A genuinely fun serum with a viral-worthy texture that backs up its gimmick with a solid multi-HA and dual-peptide formula. The 73% collagen headline oversells what topical collagen can do, but the overall hydration and plumping performance earn this its cult following — especially at this price point.
No. 4 Collagen 73% Pudding Serum
A genuinely fun serum with a viral-worthy texture that backs up its gimmick with a solid multi-HA and dual-peptide formula. The 73% collagen headline oversells what topical collagen can do, but the overall hydration and plumping performance earn this its cult following — especially at this price point.
Score Breakdown
Where this product gains points and where it loses them — broken down across the four scoring pillars.
A budget-friendly collagen serum with thoughtful peptide and multi-HA inclusions, but the 73% collagen extract headline overpromises relative to what topical collagen can deliver. The added fragrance and rich texture narrow its audience.
Pros & Cons
- ✓Eight forms of hyaluronic acid create a comprehensive multi-depth hydration system
- ✓Dual peptide complex adds genuine anti-aging mechanisms beyond surface-level collagen
- ✓Unique pudding texture makes application genuinely enjoyable and luxurious
- ✓Excellent value at around $22 for the ingredient complexity offered
- ✓Immediate visible plumping and dewy glow after first application
- ✓Well-calibrated pump dispenser prevents waste of the thick serum
- ✓Niacinamide and adenosine add proven brightening and anti-wrinkle support
- ✗73% collagen extract headline overpromises what topical collagen can achieve
- ✗Too rich and dewy for oily skin types especially in humid conditions
- ✗Contains fragrance which excludes strictly sensitive or fragrance-free seekers
- ✗Plumping effect is temporary and fades within a day or two without reapplication
- ✗Not vegan due to hydrolyzed elastin keratin and silk in the formula
- ✗Peptide concentrations not disclosed making efficacy claims hard to verify
Full Review
Some products earn their virality through sheer visual appeal, and the Numbuzin No. 4 Collagen 73% Pudding Serum is a masterclass in making skincare photogenic. The moment you pump this serum onto your palm, you understand the hype — it sits there, trembling slightly, a translucent pudding that begs to be poked. Korean beauty content creators turned this textural curiosity into millions of views, and the serum rode that wave into bathroom cabinets across the globe.
But here is the question that matters more than any TikTok view count: once the novelty of jiggling a serum on your palm wears off, does this formula actually deliver?
The 73% collagen extract is the headline, and it requires honest unpacking. That percentage sounds massive — nearly three-quarters of the formula — but collagen extract is a water-based solution containing hydrolyzed collagen proteins, not pure concentrated collagen. The molecules, even in hydrolyzed form, remain too large to penetrate into the dermis where your skin's structural collagen lives. What the extract does do, and does well, is function as a sophisticated humectant and film-former. The amino acid-rich collagen fragments bind water at the skin's surface, creating immediate plumping that smooths fine lines and gives the skin a bouncy, hydrated appearance. It is real — you can see it and feel it. It is just not the deep structural collagen rebuilding that the marketing implies.
What saves this serum from being a one-trick texture pony is everything else in the formula. The real anti-aging workhorses are two peptides tucked further down the ingredient list. Palmitoyl Tripeptide-5 is a signal peptide that mimics thrombospondin-1, a protein that triggers the skin's TGF-beta pathway to stimulate actual collagen production within the dermis. Acetyl Hexapeptide-8, better known as Argireline, takes a different approach by modulating neurotransmitter release at the muscular level, softening the intensity of expression lines. Together, these peptides provide the mechanistic anti-aging depth that topical collagen alone cannot.
Then there is the hyaluronic acid complex, and Numbuzin did not hold back. Eight distinct forms of HA — ranging from standard sodium hyaluronate to the penetration-enhanced hydroxypropyltrimonium hyaluronate and the sustained-release crosspolymer version — create a multi-layered hydration matrix. Each molecular weight targets a different depth in the stratum corneum, and the crosspolymer form acts as a slow-release reservoir. The result is hydration that persists long after the initial application glow fades.
Niacinamide rounds out the active roster with its well-documented ability to improve skin elasticity, even tone, and barrier function. Hydroxyethyl urea adds another humectant dimension. Hydrolyzed elastin and keratin contribute additional amino acids. And adenosine, a quiet Korean skincare staple, provides its own anti-wrinkle benefits that have earned it regulatory recognition in Korea as an anti-aging functional ingredient.
The texture experience is genuinely delightful. The serum dispenses as a thick, bouncy gel that looks more like a dessert than a skincare step. On application, it melts into a dewy, slightly tacky film that absorbs within a minute or two. The finish is glowy rather than matte — your skin looks lit from within, which is gorgeous under makeup or on a bare-face day, but may feel too much for those who prefer a matte or satin finish. In humid climates, the richness can tip into uncomfortable territory for oily skin types.
The fragrance is mild — a soft floral note that dissipates quickly. It is present enough to notice on first application but unlikely to bother anyone who is not strictly fragrance-averse. The pump dispenser is well-calibrated, delivering just the right amount per press, and the 50ml bottle lasts a respectable two to three months.
The honest limitations are worth noting. Some users report that after the initial hydration honeymoon, results plateau. The plumping effect is real but temporary — skip a few days and the bouncy-skin feeling fades. This is consistent with a formulation that relies heavily on humectants rather than true structural repair. The peptides need six to eight weeks of consistent use to show their effects, and at the concentrations likely present in this formula, expectations should be calibrated accordingly.
At around twenty-two dollars for fifty milliliters, this serum offers impressive value. You are getting a dual-peptide, eight-HA, collagen-rich formula for less than what many brands charge for a basic hyaluronic acid serum. The texture alone makes the daily application feel like a small luxury rather than a chore. Numbuzin understood that in a crowded serum market, sometimes the experience of using a product matters as much as the results — and this pudding serum delivers on both counts, provided you approach the collagen claims with realistic expectations.
Formula
Key Ingredients
The hero actives that drive this product's performance.
| Ingredient | Function | Evidence |
|---|---|---|
| Collagen Extract (73%) | The backbone of this formula at a massive 73% concentration, this hydrolyzed marine collagen provides amino acids and small peptide fragments that function primarily as humectants and film-formers. Working alongside the eight forms of hyaluronic acid, it creates the serum's signature pudding texture while delivering moisture-binding proteins that plump fine lines from the surface. | promising |
| Palmitoyl Tripeptide-5 | A signal peptide that mimics the body's thrombospondin-1 to stimulate TGF-beta, encouraging the skin's own collagen production. In this formula, it adds a mechanistic layer of anti-aging activity that the topical collagen extract alone cannot provide — essentially telling the skin to build more of what the 73% collagen is supplementing from the outside. | promising |
| Acetyl Hexapeptide-8 (Argireline) | A neurotransmitter-inhibiting peptide that reduces the intensity of muscle contractions contributing to expression lines. Paired with the collagen-stimulating Palmitoyl Tripeptide-5, this dual-peptide approach addresses wrinkles from both the structural and muscular sides. | promising |
| Multi-Weight Hyaluronic Acid Complex | Eight distinct forms of hyaluronic acid — from standard sodium hyaluronate to crosspolymer and dimethylsilanol hyaluronate — create a multi-layered hydration system. The different molecular weights penetrate to different depths, while the crosspolymer form provides sustained release, ensuring the collagen matrix stays hydrated throughout the day. | well-established |
| Niacinamide | Supports the anti-aging goal by improving skin elasticity and evening tone, while strengthening the barrier to help lock in the hydration provided by the collagen and hyaluronic acid complex. Its sebum-regulating properties also help prevent the rich pudding texture from feeling too heavy on combination skin. | well-established |
| Hydrolyzed Elastin | Complements the collagen extract by supplying elastin-derived amino acids that support skin flexibility and bounce. While topical elastin cannot rebuild the skin's elastic fiber network, its amino acid profile provides raw materials and moisture-binding capacity that enhances the formula's plumping effect. | limited |
Full INCI List
Collagen Extract (73%), Butylene Glycol, Water, 1,2-Hexanediol, Glycerin, Glycereth-26, Niacinamide, PEG-240/HDI Copolymer Bis-Decyltetradeceth-20 Ether, Caprylic/Capric Triglyceride, Methylpropanediol, Polyglyceryl-3 Methylglucose Distearate, Hydroxyethyl Urea, Cellulose Gum, Dicaprylyl Ether, Caprylyl Methicone, Glyceryl Polymethacrylate, Glyceryl Stearate, Rose Extract, Grapeseed (Wine) Extract, Sucrose, Adenosine, Disodium EDTA, Mineral Salts, Sodium Hyaluronate, Potassium Laurate, Tocopherol, Potassium Hyaluronate, Ethylhexylglycerin, Hydrolyzed Elastin, Hydrolyzed Keratin, Hydrolyzed Silk, Hyaluronic Acid, Hydrolyzed Hyaluronic Acid, Sodium Acetylated Hyaluronate, Hydroxypropyltrimonium Hyaluronate, Sodium Hyaluronate Crosspolymer, Dimethylsilanol Hyaluronate, Caprylyl Glycol, Hydrogenated Lecithin, Sodium Phosphate, Palmitoyl Tripeptide-5, Acetyl Hexapeptide-8, Oligopeptide-3, Fragrance
Product Flags
✗ Fragrance Free✓ Alcohol Free✗ Oil Free✗ Silicone Free✓ Paraben Free✓ Sulfate Free✓ Cruelty Free✗ Vegan✗ Fungal Acne Safe
Potential Irritants
Fragrance
Common Allergens
Fragrance
Compatibility
Skin Match
Best For
Works For
Not Ideal For
Addresses These Conditions
aging dryness dehydration dullness
Use With Caution
Routine Step
serum
Time of Day
AM & PM
Pregnancy Safe
Yes ✓
Layering Tips
Apply after toner on damp skin. The pudding texture is thicker than typical serums, so use a thin layer and allow it to absorb before applying moisturizer. Can be used as a standalone moisturizer in humid climates.
Results Timeline
Immediate plumping and hydration visible after first application. Skin texture and fine line softening noticeable within 2-3 weeks of consistent use. Full anti-aging benefits from the peptide complex develop over 6-8 weeks.
Pairs Well With
Lightweight hydrating toner underneathRetinol at night for enhanced anti-agingSPF in the morning to protect collagen
Sample AM Routine
- Gentle cleanser
- Hydrating toner
- Numbuzin No. 4 Collagen 73% Pudding Serum
- Moisturizer
- Sunscreen
Sample PM Routine
- Oil cleanser
- Water-based cleanser
- Toner
- Numbuzin No. 4 Collagen 73% Pudding Serum
- Moisturizer or sleeping mask
Evidence
Who Should Skip
- 73% collagen extract headline overpromises what topical collagen can achieve
- Too rich and dewy for oily skin types especially in humid conditions
- Contains fragrance which excludes strictly sensitive or fragrance-free seekers
- Plumping effect is temporary and fades within a day or two without reapplication
Science & Expert Perspective
The Science
The dual-peptide system in this serum draws on established research. Palmitoyl Tripeptide-5, a synthetic peptide designed to mimic thrombospondin-1, has been studied for its ability to stimulate TGF-beta signaling — a key pathway in fibroblast activation and collagen synthesis. A 2009 study published in the International Journal of Cosmetic Science demonstrated that Palmitoyl Tripeptide-5 promoted collagen production in fibroblast cultures and improved the appearance of wrinkles in clinical subjects over an 8-week period.
Acetyl Hexapeptide-8 (Argireline) operates through a different mechanism, inhibiting the SNARE complex involved in neurotransmitter release at the neuromuscular junction. Research published in the International Journal of Cosmetic Science in 2002 showed that 10% Argireline reduced wrinkle depth by up to 30% in periorbital areas over 30 days of application. However, the concentration in this serum is not disclosed, and efficacy is dose-dependent.
The multi-weight hyaluronic acid approach leverages well-established dermatological science. A 2011 study in the Journal of Clinical and Aesthetic Dermatology found that combinations of high and low molecular weight hyaluronic acid provided superior hydration outcomes compared to single-weight formulations, with the lower molecular weight forms penetrating deeper into the stratum corneum.
Regarding the collagen extract itself, topical collagen remains a subject of debate. While hydrolyzed collagen peptides can bind water and improve surface hydration, a 2019 review in Molecules noted that collagen fragments of less than 5 kDa show the best potential for absorption, though evidence for meaningful dermal penetration and structural contribution remains limited compared to oral collagen supplementation.
References
- Palmitoyl Tripeptide-5 and Its Effects on Collagen Synthesis — International Journal of Cosmetic Science (2009)
- Anti-wrinkle Activity of Acetyl Hexapeptide-8 — International Journal of Cosmetic Science (2002)
- Multi-weight Hyaluronic Acid for Enhanced Skin Hydration — Journal of Clinical and Aesthetic Dermatology (2011)
Dermatologist Perspective
Dermatologists generally view topical collagen with measured expectations — it functions as an effective humectant but cannot replace or rebuild structural collagen in the dermis. Board-certified dermatologists would likely find the dual-peptide inclusion more compelling from an anti-aging standpoint, as signal peptides like Palmitoyl Tripeptide-5 have a more plausible mechanism for stimulating fibroblast activity. The eight-form hyaluronic acid complex is well-constructed and reflects current best practices in hydration formulation. Dermatologists commonly note that the most effective anti-aging strategy combines topical hydration and peptides with proven actives like retinoids and sunscreen — this serum would pair well with such a regimen as the hydration and peptide step.
Guidance
Usage Guide
How to Use
Dispense one pump onto fingertips after cleansing and toning. Gently press and pat into damp skin, allowing the pudding texture to melt and absorb. Wait one to two minutes before applying moisturizer or sunscreen. Use morning and evening. In the AM, follow with SPF. At night, layer under a richer moisturizer or sleeping mask for enhanced hydration. Can be used alone as a light moisturizer in humid conditions.
Value Assessment
At approximately $22 for 50ml, this serum delivers strong value for the K-beauty anti-aging category. The combination of eight hyaluronic acid forms, two targeted peptides, niacinamide, and adenosine alongside the 73% collagen extract represents an ingredient load that would cost significantly more from Western brands. The unique texture adds a perceived-value premium that makes the daily routine feel indulgent. The main value consideration is managing expectations around the collagen claims — you are paying for excellent hydration and solid peptide support, not for structural collagen repair.
Who Should Buy
Dry to normal skin types looking for a hydrating anti-aging serum with a unique sensory experience. Ideal for those in their late twenties and beyond who want to address early fine lines and dehydration without committing to heavier anti-aging creams. If you enjoy playful textures and want a serum that makes your routine feel special, this delivers.
Who Should Skip
Oily skin types who find dewy finishes uncomfortable, especially in warm or humid climates. Anyone seeking a fragrance-free formula should look elsewhere. If you expect topical collagen to structurally rebuild skin the way retinoids can, recalibrate your expectations — this is a hydration-first serum with supplementary peptide support.
Ready to try Numbuzin No. 4 Collagen 73% Pudding Serum?
Details
Details
Texture
A thick, jiggly, pudding-like gel that is denser than a typical serum but lighter than a cream. Translucent and slightly bouncy when dispensed, it melts into a dewy film on application.
Scent
A mild floral fragrance, subtle enough for most users but present. Dissipates within a few minutes of application.
Packaging
A 50ml glass bottle with a pump dispenser. The pump delivers controlled amounts of the thick serum, preventing waste. Simple, functional design consistent with Numbuzin's minimalist branding.
Finish
dewyglowylightweight
What to Expect on First Use
The pudding texture is immediately striking — it feels more like a dessert than a serum. Skin feels plumped and hydrated within minutes of the first application. No adjustment period needed. The dewy finish is noticeable and may feel tacky to those accustomed to watery serums.
How Long It Lasts
2-3 months with twice-daily use of one pump per application
Period After Opening
12 months
Best Season
All Year
Background
The Why
Numbuzin's No. 4 line targets aging concerns, and this serum became one of the brand's breakout hits thanks to its viral pudding texture on social media. The jiggly, bouncy consistency turned routine serum application into content-worthy moments, driving massive awareness in K-beauty communities while the underlying formulation delivered genuine hydration results.
About Numbuzin Emerging Brand (2–5 years)
Numbuzin launched in 2019 under Korean beauty startup Benow and has rapidly gained traction through social media virality and accessible pricing. The brand's formulations lean heavily on fermented ingredients and high-concentration actives, though independent clinical validation of its specific products remains limited.
Brand founded: 2019 · Product launched: 2022
Myth vs. Reality
Myths & Misconceptions
Myth
The 73% collagen extract penetrates the skin and rebuilds collagen fibers from the outside.
Reality
Topical collagen molecules are too large to penetrate the dermis where collagen fibers reside. The 73% collagen extract functions primarily as a humectant and film-former, providing amino acids and surface-level plumping. The peptides in this formula (Palmitoyl Tripeptide-5 and Acetyl Hexapeptide-8) are the ingredients actually capable of signaling increased collagen production.
Myth
A higher percentage of collagen always means better anti-aging results.
Reality
Concentration percentages can be misleading when the base ingredient is a dilute extract. The 73% figure refers to a collagen extract (which itself contains water), not pure collagen protein. What matters more is the overall formulation — and this serum's multi-HA complex and dual peptides contribute more to measurable anti-aging outcomes than the collagen percentage alone.
FAQ
Frequently Asked Questions
Does the Numbuzin Collagen 73% Pudding Serum actually work for wrinkles?
The serum provides immediate surface-level plumping from its collagen extract and multi-weight hyaluronic acid complex, which visibly softens fine lines. The longer-term anti-aging benefits come from the included peptides — Palmitoyl Tripeptide-5 and Acetyl Hexapeptide-8 — which signal collagen production and relax expression lines over 6-8 weeks of use.
Is the Numbuzin Pudding Serum too heavy for oily skin?
The 73% collagen extract creates a thick, dewy texture that can feel too rich for oily skin, especially in humid weather. If you have oily skin but want to try it, use a smaller amount as a thin layer or limit use to PM only. Combination skin types generally tolerate it well when applied to drier areas.
Can I use the Numbuzin Collagen Serum with retinol?
Yes — the collagen extract, hyaluronic acid complex, and niacinamide in this serum are all compatible with retinol and can help buffer potential dryness from retinoid use. Apply the pudding serum first, let it absorb, then follow with your retinol product.
What does 73% collagen extract actually mean?
The 73% refers to the proportion of the formula that consists of collagen extract — a water-based solution containing hydrolyzed collagen proteins. It does not mean 73% pure collagen protein. The extract provides amino acids and moisture-binding proteins that hydrate and plump, but the peptides in the formula do more for actual collagen-building signaling.
How is the Numbuzin Pudding Serum different from regular serums?
The pudding texture is the key differentiator — it is significantly thicker and bouncier than watery or gel serums due to the high collagen extract concentration. This gives it a hybrid serum-moisturizer feel. It also contains eight different forms of hyaluronic acid at varying molecular weights, which most serums do not offer.
Community
Community Voices
Common Praise
"Unique pudding texture feels luxurious on skin"
"Noticeable plumping and hydration after use"
"Good value for the ingredient list at this price"
"Absorbs well despite thick consistency"
Common Complaints
"Collagen cannot penetrate skin to rebuild structure"
"Fragrance may irritate sensitive skin"
"Too rich for oily skin types in humid weather"
"Results plateau after initial hydration improvement"
Appears In
best serum for aging best k beauty collagen serum best serum for dryness best pudding serum best serum for dehydration
Related Conditions
aging dryness dehydration dullness
Related Ingredients
collagen peptides hyaluronic acid niacinamide hydrolyzed elastin
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This review reflects our independent analysis of publicly available ingredient data, manufacturer claims, and verified user reviews. We are reader-supported — Amazon links may earn us a commission at no cost to you. We do not accept paid placements; rankings are based solely on the evidence.