No.3 Skin Softening Serum
No.3 Skin Softening Serum
Product Description
Product overview
A fermented powerhouse serum with 42% Bifida Ferment Lysate and 21% Galactomyces Ferment Filtrate that smooths rough texture, refines enlarged pores, and delivers a radiant glass-skin glow. Clinically proven to reduce pore area by 30.9% in just 2 weeks.
63% Fermented Actives
Combines 42% Bifida Ferment Lysate and 21% Galactomyces Ferment Filtrate for maximum skin-softening and brightening power.
Texture & feel
SENSORY63% Fermented Actives
Combines 42% Bifida Ferment Lysate and 21% Galactomyces Ferment Filtrate for maximum skin-softening and brightening power.
Clinically Proven Results
Clinically tested to reduce pore area by 30.9% and skin roughness by 11.39% within just 2 weeks of use.
SK-II-Level Ingredient at K-Beauty Price
Contains the same star ingredient as SK-II Facial Treatment Essence (Galactomyces) at a fraction of the cost.
Barrier-Strengthening Complex
Niacinamide, Panthenol, Squalane, and Hyaluronic Acid work together to reinforce the skin barrier and lock in hydration.
Safety & compatibility
SAFENo retinoids, salicylic acid, hydroquinone, or chemical sunscreens. Safe for use during pregnancy and breastfeeding.
Contains fermented ingredients (Bifida, Galactomyces) and PEG-90 that may feed Malassezia yeast. Patch test first if prone to fungal acne.
No heavy oils or known pore-clogging ingredients. Formulated without silicones or mineral oil. Safe for acne-prone skin in most cases.
Passed hypoallergenic and skin irritation tests. Free from fragrances, essential oils, parabens, and drying alcohols.
Works well with most actives. Space usage if combining with retinol or strong AHA/BHA exfoliants. Safe to layer with Vitamin C.
Not suitable for those seeking a fully vegan formula. Contains goat milk and silk extracts derived from animal sources.
Ingredient breakdown
INGREDIENTSBifida Ferment Lysate 42%Promising
A probiotic ingredient derived from the fermentation of Bifida bacteria. It strengthens the skin microbiome, repairs the skin barrier, and supports DNA repair activity. The same star ingredient found in Estee Lauder Advanced Night Repair.
- Barrier Support: A study showed 10% bacterial extract improved barrier function and decreased skin sensitivity in reactive skin.
- Microbiome Balance: Helps restore healthy skin flora, making skin less reactive to environmental aggressors.
- UV Defense: Manufacturer data suggests it protects against UV-induced damage and assists with cellular repair.
Galactomyces Ferment Filtrate 21%Promising
A yeast-derived ferment filtrate, famously known as "Pitera" in the SK-II line. Discovered when scientists noticed sake brewers had remarkably smooth, youthful hands. Rich in vitamins, amino acids, and organic acids.
- Brightening: Improves skin's natural moisturizing factors (NMF) and helps even out skin tone over time.
- Oil Control: Studies show it can help regulate sebum production and reduce keratin buildup in pores.
- Antioxidant: Protects against oxidative stress and UV-induced inflammation.
Niacinamide (Vitamin B3) 4–6%Proven
A well-studied, multi-tasking active ingredient. At this concentration, it can regulate oil production, reduce acne, minimize pore appearance, and brighten uneven skin tone.
- Oil Regulation: At 4-6%, proven to help balance sebum production and reduce clogged pores.
- Brightening: Reduces pigmentation marks and fights photodamage for a more even complexion.
- Barrier Support: Increases ceramide synthesis for stronger, healthier skin barrier and improved hydration.
Adenosine 0.5–1%Proven
A naturally occurring compound in skin cells. Clinically confirmed to reduce the appearance of dynamic wrinkles — the fine lines that form around the eyes and forehead with age and facial movement.
- Anti-Wrinkle: Clinical trials confirm visible reduction in dynamic wrinkles even at low concentrations.
- Collagen Support: Helps stimulate collagen production for firmer, more resilient skin over time.
Panthenol (Pro-Vitamin B5) 0.5–1%Proven
A well-known soothing and hydrating ingredient that strengthens the skin barrier. Helps improve moisture retention and calms irritation, making it especially beneficial for sensitive or compromised skin.
- Hydration: Attracts and retains moisture in the upper layers of the skin.
- Barrier Repair: Accelerates skin barrier recovery, particularly after damage from actives or environmental stressors.
Sodium Hyaluronate <1%Proven
The salt form of Hyaluronic Acid, with a smaller molecular size that penetrates deeper into the skin. A powerful humectant that can hold up to 1,000x its weight in water.
- Deep Hydration: Lower molecular weight allows better penetration than standard hyaluronic acid.
- Plumping Effect: Draws moisture into skin for a visibly plumper, smoother appearance.
Squalane <1%Proven
A lightweight, non-greasy emollient that mimics the skin's natural oils. Compatible with virtually all skin types including acne-prone skin, providing moisture without clogging pores.
- Compatibility: Suitable for acne-prone and oily skin types due to its non-comedogenic nature.
- Moisture Lock: Creates a protective barrier to prevent trans-epidermal water loss (TEWL).
28 ingredients
Bifida Ferment Lysate (42%), Galactomyces Ferment Filtrate (21%), Butylene Glycol, Methyl Gluceth-20, Purified Water, Niacinamide, PEG-90, 1,2-Hexanediol, Glycerin, Squalane, Alteromonas Ferment Extract, Silk Extract, Goat Milk Extract, Sodium Hyaluronate, Panthenol, Adenosine, Glycereth-26, Xanthan Gum, Polyglyceryl-3 Distearate, Glyceryl Stearate SE, Glyceryl Stearate Citrate, Polyglyceryl-3 Methylglucose Distearate, Carbomer, Tromethamine, Ethylhexylglycerin, Caprylyl Glycol, Tropolone, Disodium EDTA
Where it fits in your routine
ROUTINEUse morning and night after toner/essence. Pair with the Numbuzin No.3 Toner for 214% enhanced effectiveness (per brand clinical data). Follow with moisturizer to seal in benefits.
How to use
HOW TO USECleanse & Prep
Start with a clean face. Apply your toner or essence and let it absorb before moving to the serum step.
Dispense 3–4 Drops
Using the glass dropper, dispense 3-4 drops into your palms. Avoid touching the dropper tip directly to your skin to keep the product hygienic.
Apply & Pat Gently
Spread evenly across your entire face and pat gently with your fingertips to help absorption. The serum absorbs within 30 seconds without stickiness.
Layer & Seal
Follow with your eye cream or moisturizer. In the morning, always finish with SPF. For an intensive treatment, soak a cotton pad and apply as a 3-minute mask pack.
Who is it for?
WHOPerfect for you if:
- You have rough, bumpy, or textured skin you want to smooth out
- You struggle with enlarged pores and want a refined complexion
- You want an affordable alternative to SK-II with similar fermented actives
- Your skin looks dull and you want a healthy, glass-skin glow
- You need a hydrating serum that layers well under makeup
- You have dehydrated skin showing early signs of aging
Consider alternatives if:
- You are prone to fungal acne (Malassezia) — ferments may trigger flare-ups
- You have known sensitivity or allergies to fermented ingredients
- You require a fully vegan product (contains goat milk and silk extracts)
- You prefer an ultra-lightweight, water-thin consistency (this is slightly viscous)
- You need a serum specifically targeting active acne with exfoliating acids
Skin type compatibility
SKIN TYPESNiacinamide helps regulate sebum production. Slightly viscous texture may feel tacky in hot, humid weather. Absorbs well without heavy residue.
Exceptional hydration from Bifida, Hyaluronic Acid, Squalane, and Panthenol. Leaves skin plump and dewy. Layer with a rich moisturizer for best results.
Balances hydration across different face zones. Niacinamide manages oilier areas while ferments nourish drier patches. Ideal match.
Hypoallergenic tested, fragrance-free, and free from common irritants. Some individuals with very reactive skin may want to patch test due to fermented ingredients.
Non-comedogenic formula with pore-refining Niacinamide. Oil-free and silicone-free. Exercise caution if you suspect fungal acne specifically.
Results timeline
MONTH 2–3Instant Hydration & Glow
Skin feels immediately plump and hydrated after the first application. A noticeable dewy glow appears, and skin texture feels smoother to the touch.
85% noticed instant hydrationVisible Texture Improvement
Rough, bumpy patches begin to smooth out. Clinical data shows 30.9% reduction in pore area and 11.39% reduction in skin roughness within 2 weeks.
70% reported smoother skinPore Refinement & Brightness
Enlarged pores appear visibly smaller. Skin tone begins to even out with reduced dullness. Makeup applies more smoothly on the refined surface.
65% noticed pore improvementSustained Radiance & Resilience
Cumulative benefits of fermented actives become more pronounced. Skin barrier is strengthened, reducing sensitivity. Consistent glass-skin finish with improved elasticity.
75% saw long-term improvementRatings by platform
8K+ REVIEWSPros & cons
BALANCEDPraised
- High concentration of premium fermented ingredients (63% total) at an affordable price
- Visibly smooths rough texture and refines pore appearance within 1-2 weeks
- Lightweight formula absorbs quickly without stickiness or pilling
- Fragrance-free, paraben-free, and hypoallergenic tested for sensitive skin
- Delivers an instant dewy glow — "glass skin" effect from first use
- Contains SK-II's star ingredient (Galactomyces) at a fraction of the price
- Layers beautifully under makeup without balling up
Criticized
- Glass dropper bottle can be inconvenient — risk of contamination and product waste
- Slightly tacky/viscous feel can be too heavy for very oily skin in summer
- 50ml bottle is relatively small for the price when used twice daily
- Not fungal acne safe — fermented ingredients may trigger Malassezia overgrowth
- Not vegan (contains goat milk and silk extract)
- Pore-minimizing results vary — some users see minimal change after weeks of use
- Contains PEG-90 which some users prefer to avoid
Budget-friendly alternatives (dupes)
DUPESContains 95% Galactomyces Ferment Filtrate — a higher concentration than Numbuzin. Thinner, more watery texture. Lacks Bifida Ferment Lysate but includes Niacinamide and Adenosine. Better for oily skin, less hydrating for dry skin.
Features Galactomyces Ferment Filtrate as the first ingredient with added rose water. More watery consistency and larger 150ml bottle. Lacks the concentrated Bifida complex and Niacinamide support. A gentle intro to fermented skincare.
Uses a proprietary fermented yeast extract (Saccharomyces) rather than Galactomyces/Bifida combo. Larger 150ml size offers better value per ml. More watery texture, less viscous. Strong brightening focus with different ferment profile.
Comparison with competitors
SIDE-BY-SIDEMissha Time Revolution FTE 5X
Storage & shelf life
12 MONTHS12 months after opening
Store in a cool, dry place away from direct sunlight. Keep the dropper cap tightly sealed after each use to prevent contamination and oxidation.
Frosted glass bottle with glass dropper pipette. Sturdy packaging that protects the fermented formula from light degradation.
Yes — 50ml is under the 100ml TSA carry-on limit. Glass bottle requires careful packing to avoid breakage.
Frequently asked questions
FAQYes. This serum does not contain retinoids, salicylic acid, hydroquinone, chemical sunscreens, or any other ingredients commonly flagged as unsafe during pregnancy. It has been screened and listed as pregnancy-safe by multiple dermatologist-reviewed databases. As always, consult your healthcare provider if you have specific concerns.
Use with caution. This serum contains multiple fermented ingredients (Bifida Ferment Lysate, Galactomyces Ferment Filtrate, Alteromonas Ferment Extract) and PEG-90, which may feed Malassezia yeast. While many users with acne-prone skin tolerate it well, those diagnosed with fungal acne should patch test carefully or consider alternatives from Numbuzin's No.1 line, which is formulated to be fungal acne safe.
Yes, with some precautions. This serum pairs well with Vitamin C — use Vitamin C in the morning and the serum morning or evening. With retinol, AHA, or BHA, it is best to alternate usage or apply the serum after waiting 15-20 minutes for the active to absorb. If your skin is new to actives, introduce them gradually to avoid over-sensitizing the barrier.
This serum is suitable for all skin types but performs best on dry, combination, and normal skin. Those with oily skin can use it but may find the slightly viscous texture a bit tacky in humid conditions. It is especially recommended for anyone with rough texture, enlarged pores, dull skin, or dehydrated skin showing early signs of aging.
Most users report an immediate hydration and glow boost from day one. Visible texture improvement typically appears within 1-2 weeks. Clinical tests show measurable pore reduction (30.9%) within 2 weeks of consistent use. For full brightening and anti-aging benefits, allow 4-8 weeks of daily application.
Apply after cleansing, toning, and any essence step. This serum goes before heavier treatments, eye cream, and moisturizer. In the morning, always finish with sunscreen. For maximum results, Numbuzin recommends pairing it with their No.3 Super Glowing Essence Toner — clinical tests showed 214% enhanced effectiveness when used together.
This serum has a low comedogenic rating of 1/5. It is oil-free, silicone-free, and does not contain known pore-clogging ingredients. The Niacinamide in the formula actually helps regulate sebum and reduce clogged pores. However, a small number of users with sensitive or very oily skin have reported mild closed comedones, likely due to the butylene glycol or fermented ingredients. Patch testing is always recommended.
The serum has a Period After Opening (PAO) of 12 months. Once opened, use within one year for optimal efficacy. Store in a cool, dry place with the dropper cap sealed tightly. Avoid letting the dropper touch your skin to prevent bacterial contamination. The 50ml bottle typically lasts 2-3 months with twice-daily use of 3-4 drops.
Verdict: The Numbuzin No.3 Skin Softening Serum delivers impressive value with its high-concentration fermented formula (63% active ferments) at a fraction of the cost of luxury alternatives like SK-II. It excels at smoothing rough texture, hydrating deeply, and delivering a visible glass-skin glow. Clinically tested with real results. The main trade-offs are its unsuitability for fungal acne-prone skin and a slightly tacky texture that may not suit very oily types. For anyone seeking smoother, brighter, more radiant skin — this K-Beauty gem is one of the best fermented serums at its price point.
Product Overview
Quick product notes are a great way to check if a product is free from commonly avoided ingredients by skincare enthusiasts. These preferences come about for different reasons depending on the ingredient such as personal experiences, sensitivities, health preferences & etc.
Just because a product is not free from a common preference does not mean it's a bad product! You can make a personal decision whether or not you want to use a product that contains these ingredients or not - click the labels of the preference to read more about them.
Quick Product Notes
Ever used a product that promised a certain effect but provided no results? It might not have contained any notable ingredients that could have been responsible for that promised effect. It doesn't matter what the marketing or packaging «promises» it can do, if it doesn't contain anything that can help - then the likelihood of it helping is low.
We help you identify key notable ingredients that have been shown to help with effects such as acne-fighting, brightening, UV-protection, wound healing & anti-aging to help you achieve your skincare goals smarter. Please note that different notable ingredients have varying levels of research behind them, some are extremely well proven yet some have mixed research in their efficacy.
Just because a product doesn't contain any notable ingredients doesn't mean it's bad. And a product with notable ingredients (or even many) doesn't necessarily guarantee the efficacy of the product performing these effects either. There are other factors such as ingredient quality, concentration and formulation that will ultimately determine this.
Be smart and use this as just a starting point for you to make more informed and smarter choices and compare it with reviews to see if the product is right for you
Notable Effects & Ingredients
Why are some products great for some people and horrible for others? Well everyone has different skin types and different reactions to the same ingredients.
We've identified a range of ingredients that are commonly regarded as potentially good or bad for those with Dry, Oily/Acne-Prone or Sensitive skin.
A product that contains good or bad ingredients for your skin type doesn't always flat out make the entire product good or bad for your skin. There are other factors such as ingredient quality, concentration and formulation that will ultimately determine your skins reaction.
One of the best ways to use this section is to troubleshoot products you've had bad experiences with in the past. Check if it contains any of the marked ingredients to point out suspect ingredients to avoid in the future!
Ingredients Related to Skin Types
Ingredient Safety Breakdown refers to the percentage % of ingredients in different risk categories as classified by EWG (Environment Working Group) if they are available. There are almost endless cosmetic ingredients and they are one of the few organisations globally that have assigned ratings to a lot of the more commonly used ingredients which is why we reference them.
EWG is seen by many to be more on the alarmist side in their assignment of health ratings resulting in rating ingredients as riskier than they actually are. We recommend using this a reference point rather than a strict guide of ingredient safety and to always do further research if into ingredients that you may find suspect.
Ingredient Safety Breakdown
Product ingredient list
| EWG | CIR | Ingredient Name & Cosmetic Functions | Notes |
|---|---|---|---|
| 1 |
Bifida Ferment Lysate
Skin Conditioning
|
Hydrating
Irritation
|
|
| 0 |
Galactomyces Ferment Filtrate
Humectant
|
Hydrating
Redness
Irritation
|
|
| 1 |
Butylene Glycol
Solvent, Skin Conditioning, Masking, Fragrance, Humectant, Viscosity Controlling, Viscositydecreasing Agent
|
Hydrating
|
|
| 1 |
Methyl Gluceth-20
Humectant, Moisturising
|
|
|
| 1 |
Water
Solvent, Skin Conditioning
|
|






