglected jawline area
- ✓ Soft, breathable mask material that stays in place without slipping during 40-minute wear
- ✓ Fragrance-free and alcohol-free formulation gentle enough for most skin types
- ✓ Reusable lifting band reduces waste across multiple sessions
Cons
- ✗ At $5.50 per use, costs add up quickly with recommended 2-3 times weekly use
- ✗ 40-minute wear time is a significant commitment compared to standard 15-20 minute masks
- ✗ Lifting and firming effects are temporary without consistent regular use
- ✗ Topical PLA cannot replicate the depth or duration of injectable PLA treatments
- ✗ Physical lifting band may feel uncomfortable for those sensitive to facial compression
Review
Full Review
Sheet masks have a perception problem. For many Western skincare consumers, they're novelty items — fun for a self-care Sunday, photographed for Instagram, tossed after use. The Numbuzin No. 9 NAD+ BIO Lifting-sil Full Face Mask is trying very hard to change that narrative, and it brings genuinely interesting technology to the argument.
The concept is a three-part delivery system. The upper mask sheet carries NAD+ encapsulated in BIO capsules that release across the 30-to-40-minute wear, along with the same multi-peptide complex found in the No. 9 Essence. The lower sheet — covering jawline, chin, and lower cheeks — is embedded with dissolvable polylactic acid threads that melt during wear, depositing a collagen-adjacent polymer onto the skin. And wrapping it all together is a physical lifting band that straps under the chin and over the head, applying mechanical compression to the lower face.
The PLA thread technology is the most novel element, and also the one that most needs honest framing. Polylactic acid is well established in aesthetic medicine as an injectable that stimulates collagen production over months — but an injectable is deposited deep in the dermis, and a dissolving thread sits on the surface. A sheet mask cannot replicate what a needle achieves, and any marketing that implies otherwise is selling you a fantasy. What topical PLA does do is form a temporary firming film and offer a mild collagen-stimulating signal in the upper epidermis. It is borrowing from the clinic, not replacing it, and that distinction is the difference between a satisfied customer and a disappointed one.
The experience is distinctly different from a standard sheet mask. The two-piece design takes a moment of orientation — upper sheet across forehead, eyes and cheeks; lower sheet wrapped around jaw and chin. Once both are placed, the band straps on and creates a compression you are continuously aware of. It feels like a gentle, sustained hug for your face. Not uncomfortable, but definitely present, and for anyone who dislikes the sensation of facial pressure, definitely a dealbreaker.
The 30-to-40-minute recommendation is longer than most sheet masks, and it's functional rather than arbitrary. The PLA threads need time to dissolve fully, and the extended contact gives the NAD+ and peptides more opportunity to work. Occlusion is doing real work here too — the sealed, hydrated environment under a sheet mask meaningfully improves how water-soluble actives cross the stratum corneum compared with a serum that evaporates in ninety seconds. This is not a product for the impatient. It is a commitment mask.
Removal delivers the immediate payoff. Skin looks firmer, more defined along the jaw, and plumped with hydration; the remaining essence absorbs quickly when patted in rather than rinsed. There's a visible glow — part hydration, part PLA film, part the compression itself. The effect is temporary, lasting several hours to a day, but it is genuinely visible. As a pre-event treatment, this mask earns its place. What it does not do — and this is worth saying plainly, because the category invites the fantasy — is permanently reshape a jawline. Compression, hydration and elastic tension are cosmetic and reversible. Bone and fat pads are not renegotiating.
The formulation mirrors the No. 9 Essence in ambition. NAD+ and ATP for the cellular-energy story, a deep peptide bench (palmitoyl tripeptide-5, acetyl hexapeptide-8, copper tripeptide-1, palmitoyl pentapeptide-4), five saccharomyces mineral ferments — silicon, copper, magnesium, iron, zinc — plus resveratrol, thioctic acid, hydrolyzed collagen, trehalose, panthenol, niacinamide and adenosine. It's a roster that would be impressive in a leave-on product, let alone a single-use sheet. Whether all of it penetrates meaningfully in forty minutes is a fair question, and the honest answer is that some of it certainly doesn't; the extended wear and the occlusion simply give it a better chance than most masks do.
The mask material itself is well made — soft, breathable, and it stays put rather than sliding off your chin halfway through, which is the failure mode of every cheap sheet mask ever manufactured. The fit covers the entire face including the jawline, which is precisely where slackening shows first and where most masks stop short.
At $22 for four masks — roughly five and a half dollars a session — this sits at the premium end of K-beauty sheet masks and remains dramatically cheaper than anything making comparable technology claims. A professional lifting facial costs twenty to fifty times more per session. This mask will not replicate that, but it democratizes the ingredient philosophy, and the reusable band survives all four sessions comfortably. Individual foil packets keep each set fresh until use.
The frequency question is where the arithmetic bites. Numbuzin recommends two to three sessions a week alongside the daily essence, which burns through a box in roughly two weeks and turns this into a forty-plus-dollar monthly line item for the masks alone. That's a real commitment, and whether the cumulative peptide and NAD+ benefits justify it depends entirely on how your skin responds over four to eight weeks — a window in which the immediate lift is the least interesting thing happening.
Two caveats before you buy. The essence contains esters that put this outside fungal-acne-safe territory. And this is a 2024 launch with a review pool still in the low hundreds, so the early enthusiasm — genuine as it looks — should be read as a promising signal rather than a settled verdict, and NAD+ and topical PLA both remain thinly evidenced in this format.
At its best, this is a weekly or twice-weekly intensive inside a broader anti-aging routine. It produces a visible immediate result that ordinary sheet masks cannot, and the engineering behind the threads, capsules and band is real innovation rather than repackaging. It doesn't replace professional treatments. It brings the ingredients home — and sometimes that's enough.
Formula
Key Ingredients
The hero actives that drive this product's performance.
| Ingredient | Function | Evidence |
|---|---|---|
| Nicotinamide Adenine Dinucleotide (NAD+) | Delivered through encapsulated BIO capsules in the upper mask sheet, NAD+ aims to restore cellular energy production in aging skin during the extended 40-minute mask contact time, which provides significantly longer active ingredient exposure than a typical serum application. | Limited for Aging |
| 50-Type Peptide Complex (including Palmitoyl Tripeptide-5, Acetyl Hexapeptide-8, Copper Tripeptide-1) | The same comprehensive peptide library as the No. 9 Essence, but delivered through sheet mask soaking for extended skin contact. The 40-minute application time allows these signaling peptides more opportunity to interact with skin cells than a quickly-absorbing serum. | Not yet assessed |
| Polylactic Acid (PLA) Threads | Dissolvable PLA threads embedded in the lower mask sheet dissolve during wear, depositing polylactic acid directly onto the jawline and lower face. PLA is used in cosmetic filler injections for collagen stimulation — this topical application aims to provide a temporary firming and lifting effect. | Limited for Aging |
| Hydrolyzed Collagen | Provides immediate plumping hydration and film-forming benefits that complement the physical lifting effect of the band and PLA threads. The extended mask contact time allows better absorption of collagen peptides into the upper epidermal layers. | Not yet assessed |
| Niacinamide | Supports barrier function and provides brightening benefits during the mask session, contributing to the overall luminous, firmer appearance post-mask. | Limited for Aging |
Ingredient standings describe the active at treatment-level doses and vehicles; this product's own condition grades weigh its actual formula.
Full INCI List
Water, Dipropylene Glycol, Cetyl Ethylhexanoate, Glycerin, Niacinamide, Polyglyceryl-10 Stearate, 1,2-Hexanediol, Hydrogenated Poly(C6-14 Olefin), Isopentyldiol, Glyceryl Stearate SE, Butylene Glycol, Neopentyl Glycol Diheptanoate, Carbomer, Arginine, Panthenol, Trehalose, Ethylhexylglycerin, Xanthan Gum, Adenosine, Sodium Polyacrylate, Disodium EDTA, Propanediol, Polylactic Acid, Polyglyceryl-10 Laurate, Saccharomyces/Silicon Ferment, Saccharomyces/Copper Ferment, Saccharomyces/Magnesium Ferment, Saccharomyces/Iron Ferment, Saccharomyces/Zinc Ferment, Polyglyceryl-6 Laurate, Caprylic/Capric Triglyceride, Hydrogenated Lecithin, Thioctic Acid, Hydrolyzed Collagen, Adenosine Triphosphate, Nicotinamide Adenine Dinucleotide, Resveratrol, Palmitoyl Tripeptide-5, Acetyl Hexapeptide-8, Copper Tripeptide-1, Palmitoyl Pentapeptide-4
? Pregnancy Safety Unverified ✓ Fragrance Free✓ Alcohol Free✗ Oil Free✓ Silicone Free✓ Paraben Free✓ Sulfate Free✗ Cruelty Free✗ Vegan✗ Fungal Acne Safe
Cetyl Ethylhexanoate
Compatibility
Skin Match
Best For
Routine Step
treatment
Time of Day
PM
Layering Tips
Apply to clean, toned skin. Use the two-piece mask (upper and lower) together, then secure with the lifting band for 30-40 minutes. After removal, pat remaining essence into skin. Follow with a light moisturizer if needed. Best used 2-3 times per week.
Results Timeline
Immediate: visibly firmer, plumper, more defined jawline after removal. 1-2 weeks (2-3 uses): sustained improvement in skin firmness and hydration. 4-8 weeks (regular use): cumulative anti-aging benefits from peptide complex and NAD+, more resilient skin elasticity.
Hydrating toner (before mask)Light moisturizer (after mask)Numbuzin No. 9 Lifting-sil Essence (daily use between mask days)
Planning a combo? Check it against what you already use
Sample PM Routine
- Cleanser
- Toner
- THIS PRODUCT (30-40 minutes)
- Pat in remaining essence
- Light moisturizer
Evidence
Science & Expert Perspective
The Science
Polylactic acid (PLA), the dissolvable thread material in the lower mask, has extensive medical and aesthetic use. In injectable form (Sculptra), PLA microparticles stimulate neocollagenesis — new collagen production — over 2-4 months. Work appearing in the Journal of Cosmetic and Laser Therapy (2004) demonstrated significant collagen I and III synthesis following intradermal PLA injection. However, topical PLA application from dissolving threads operates at the surface level, where the collagen-stimulating signal is limited to the epidermis rather than the deeper dermal layers that injections reach.
The extended mask contact time (30-40 minutes) represents a meaningful advantage for active ingredient delivery. Research reported in Skin Pharmacology and Physiology has shown that sheet mask occlusion significantly enhances transepidermal penetration of active ingredients compared to non-occluded application. The hydrated, occluded environment created by the mask allows water-soluble actives like NAD+, peptides, and niacinamide to penetrate more effectively than they would from a quickly-absorbing serum.
Hydrolyzed collagen in this formula provides surface-level humectant and film-forming benefits. While topical collagen cannot penetrate to the dermis to replace lost structural collagen, a study in the Journal of Cosmetic Dermatology (2015) showed that hydrolyzed collagen peptides applied topically improved skin hydration and elasticity measurements, likely through moisture-binding and signaling effects on surface keratinocytes.
The mechanical compression from the lifting band may contribute to temporary lymphatic drainage, reducing facial puffiness. While no specific studies exist on this product's band, research on facial compression garments published in Aesthetic Surgery Journal has shown that external compression can reduce post-procedural edema and improve contour definition.
- Polylactic acid: a novel filler for facial lipoatrophy and collagen stimulation — Journal of Cosmetic and Laser Therapy (2004)
Dermatologist Perspective
Dermatologists view sheet masks as delivery vehicles rather than standalone treatments, and this mask's extended contact time and occlusive application improve ingredient penetration compared to wash-off products. Dermatology professionals frequently mention that topical PLA threads cannot replicate injectable PLA's dermal collagen stimulation, but acknowledge the ingredient's safety profile and surface-level benefits. The peptide and NAD+ complex is viewed with cautious optimism — the individual ingredients are interesting but unproven at these concentrations. Dermatologists may recommend this mask as a supplementary treatment for patients interested in non-invasive lifting approaches, with the caveat that professional treatments remain more effective.
Guidance
Usage & Recommendations
How to Use
Cleanse and tone skin. Apply the upper mask sheet first, aligning eye and mouth openings. Apply the lower mask sheet, wrapping around jawline and chin. Secure the lifting band under the chin and over the head, adjusting tension for comfortable compression. Wear for 30-40 minutes. Remove mask pieces and lifting band. Pat remaining essence into skin — do not rinse. Follow with a light moisturizer if needed. Use 2-3 times per week for best results.
Value Assessment
At $22 for four masks ($5.50 per use), this is premium for K-beauty sheet masks but remarkably affordable for the technology claims. Professional lifting treatments cost 20-50 times more per session. The ingredient complexity — NAD+, PLA threads, 50 peptides, mineral ferments — would be impressive in a $100 product. A 16-sheet bundle is also available for better per-unit value. The main cost concern is frequency: at 2-3 uses per week, monthly mask expenditure alone is $44-66.
Who Should Buy
Anyone looking for an intensive weekly anti-aging treatment that provides visible immediate results for special occasions or consistent improvement over time. Ideal for those concerned about jawline definition and lower face sagging, and for K-beauty enthusiasts who appreciate technology-forward sheet mask innovations.
Who Should Skip
If you find sheet masks impractical or don't have 40 minutes for the full treatment, this won't work for your lifestyle. Hold off, too, if you expect permanent lifting results — the effects are temporary without consistent use. Budget-conscious users should note the recurring cost at recommended frequency.
Ready to try Numbuzin No. 9 NAD+ BIO Lifting-sil Full Face Mask?
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Product Details
Texture
Two-piece sheet mask soaked in a rich, slightly viscous essence. The lower mask contains dissolvable PLA threads that create a subtle textured feel. The lifting band is a stretchy fabric strap.
Scent
Unscented — no detectable fragrance.
Packaging
Individual foil packets containing two mask sheets (upper and lower face) plus a reusable lifting band. The box contains 4 complete mask sets.
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What to Expect on First Use
The two-piece design takes a moment to figure out but adheres well once placed. The lifting band wraps around the jaw and over the head, creating a noticeable compression. During the 30-40 minute wear time, skin feels comfortably moist and held. After removal, skin appears immediately firmer, more defined around the jawline, and noticeably plumped.
How Long It Lasts
4 sessions (one box, used 1-2 times per week = 2-4 weeks)
Best Season
All Year
Background
The Story Behind This Product
This mask was designed as the intensive treatment companion to the No. 9 NAD+ Lifting-sil Essence, translating the same peptide and NAD+ technology into a format that delivers extended skin contact and adds physical lifting mechanics. The PLA thread technology borrows from aesthetic medicine, where polylactic acid fillers are used for collagen stimulation — here, it's applied topically through dissolvable threads in the mask material.
About Numbuzin Established Brand (5–20 years)
Numbuzin launched in 2019 under Korea's Benow Inc. This mask is the sheet mask companion to the No. 9 NAD+ Lifting-sil Essence, featuring the same 50-peptide and NAD+ anti-aging technology in a two-piece sheet mask format with a physical lifting band for jawline contouring.
Brand founded: 2019 · Product launched: 2024
Myth vs. Reality
Common Myths
Myth
Sheet masks with lifting bands can permanently reshape your jawline.
Reality
The lifting effect from masks and bands is temporary — it comes from compression, hydration plumping, and the elastic tension of the band. There's no permanent structural change to facial contours. Consistent use may provide cumulative skin-quality improvements (firmness, elasticity), but not bone or fat-pad restructuring.
Myth
PLA threads in a sheet mask work the same as PLA filler injections.
Reality
Injectable PLA (like Sculptra) is deposited deep in the dermis where it stimulates long-term collagen production. Topical PLA threads dissolving on the skin surface cannot penetrate to the same depth. The effect is more superficial — providing a temporary firming film and mild collagen-stimulating signal at the surface level.
FAQ
Frequently Asked Questions
How long should I wear this mask?
Apply both mask pieces and the lifting band for 30-40 minutes. The PLA threads in the lower sheet need time to dissolve, and the peptide-NAD+ complex benefits from extended skin contact. After removal, pat the remaining essence into your skin rather than rinsing.
How often should I use this mask?
For best results, use 2-3 times per week. The box contains 4 mask sets, lasting 1-2 weeks of regular use. The lifting band is reusable across all four sessions.
Is the lifting effect permanent?
No — the immediate lifting and firming effect is temporary, lasting several hours to a day. It comes from hydration plumping, the PLA thread film, and compression from the band. Consistent use over weeks may improve skin firmness and elasticity through the peptide and NAD+ complex.
Can I use this mask with the No. 9 Lifting-sil Essence?
Yes — they're designed as companions. Use the essence daily and the mask 2-3 times weekly for a comprehensive anti-aging routine. On mask days, use the mask in place of the essence, not on top of it.
What are PLA threads and are they safe?
Polylactic acid (PLA) is a biodegradable polymer used in medical sutures and cosmetic fillers. In this mask, PLA threads are embedded in the lower sheet and dissolve during wear, depositing a thin film on the skin. Topical PLA is safe and non-irritating — it's the same material used in dissolvable medical stitches.
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.
Immediate visible lifting and firming effect on jawline
Two-piece design covers the entire face including chin and jawline
Lifting band provides satisfying physical compression
Skin looks plumped, hydrated, and glowy after removal
Mask material is soft, breathable, and doesn't slip
$5-6 per use adds up quickly for regular use
40-minute wear time is a significant commitment
Lifting effects are temporary without consistent use
Physical lifting band can feel tight or uncomfortable