Numbuzin No.3 Blue Bio-Retinol Pore Refining Serum 30ml

100% Genuine (Adilsons policy) · Fragrance-Free · Alcohol-Free · FA-Conditional*

*Halal- and Vegan-Friendly badges are deliberately omitted here — see the Conscious and Permissible Formulation section for exactly why.

If enlarged pores read to you as "dirty" pores that need more scrubbing, that instinct is the problem, not the pores — pores don't have a scrub-away dirt layer, they have a rim of oxidized sebum and dead skin that responds to turnover-boosting actives like retinol, not friction.

Pros: a real retinoid dosed gently enough to be marketed as beginner-friendly; 10% niacinamide for oil control; fragrance-free; no drying alcohol.

Caveats: exact retinol % undisclosed; pregnancy-unsafe; not suitable under 16; Halal/vegan status is genuinely uncertain, not simply unbadged for marketing caution.

Classification: RED — not for under 16. This serum contains a real retinoid (Retinol) and Salicylic Acid, both of which accelerate epidermal turnover and modulate sebum production — processes that prepubescent and early-teen skin has not yet begun in the way adult and post-pubescent skin has, so the irritation risk outweighs the benefit at that age.

numbuzin's colorful, Gen-Z-oriented branding and heavy TikTok/social presence means this specific product can end up in a teenager's routine through peer recommendation rather than a skin need — check the actual ingredient list before letting a household teenager use it, not just the cute packaging.

Verified in-catalog, retinoid-free alternatives for younger or first-time users: SKIN1004 Madagascar Centella Poremizing Fresh Ampoule 30ml (primary), 50ml size, AXIS-Y Calamine Pore Control Capsule Serum, or numbuzin No.3 Softening Serum for texture without a retinoid.

Compatibility checklist: Bedside-compatible (no sink needed): yes. Requires rinsing: no. Requires precise dosage: loosely (2-3 drops), not exacting.

Applicable with unwashed hands: better with clean, dry hands given the retinol. Requires wait time: yes, 2-5 minutes before moisturizer if you're sensitive.

On a genuinely low-energy night, this can stand alone as a single-product routine (serum, then whatever moisturizer is already open) — but do not add it to a bare-bones routine on the same night as an exfoliating acid or a different retinoid product.

The formula is a light, non-tacky serum, not heavy or strongly scented, so sensory aversion is unlikely to be the reason to skip it on a hard day.

Step 1 — When: PM (evening) as the default; AM only if you are already tolerant and will wear SPF50+ without fail.

Step 2 — How much: 2-3 drops or roughly one pump, for the whole face.

Step 3 — How: Apply to fully dry, clean skin; pat, don't rub; wait 2-5 minutes before moisturizer.

Introduce this as the ONLY new product in your routine. Wait a full 14 days before adding anything else. This isolation window ensures you can identify whether any reaction is caused by this specific product.

1. Gentle cleanser (if needed)
2. Hydrating toner
3. Vitamin C serum (optional antioxidant lane, not this product)
4. Niacinamide/soothing layer
5. Moisturizer
6. Sunscreen SPF50+ PA++++ (non-negotiable)

AM restriction: This product is not designed as a daily AM step. Retinol increases photosensitivity and this formula has no built-in UV stabilization system disclosed by the brand, so AM use meaningfully raises the stakes on SPF compliance.

SPF mandate: If you do use this in the morning, SPF50+ PA++++ is mandatory, not optional, applied as the very last skincare step before makeup.

1. Oil cleanser (if wearing sunscreen/makeup)
2. Water cleanser
3. pH-balancing toner
4. Soothing/barrier serum (optional buffer)
5. Numbuzin No.3 Blue Bio-Retinol Pore Refining Serum
6. Moisturizer
7. Occlusive seal (optional, dry/AC nights only)

Skin cycling integration: Night 1 — a separate BHA/AHA exfoliant if you use one; Night 2 — this retinol serum; Nights 3-4 — recovery only (barrier serum + moisturizer, no actives). This spacing is exactly why the Conflict Solver below matters.

Technique: Pat/press into skin — do not rub. Friction on a retinol/BHA formula increases irritation risk rather than improving absorption.

Required skin state: Fully dry skin, not damp — retinol is best tolerated on a completely dry face; if you're new to retinol, wait 10-15 minutes after cleansing before applying.

Wait time: 2-5 minutes before moisturizer, longer if you notice any tingling that doesn't resolve quickly.

Hands deliver 100% of product. Cotton pads absorb approximately 30-40%. Use hands for this serum.

This is an encyclopedia map of all product types. You do not use all of these daily. You select modules based on your skin state.

Global rules:

• Viscosity ladder: thinnest → thickest, water-phase before oil-phase, treatments before seals.
• Wait-time defaults: watery layers 10-20s, serum layers 30-60s, before sunscreen 10-15 minutes.
• Amount defaults: toner/essence 5-8 drops; serum 2-3 drops or 1 pump; eye product ½ rice-grain per eye; gel moisturizer 1-1.5 peas, cream 1-2 peas; occlusive rice-grain to pea-size; sunscreen 2-finger rule for face.
• Hard cap rule: if the routine pills, stings, or feels heavy, reduce layers, not increase.

AM Maximum Stack (select modules based on your skin state, not all daily):

1. Rinse/gentle cleanse (optional)
2. pH-prep toner (optional)
3. Hydrating toner layers (optional)
4. Essence (optional)
5. Mist (optional)
6. Booster/soothing serum (optional)
7. Antioxidant lane — choose ONE (L-ascorbic acid Vitamin C or a gentler antioxidant)
8. Pigment support lane — choose ONE (TXA/arbutin/azelaic)
9. Hydration serum lane (HA/polyglutamic acid)
10. Oil-control/sebum lane — choose ONE
11. Peptide/repair lane (optional)
12. Eye product (optional)
13. Moisturizer
14. Optional sealing layer (dry/AC only)
15. Sunscreen SPF50+ PA++++ (non-negotiable)
16. Lip SPF (optional)

In AM, prioritize comfort and SPF adherence over stacking. In high humidity, fewer layers often perform better.

PM Maximum Stack:

1. Micellar (optional pre-cleanse)
2. Oil cleanser/balm (if SPF/makeup)
3. Water cleanser
4. pH-prep toner (optional)
5. Hydrating toner layers (optional)
6. Essence (optional)
7. Soothing/barrier serum (optional)
8. Anchor product (this serum) — on fully dry skin, wait 2-5 minutes before moisturizer
9. Targeted serum (optional, only if non-conflicting)
10. Moisturizer
11. Sleeping mask (optional)
12. Occlusive seal (optional)
13. Spot treatment (as needed)
14. Lip sleeping mask (optional)

Do not layer retinoids with AHA/BHA in the same night; keep "one lane" per night.

One-lane rule: Retinoid OR Exfoliation OR Strong Vitamin C (LAA) OR Acne-control active per routine; barrier/hydration can always accompany. If unsure, default to the safest lane — barrier/hydration — and reduce layers.

This is a water-thin to light-fluid serum — apply after any watery toners/essences and before your moisturizer, in classic thinnest-to-thickest order.

It sits in the water-phase, water-miscible category (Water, Butylene Glycol, Propanediol lead the INCI), so it layers cleanly under both gel and cream moisturizers without pilling from a phase mismatch.

The formula is not visibly gel-thick in the bottle and does not display the "looks thick, spreads thin" pseudoplastic behavior worth calling out separately.

Rest days matter: at least 3-4 recovery nights a week while your skin adjusts, because retinization inflammation compounds if you don't give the barrier recovery windows.

Exceeding a comfortable frequency does NOT produce faster results — it produces barrier damage, redness, and a longer path back to being able to use the product at all.

Purging vs. reaction: PURGING shows up in your usual breakout areas, stays surface-level, and resolves within 4-6 weeks as turnover speeds up. A REACTION shows up in new areas, involves burning, swelling, or hives, and gets worse rather than better — stop immediately if you see the second pattern.

Before starting this product, your routine MUST already include a gentle cleanser, a basic moisturizer, and daily SPF. Without these foundations, a retinol + BHA serum causes more harm than benefit.

Barrier index gate: if your skin stings on moisturizer, feels tight within 30 minutes of cleansing, or shows visible flaking, your barrier is below threshold. Start with the Anua Birch Moisture Boosting Cream for 1-2 weeks first.

Enlarged/visible pores: Retinol normalizes follicular keratinization (reduces the plug of dead cells and oxidized sebum that stretches the pore opening); Niacinamide and Salicylic Acid reduce surface sebum, both mechanisms compounding to make pores read visually smaller.

Rough texture: retinol-driven turnover smooths the stratum corneum surface over 4-6 weeks.

Early fine lines: retinoids are the best-evidenced OTC ingredient class for this, though visible change here takes 8-16 weeks, not 4-6.

What this product cannot do: it cannot physically shrink pore diameter (pores don't have muscle to contract) — it can only reduce what stretches them open; it cannot remove blackheads instantly; it cannot replace sunscreen as your primary anti-aging step.

SKIN1004 Madagascar Centella Hyalu-Cica Water-Fit Sun Serum 50ml — mandatory AM pairing; retinized skin is more UV-reactive, and this lightweight sunscreen won't pill under a retinol-thinned barrier. Alternatives if out of stock: Beauty of Joseon Relief Sun: Rice + Probiotics, numbuzin No.1 Clear Filter Sun Essence, or SKIN1004 Centella Air-Fit Suncream Light (mineral-only).

Anua Birch Moisture Boosting Cream 50ml — PM moisturizer to buffer retinization; alternatives: SKIN1004 Hyalu-Cica Sleeping Pack 30ml, numbuzin No.1 Pantothenic B5 Active Soothing Cream, or Anua Peach 77% Niacin Conditioning Milk.

Pilling pairs: layering this under a heavy silicone-primer sunscreen same morning can pill if applied too soon after moisturizer — wait the full 10-15 minutes before sunscreen, and reduce to one hydrating layer beforehand.

This is a conflict-solver for ACTIVE ingredients. If you run multiple actives, use these rules to avoid irritation, deactivation, and barrier damage.

One Active Lane per routine: in a single AM or PM routine, run only one primary active lane — Retinoid OR Acid Exfoliation OR L-Ascorbic Acid Vitamin C OR Benzoyl Peroxide OR strong acne lane. If you break a rule, don't push through — reduce frequency, split AM/PM, or alternate nights. Barrier override: if moisturizer stings or skin feels tight within 30 minutes of cleansing, pause all actives and run barrier-only for 3-7 days.

× AHAs (Glycolic/Lactic/Mandelic): never same night. Use skin cycling (Night 1 AHA → Night 2 this serum → Nights 3-4 recovery) or alternate nights.

× Separate BHA products: this serum already carries ~0.2% Salicylic Acid — don't add a second dedicated BHA toner/exfoliant on the same night; that's stacking the same lane twice, not adding benefit.

× L-Ascorbic Acid (pure Vitamin C): don't layer in the same routine. Use the classic split — Vitamin C AM, this serum PM.

× Prescription retinoids (tretinoin, adapalene): if you are currently using a prescription retinoid, do not also use this serum — you'd be doubling the same lane at an unknown combined strength. Consult your dermatologist before combining.

Scheduling Templates: Template A (AM/PM split) — AM antioxidant lane → moisturizer → SPF; PM this serum → moisturizer. Template B (4-night cycling) — Night 1 exfoliation, Night 2 this serum, Nights 3-4 recovery. Template C (alternate-night) — Mon/Wed/Fri this serum, Tue/Sat a separate acid if used, Thu/Sun recovery.

Do not layer retinoids with AHA/BHA in the same night; keep "one lane" per night. If unsure, default to the safest lane — barrier/hydration.

Pre-period breakouts happen because progesterone causes the pore lining to physically swell, narrowing the opening and trapping sebum beneath — which is exactly the mechanism this serum's retinol and BHA are targeting, so many users find the luteal phase is when it earns its keep, not when to skip it.

Water-Permeable — this is a light, water-based serum with no film-forming waxes or silicones high enough in the INCI to form an occlusive layer, so it does not physically block water from reaching the skin during wudu.

Adilsons provides this assessment based on the product's physical properties. Rulings on wudu validity vary between scholars. Consult your own trusted Islamic authority.

MYTH: "Large pores can be permanently shrunk with the right product." REALITY: pore size is largely genetic and sebum-volume driven — retinol and niacinamide reduce what makes pores look stretched, they don't change the pore's structural size.

MYTH: "'Bio-Retinol' means this is a gentle plant alternative with none of retinol's downsides." REALITY: the real INCI confirms actual Retinol is present — treat it with the same pregnancy exclusion and gradual-introduction protocol as any other retinoid, regardless of the marketing name.

MYTH: "More product, faster results." REALITY: overusing a retinol/BHA serum causes barrier damage and compensatory oil production — the exact opposite of the intended result.

In air-conditioned environments for extended hours, the glycerin and humectants in this serum can pull moisture from deeper skin layers instead of the air — always seal with a moisturizer when in AC for long stretches.

July-November sugar cane burning season raises PM2.5; since this is a PM-focused product it's largely unaffected, but if you do use it in the morning, layer a lightweight antioxidant beneath your SPF on high-burn days.

Mauritius tap water hardness varies by region — a pH-balancing toner before this serum helps counteract any calcium-stearate tightness left by hard-water cleansing.

*This concentration figure is not confirmed against a primary brand document — treat it as community/retailer consensus rather than verified fact.

*This ingredient's evidence tier for skin benefit is still emerging in the independent literature — brand marketing claims outpace the current independent research base.

Full INCI (in order): Water, Niacinamide, Butylene Glycol, Propanediol, Glycerin, Dipropylene Glycol, Pentylene Glycol, Glyceryl Glucoside, 1,2-Hexanediol, Caprylic/Capric Triglyceride, Glycereth-26, C12-14 Alketh-12, Polysorbate 20, Calcium Chloride, Salicylic Acid, Hydrolyzed Collagen, Gellan Gum, Honokiol, Panthenol, PPG-13-Decyltetradeceth-24, Hydrolyzed Sclerotium Gum, Chlorella Vulgaris Extract, Sodium Citrate, Centella Asiatica Extract, Glucose, Gardenia Florida Fruit Extract, Adenosine, Acacia Senegal Gum, Citric Acid, Panax Ginseng Adventitious Root Extracellular Vesicles, Dextrin, Lecithin, Cynanchum Atratum Extract, Silica, Centella Asiatica Callus Extracellular Vesicles, [--- Estimated 1% Line ---] Ethylhexylglycerin, Macadamia Ternifolia Seed Oil, Retinol, Hydrogenated Lecithin, Althaea Rosea Flower Extract, Brassica Campestris (Rapeseed) Sterols, Glycine, Cholesterol, Polyglyceryl-10 Laurate, Phytosteryl/Behenyl/Octyldodecyl Lauroyl Glutamate, Tocopheryl Acetate, Aluminum/Magnesium Hydroxide Stearate, and further ingredients that every source checked this pass had already truncated — full ingredient list beyond this point was not publicly available to us at the time of writing.

*Retinol sitting below this estimated line is normal and does not mean it's under-dosed the way a fairy-dusted marketing ingredient would be — cosmetic retinol is conventionally formulated well under 1% even at "full strength," so this position is consistent with a genuine, working (if gentle) retinoid rather than a trace amount.

Preservative system: 1,2-Hexanediol, Pentylene Glycol, and Ethylhexylglycerin function together as a preservative-booster system in this formula; no parabens are declared in the portion of the INCI available to us.

Fragrance status: Fragrance-Free — no Parfum/Fragrance ingredient appears anywhere in the declared INCI.

Scent: essentially neutral/no detectable added scent, consistent with the fragrance-free formulation.

EU 26 allergen screen: none detected in the declared INCI.

Alcohol disclosure: Alcohol-Free — no "Alcohol" or "Alcohol Denat." ingredient appears in the declared INCI.

Aspirin/salicylate sensitivity: this serum contains Salicylic Acid (BHA). If you have a known aspirin or salicylate sensitivity, patch test carefully or avoid this product — topical absorption is generally low but not zero.

Prescription retinoids (tretinoin, adapalene, isotretinoin): do not combine with this serum without dermatologist guidance — you would be running two retinoid-lane products at once, an unnecessary and irritating overlap.

Halal status: not asserted as Halal-Friendly here. No ethanol-type alcohol is present in the declared INCI, but the formula contains Hydrolyzed Collagen, whose animal source (bovine, porcine, or marine) is not disclosed by the brand anywhere found during this research pass — because that source cannot be confirmed as non-porcine, we are not applying the standard self-assessed Halal badge to this specific product. Muslims with strict requirements should treat this as an open question and consult their own scholars or contact the brand directly.

Vegan status: NOT vegan. The declared INCI contains Hydrolyzed Collagen and Cholesterol, both animal-derived ingredients in standard cosmetic sourcing (Cholesterol here is listed separately from the plant-derived "Brassica Campestris (Rapeseed) Sterols," so it should not be assumed to be the plant-sourced type).

*Cruelty-Free: Brand-stated policy. Not independently certified by Leaping Bunny, PETA, or equivalent third-party audit. Whether numbuzin sells in Mainland China retail (relevant to post-market animal-testing law) was not resolved during this research pass.

Microplastic-Free: Yes — no polyethylene, nylon, or acrylate microplastic-type polymers appear in the declared INCI.

MFDS classification: not confirmed as a Functional Cosmetic; treated as General Cosmetic in the absence of registration evidence.

Clinical evidence: the brand markets this serum as "clinically proven to improve 10 key pore-related concerns" with "93% improvement in reverse sebum-induced pore widening." No independently published study — institution, sample size, duration, peer review — was found behind this claim during research; treat it as a marketing claim rather than a verified clinical citation.

Evidence confidence: Retinol and Niacinamide as ingredient classes carry Strong independent evidence for pore/texture/oil concerns; the product-specific "93%" and "10 concerns" figures are Marketing-Only* until a published study surfaces.

numbuzin reuses the "No.3" numeral across genuinely different formulas over time and across markets — this serum is a distinct product from the brand's No.3 toners, and also distinct from a separately-marketed "No.3 Blue Bio-Retinol Pore Refining AMPOULE," which is a different format not currently confirmed in this store's catalog. No reformulation or recall history was found for this specific serum during this research pass.

Fungal Acne Safety: FA-Conditional. Several emulsifiers common to reactive FA-prone skin are present — Polysorbate 20, Lecithin, Hydrogenated Lecithin, Polyglyceryl-10 Laurate, and the Phytosteryl/Behenyl/Octyldodecyl Lauroyl Glutamate ester — alongside Macadamia Ternifolia Seed Oil, a moderate-risk oil due to its fatty-acid profile. If you're strictly FA-safe, patch test on the jaw for a week before full-face use.

Assessment: Low. The water-forward, low-silicone formula does not tend to ball up under most moisturizers.

Pilling risk rises specifically if you stack multiple hydrating toner/essence layers before this serum, then add a heavy-silicone sunscreen primer without waiting.

Mitigation: apply on fully dry skin, wait the full 2-5 minutes, pat rather than rub, and reduce the number of prior layers if you notice balling.

Fresh, this serum should look like a clear-to-pale watery fluid; any yellowing or an off, rancid smell signals oxidation of the retinol and antioxidant content — oxidized retinoids can generate free radicals rather than fighting them, so discard if you see this.

Storage: keep out of direct sun and away from bathroom humidity/heat where possible — Mauritius's ambient heat accelerates retinol degradation faster than temperate climates.

Spoilage signs: color change, separation that won't remix, a sour or rancid smell, or a texture that's become grainy. When in doubt, discard.

Patch test on the inner forearm for 24 hours, then behind the ear for 24 hours, before beginning facial use.

If you have an adverse reaction: STOP ALL ACTIVES. For 72 hours, use ONLY a gentle cleanser, plain moisturizer, and mineral SPF — no acids, retinoids, Vitamin C, exfoliants, or essential oils. After 72 hours, reintroduce one product per 14 days.

Emergency stop signals: hives, swelling, blistering, persistent burning, or breathing difficulty — seek emergency care.

Pregnancy alternatives (verified in-catalog, retinoid-free): SKIN1004 Madagascar Centella Poremizing Fresh Ampoule 30ml (primary), 50ml size, AXIS-Y Calamine Pore Control Capsule Serum, or numbuzin No.3 Softening Serum.

1. Applying nightly from day one instead of building up gradually.
2. Layering a second BHA/AHA product the same night.
3. Skipping SPF the morning after use.
4. Using on damp instead of dry skin.
5. Combining with a prescription retinoid without medical guidance.

Overuse threshold: using this more than once daily, or skipping recovery nights entirely for weeks on end, risks a compromised barrier that takes longer to repair than the results took to appear.

At 2-3 drops per use, a 30ml bottle provides roughly 90-120 applications.

Used at the recommended 3-4 nights a week, that's approximately 6-9 months of use; overdosing at nightly use with excess product can cut that to 3-4 months without improving results.

Reorder roughly 2-4 weeks before you expect to run out, to allow for shipping time.

This serum is the anchor of a PM pore-and-texture routine — its retinol accelerates turnover while niacinamide keeps oil in check, sitting in the treatment-serum slot right before moisturizer.

AM: cleanser (as needed) → hydrating toner → antioxidant/niacinamide layer → moisturizer → SPF50+ PA++++. PM: double cleanse → toner → this serum (2-3 drops, dry skin, wait 2-5 min) → moisturizer.

If your skin is barrier-compromised right now: pause this serum and run barrier-only for 3-7 days before restarting at 2x/week. If you are in AC all day: seal every application with a proper moisturizer, since the humectants here can otherwise pull moisture from deeper layers. If you are in luteal phase and breaking out along the jaw: keep using this serum, but add extra barrier support rather than skipping it.

Stock-true bundle: numbuzin No.3 Super Glowing Essence Toner + this serum + numbuzin No.1 Pantothenic B5 Active Soothing Cream + numbuzin No.1 Clear Filter Sun Essence SPF — a same-brand toner-to-SPF routine built around this serum's pore-refining lane.

After purchasing, you will receive our skincare education email series covering this product in depth.

The recommendations above are based on formulation synergy with this serum, not on margin or stock levels. If a pairing does not exist in our catalog, we say so. If you already own a product that fills the same role, use what you have first.

If you want pore-refining and texture support without a retinoid — because you're pregnant, under 16, new to actives, or simply retinoid-averse — SKIN1004 Madagascar Centella Poremizing Fresh Ampoule 30ml delivers a Centella-forward, sebum-control formula at a gentler, non-retinoid texture. The trade-off: it will not touch fine lines or deep turnover the way a real retinoid does — it manages oil and mild texture, not structural renewal.

Choose *Numbuzin No.3 Blue Bio-Retinol Pore Refining Serum* over the SKIN1004 Poremizing Fresh Ampoule if you need: real retinoid-driven turnover for pores AND fine lines, not just surface oil control.

Upgrade triggers (IF/THEN):

• If you've used a gentle niacinamide/centella serum for 8+ weeks with no further pore improvement, THEN this is a reasonable next step.
• If you're dehydrated-oily rather than truly oily, THEN pair this with extra hydration, don't avoid it.
• If your barrier is currently compromised, THEN do not upgrade yet — repair barrier first, regardless of how long you've waited.
• If you're new to actives entirely, THEN start with the ampoule for 4-6 weeks before adding a retinoid.

Timing and lane: PM only by default; occupies the Retinoid lane in the Conflict Solver above; do not run alongside a separate BHA/AHA or prescription retinoid.

Don't upgrade if: your barrier is below threshold; you can't commit to daily SPF; you're pregnant, nursing, or under 16; you're already running a separate retinoid or strong acid product.

If you match 2 or more upgrade triggers above, this serum is worth choosing. If not, the ampoule alternative is sufficient and safer. Consistency beats complexity.

This product's PRIMARY function is: retinoid-driven pore and texture refinement with sebum control. You do NOT need this if you already own an open, actively-used retinol or retinal product covering the same lane — finish that product first.

Check for an open product with the same primary active before buying new; most PAO windows on retinol products run 6-12 months, so buying a duplicate while an existing one is still fresh is genuine waste.

Stacking assessment: No Benefit if you're already using another retinoid nightly (same mechanism, same lane); Significant Benefit if your current routine has no retinoid and only surface-level pore products.

This product is sourced through authorized Korean distributors — primarily Craver Co., Ltd (South Korea), alongside other verified distribution partners. Craver is a major Korean beauty distributor and the parent company of SKIN1004, handling authorized distribution for multiple K-beauty brands. All products are shipped directly to Mauritius via verified channels.

For comprehensive information about how we verify authenticity, our layered verification system, and how to check your product at home, visit our dedicated Authenticity and Trust page.

Quick verification tips: check the batch code printed on the base of the pump bottle against the brand's official lookup where available; genuine bottles use a consistent pump-dispenser mechanism with no loose or rattling parts; packaging should carry Korean-language ingredient text alongside any English overlay sticker.

numbuzin built its identity around a numbered-line system rather than one hero ingredient — No.3 broadly covers texture/pore concerns, No.5 covers brightening/dark spots, No.9 covers anti-aging peptide/NAD+ work. The brand has become known internationally through social-media-driven virality, especially among younger K-beauty shoppers.

Worth knowing: numbuzin reuses its numbered names across genuinely different formulas over time (this exact serum is a distinct "No.3" product from the brand's own No.3 toner line), so always confirm you're looking at the specific formula you want rather than assuming numeral continuity.

No Reddit thread specifically discussing this exact serum was found during this research pass (r/AsianBeauty and r/SkincareAddiction searches returned nothing SKU-specific) — this doesn't mean no one has used it, only that a findable public thread doesn't yet exist in our research.

One independent blog review (Glooshi, not brand-affiliated) gave the serum 7.5/10 after two weeks of side-by-side testing against other retinol products, describing it as gentle enough for retinol beginners or sensitive skin that reacts poorly to stronger retinoids, with no irritation reported alongside oil-control and smoothness improvements.

Amazon lists this product for sale, but a specific star rating and review count could not be retrieved during this research pass — treat this section as an honest "limited public review data found," not as evidence the product performs poorly.

Sustainability: check the base of the bottle for local recycling codes; the pump mechanism is not designed to be refilled.

Is "Blue Bio-Retinol" the same as regular retinol? Not exactly a synonym, but it does contain genuine Retinol per the real INCI — the brand describes it as a blend of encapsulated pure retinol and a gentler bio-based fraction, not a retinoid-free substitute.

Can beginners use this? The brand markets it as beginner-friendly, and the one independent review found supports that framing — but "beginner-friendly" still means introduce gradually at 2x/week, not nightly from day one.

Will this help with blackheads specifically? Indirectly — by reducing the sebum and dead-cell buildup that forms blackheads over time — but it is not a same-day blackhead-removal product.

Can I use this with Vitamin C? Not in the same routine step — use Vitamin C in the morning and this serum at night, per the Conflict Solver above.

Is it safe while breastfeeding? No — see the Safety Notice at the top of this page; retinoids are not recommended during breastfeeding.

Retinoid

The umbrella term for Vitamin A derivatives (including Retinol) that speed up skin cell turnover.

Retinization

The temporary adjustment period — flaking, mild redness — as skin adapts to a new retinoid.

BHA

Beta-hydroxy acid (Salicylic Acid here); oil-soluble, so it can exfoliate inside the pore itself.

Encapsulated retinol

Retinol wrapped in a delivery shell designed to release more slowly, aiming to reduce surface irritation.

INCI

The standardized international naming system for cosmetic ingredients, listed in descending order of concentration.

Estimated 1% line

The approximate point in an INCI list below which ingredients are typically present at under 1% concentration.

Fairy dusting

Including a marketed ingredient at a concentration too low to be clinically meaningful.

Purging

Temporary, accelerated breakouts in your usual problem areas as turnover speeds up — different from an allergic reaction.

PAO

Period-After-Opening — the small jar icon showing how many months a product stays good for once opened.

Every product sold by Adilsons Beauty is 100% genuine, sourced through authorized Korean distribution channels. Full details on our verification system: Authenticity and Trust.

Our team is available to help you build a routine, troubleshoot reactions, and answer ingredient questions. WhatsApp: +230 5 778 2336.

For in-depth skincare education, visit our blog at adilsons.mu/blogs/k-beauty or subscribe to our email to get our guided education series delivered to your inbox.

Coverage: Island-wide delivery (Mauritius).

Processing and Timing: Orders process in 1-2 business days; usually ready by Day 3 for pickup by our delivery partners/regional team. Partner collection can take up to 1 week. After pickup, delivery typically takes 1-5 business days (weekdays only).

Express: May be available by region; request on WhatsApp: +230 5 778 2336.

Liquids/Sensitive Items: Serums, toners, liquid makeup (and kits containing liquids) are pickup or door-to-door only; checkout enforces this.

Scheduling: Deliveries run by region on set schedules; we will contact you the evening before.

Pickup: Citadelle Mall pickup available.

Returns: No change-of-mind exchanges.

Refunds (Summary): For defective/damaged on receipt (report within 48h), wrong item, or manufacturing defect within 6 months. Refunds via bank transfer (7-10 business days); card refunds may incur a 5% processor fee (fee not charged for defects/order errors). Opened skincare/personal-care items are non-returnable (except if damaged on delivery).

Source of Truth: This is a quick snapshot. If anything differs, the policy pages are final.

Store Policies: For the most up-to-date information, please review our Shipping Policy and Refund Policy.

Best for: non-pregnant adults 16+ with visible pores, rough texture, or early fine lines who want a real retinoid dosed gently enough to be beginner-workable, and who can commit to daily SPF.

Key benefits: a genuine Retinol (not a marketing-only substitute) paired with 10% Niacinamide and a mild BHA; fragrance-free and alcohol-free; independently reviewed as gentle enough for retinol beginners.

Keep in mind: exact retinol and BHA percentages are not disclosed by the brand; it is not vegan and its Halal status is genuinely unresolved, not simply unbadged; it is not suitable during pregnancy/nursing or under age 16.

Assessment: Consult Oncologist. This serum contains a real retinoid (Retinol) and Salicylic Acid — both are commonly restricted during active cancer treatment (especially with photosensitizing therapies or compromised skin barriers from treatment).

Consult your oncology care team before introducing any new skincare products during treatment.

Quick version:

• Week 1-2 — introduce alone, 2x/week, monitor for excess flaking or burning.
• Week 3-4 — increase to 3-4x/week if stable.
• Week 5+ — add one supporting product only if needed.
• If irritation appears at any point, use the 72-Hour Barrier Reset above rather than pushing through.

This product must be introduced as the ONLY new product. Wait 14 days before adding anything else.

Retinization discomfort — flaking, mild redness — is temporary; the correct response to it is reducing frequency, not stopping altogether, unless you hit the emergency-stop signals above.

Antioxidant pollution defense: Centella Asiatica Extract, Honokiol, and Tocopheryl Acetate (Vitamin E) in this formula provide mild free-radical defense against everyday oxidative stress, though this is a secondary benefit of a retinol-forward product, not its primary job.

AC/humidity swing interaction: the glycerin, propanediol, and other humectants here perform well pulling moisture from humid outdoor air, but can reverse and pull from your own skin during long air-conditioned stretches — always seal with a moisturizer in AC-heavy days.

Decision point — end of Week 2: any persistent redness or burning? YES → stay at Week 1-2 frequency for two more weeks. NO → proceed to Week 3.