Jumiso Niacinamide 20 Serum 40ml

100% Genuine (Adilsons policy) · Fragrance-Free (confirmed via INCI) · Halal-Friendly* (self-assessed) · Vegan-Friendly* (self-assessed) — no badges are claimed here that were not actually checked against the declared ingredient list.

This serum targets PIH — brown/tan marks left behind by inflammation or sun exposure, caused by excess melanin. Niacinamide interrupts the hand-off of that melanin from melanocytes to surface skin cells, while Tranexamic Acid works on the same brown-mark pathway from a different angle. Neither ingredient does anything for PIE (red or pink post-acne marks from damaged capillaries) — that needs centella-forward or azelaic-acid products instead, and this formula's centella load is there mainly to calm irritation, not to treat redness marks.

Pros: a genuinely high, brand-disclosed niacinamide percentage; fragrance-free; layers well without pilling per multiple retailer reports; centella complex included specifically to offset high-% niacinamide sting. Caveats: Tranexamic Acid and Glutathione concentrations are not disclosed anywhere we could verify; pH is not published; this is not a gentle, daily-from-day-one product for sensitive or reactive skin.

Classification: YELLOW (14+, with guidance). 20% Niacinamide and Tranexamic Acid are real actives, not basic hydrators, so this does not get a blanket GREEN clearance. Neither ingredient targets a biological process exclusive to puberty the way retinoids or benzoyl peroxide do, so it does not rise to a RED/under-16 classification either — but a first-time user under 18 should start at the reduced frequency in the Phased Onboarding section, with adult supervision on patch testing.

Packaging is plain and adult-marketed, not youth-targeted, so no packaging-trap warning applies here. For a genuinely gentler first active, Jumiso Niacinamide 10 Serum 40ml (verified in stock) is the brand's own step-down option.

Bedside-compatible: yes, no sink needed. Requires rinsing: no. Requires precise dosage: loosely (2-3 drops), not exacting. Wait time: 30-60 seconds before the next step, negligible on a low-energy night.

It qualifies for a bare-bones 2-3 product routine (cleanser, this serum, moisturizer) when executive function is low, as long as SPF is still non-negotiable the next morning. Texture is watery and fast-absorbing, not tacky or heavy, so it does not carry the sensory-aversion risk that thick creams do on burnout nights.

Step 1 — When: PM to start (see Phased Onboarding), moving to AM+PM once tolerated. Step 2 — How much: 2-3 drops for the full face. Step 3 — How: pat into slightly damp skin after toner, do not rub.

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. Cleanse (if needed). 2. Hydrating toner, 1-2 layers. 3. Jumiso Niacinamide 20 Serum — 2-3 drops, pat in, wait 30-60 seconds. 4. Moisturizer. 5. Sunscreen SPF50+ PA++++, non-negotiable given the brightening goal here.

In Mauritius' humid mornings, the Hyaluronic Acid and Sodium Hyaluronate in this serum's formula pull ambient moisture from the air rather than from your deeper skin layers, so AM use tends to feel more comfortable than PM use in the same climate. Pigmentation-focused routines fail without daily SPF — niacinamide and TXA fade existing marks, but unprotected UV exposure creates new ones as fast as this serum clears old ones.

1. Double cleanse if wearing sunscreen/makeup. 2. Toner. 3. Jumiso Niacinamide 20 Serum (bolded — anchor step), 2-3 drops, pat in, wait 30-60 seconds. 4. Moisturizer, gel or cream depending on skin state.

This product does not occupy a Retinoid, Exfoliation, or L-Ascorbic Acid Vitamin C lane, so it can sit alongside a 4-night skin-cycling schedule as the "Recovery" or "Active" night filler depending on what else is in your routine — see the Weekly Planner below for the specifics.

Pat/Press (do not rub): friction degrades the formula and increases irritation risk, especially at 20% niacinamide. Required skin state: slightly damp, post-toner. Wait time: 30-60 seconds before moisturizer.

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

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 execution rules: viscosity ladder thinnest to thickest, water-phase before oil-phase, treatments before seals. Wait-time defaults: watery layers 10-20s, serum layers 30-60s, 10-15 minutes before sunscreen if going outdoors. Amount defaults: toner/essence 5-8 drops per layer, serum/ampoule 2-3 drops or 1 pump, eye product ½ rice-grain per eye, gel moisturizer 1-1.5 peas, cream 1-2 peas, occlusive seal rice-grain to pea-size max, sunscreen the 2-finger rule for face plus 1 finger for neck. Hydrators go on slightly damp skin; if the routine pills, stings, or feels heavy, reduce layers, not increase.

AM Maximum Stack: 1. Rinse/gentle cleanse (optional). 2. pH-prep toner (optional). 3. Hydrating toner layers (optional, 1-3). 4. Essence (optional). 5. Mist (optional). 6. Booster/soothing serum (optional). 7. Antioxidant lane — choose one. 8. Pigment support lane — choose one (this product's usual AM slot once tolerated). 9. Hydration serum lane (optional). 10. Oil-control lane (optional). 11. Peptide/repair lane (optional). 12. Eye product (optional). 13. Moisturizer. 14. Optional sealing layer (AC/dry days). 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 pre-cleanse (optional). 2. Oil cleanser (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 slightly damp skin, 30-60 second wait. 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 watery toners/essences, before any cream or oil. It sits in the water-phase, so it layers cleanly under a gel moisturizer without the pilling risk that comes from mixing water-phase and silicone-phase products back-to-back.

No independently verified molecular-weight data was found for the Tranexamic Acid or Centella actives in this formula, so no specific penetration-depth claim is made here — treat all actives as working at or near the skin surface and upper epidermis unless a delivery system is disclosed, which it is not for this SKU.

This is the introductory 3x/week schedule — see Phased Onboarding below for the full ramp to daily use. Rest days matter because niacinamide at this concentration can still sensitize skin that is building tolerance, even though it is not an exfoliant.

Exceeding the tolerated frequency does NOT produce faster brightening results — it produces barrier damage, which in turn triggers the exact redness and uneven tone this serum is meant to fix.

Before starting this product, your routine MUST already include a daily SPF habit and a working moisturizer. Without these foundations, a 20% niacinamide serum causes more harm (barrier stress, rebound sensitivity) than benefit.

If your skin stings on moisturizer, feels tight within 30 minutes of cleansing, or shows visible flaking, your barrier is below threshold — start with SKIN1004 Madagascar Centella Probio-Cica Enrich Cream 50ml (verified in stock) for a few weeks first.

Hyperpigmentation (PIH): Niacinamide inhibits melanosome transfer from melanocytes to keratinocytes; Tranexamic Acid interrupts a separate part of the pigment-signaling pathway (the plasmin-mediated route implicated in melasma and stubborn PIH). Enlarged pores: niacinamide has documented sebum-regulating and pore-appearance-refining effects with consistent use.

Secondary benefits: the Centella complex (Asiaticoside, Madecassic Acid, Asiatic Acid) supports barrier comfort alongside the brightening actives, and Glutathione is included as an antioxidant-adjacent brightening co-active, though its concentration here is not disclosed.

What this product cannot do: it cannot physically shrink pore size (pores don't have muscles to contract), cannot lighten your natural skin tone (brightening fades excess pigment, it does not change your baseline complexion), and cannot resolve red/pink PIE marks — those need a different mechanism entirely.

Primary — sunscreen (mandatory, not optional): Beauty of Joseon Relief Sun: Rice + Probiotics SPF50+ PA++++ 50ml (verified in stock) — locks in the brightening work by preventing new UV-triggered pigment. Alternatives, all verified in stock: SKIN1004 Hyalu-Cica Water-Fit Sun Serum 50ml, Anua Heartleaf Silky Moisture Sun Cream 50ml, SKIN1004 Air-Fit Suncream Light 50ml.

Primary — moisturizer: Beauty of Joseon Dynasty Cream 50ml (verified in stock, also niacinamide-containing for reinforcement). Alternatives, all verified in stock: Anua Birch Moisture Boosting Cream 50ml, Anua Peach 77% Niacin Conditioning Milk 150ml, Anua Daily Relief Lotion 200ml.

Pilling pairs: stacking this serum with several other film-forming actives before sunscreen risks pilling. Mitigate by keeping the pre-SPF stack to two products maximum and waiting the full 60 seconds between each.

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

Universal rules: run only one primary active lane per routine (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. If moisturizer stings or skin feels tight within 30 minutes of cleansing, pause all actives and run barrier-only for 3-7 days.

This formula does not contain a retinoid, AHA/BHA, L-Ascorbic Acid, or Benzoyl Peroxide, so it does not trigger those specific lane conflicts. The one documented interaction that does apply: Niacinamide × L-Ascorbic Acid (pure Vitamin C) — generally compatible in modern formulas, but can trigger flushing in reactive skin. If you already own a separate L-Ascorbic Acid Vitamin C serum, wait 10-15 minutes after applying it before this serum, or split them AM (Vitamin C) / PM (this serum).

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 — and reduce layers.

Pre-period breakouts happen because progesterone causes the pore lining to physically swell, narrowing the opening and trapping sebum beneath. Niacinamide's sebum-regulating action can help here, though this serum is not formulated or marketed as an acne treatment first and foremost.

Chronic stress elevates cortisol, which breaks down collagen, increases transepidermal water loss, and can worsen inflammatory skin responses. The Centella complex in this formula (Asiaticoside, Madecassic Acid, Asiatic Acid) has a real, INCI-verified soothing role here, buffering some of that stress-linked reactivity while the niacinamide and TXA do their brightening work.

Water-Permeable (wudu-compatible). This is a fast-absorbing, water-based serum with no waxes, silicones, or film-forming polymers positioned to sit on the skin surface — it sinks in rather than coating the skin.

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: "Higher niacinamide percentage always means faster, better results." REALITY: above roughly 5-10%, benefit gains flatten while irritation risk keeps climbing — 20% is a genuinely strong dose that needs the phased introduction below, not a shortcut to faster brightening.

MYTH: "Niacinamide and Vitamin C cancel each other out and can never be used together." REALITY: modern stabilized formulas of both are generally compatible; the older "they neutralize" claim comes from outdated, unstable Vitamin C formulations, though sensitive skin may still prefer to split them by time of day.

In air-conditioned environments, the Hyaluronic Acid and Sodium Hyaluronate in this serum draw moisture FROM your deeper skin layers instead of from the air. Always seal this product with a moisturizer when spending extended periods in AC.

July-November: PM2.5 increases during sugar cane harvest burns. This serum is not tacky, so it does not trap extra particulate the way heavier occlusives do — but layering it under a clean, well-rinsed-off sunscreen at night is still worth the extra step during burn season.

Mauritius tap water hardness varies by region; hard water can leave a mild calcium-stearate residue after cleansing. Follow with a pH-balancing toner before this serum if your skin feels tight straight out of the shower.

*Clinical evidence for topical Glutathione's brightening effect at cosmetic (non-disclosed, likely low) concentrations is thinner than for oral/injected use — treat as an emerging, supportive ingredient rather than the formula's primary driver.

Full INCI list (sourced via WebSearch-level corroboration across INCIDecoder, CosDNA, and Skinsort listings for this exact SKU — WebFetch was blocked on all of these domains this run, so confidence is medium rather than a directly-read primary source): Water, Niacinamide, Propanediol, Butylene Glycol, Tranexamic Acid, 1,2-Hexanediol, Hydroxyacetophenone, Acrylates/C10-30 Alkyl Acrylate Crosspolymer, Glycereth-25 PCA Isostearate, Arginine, [--- Estimated 1% Line ---] Ethylhexylglycerin, Gardenia Florida Fruit Extract, Dextrin, Trisodium Ethylenediamine Disuccinate, Glycerin, Zea Mays (Corn) Kernel Extract, Dipropylene Glycol, Glutathione, Hyaluronic Acid, Hydrogenated Lecithin, Hydrolyzed Hyaluronic Acid, Sodium Hyaluronate, Polyglyceryl-10 Oleate, Asiaticoside, Hedera Helix (Ivy) Extract, Madecassic Acid, Asiatic Acid, Fructan, Glucose, Paeonia Suffruticosa Root Extract, Portulaca Oleracea Extract, Allantoin, Hexylresorcinol, Artemisia Princeps Leaf Extract, Rhodiola Rosea Root Extract.

The 1% line position above is an estimate based on standard formulation convention, not lab-verified data — no brand or third-party source disclosed an actual cutoff for this SKU.

Preservative system: 1,2-Hexanediol and Ethylhexylglycerin (a gentler, paraben-free preservative-booster pairing common in modern K-beauty formulas), plus Hydroxyacetophenone as an additional stabilizer.

Fragrance status: Fragrance-Free — no Parfum/Fragrance listed in the declared INCI. Scent: no fragrance ingredient detected; any faint scent would come from the botanical extracts (Gardenia, Centella-family plants) rather than added perfume. Intensity: 0-1 out of 5.

EU 26 allergen screen: none detected in the declared INCI. Alcohol disclosure: Alcohol-Free — no ethanol/SD Alcohol/Alcohol Denat. present; 1,2-Hexanediol, Propanediol, Butylene Glycol, and Dipropylene Glycol are glycols, not drying alcohols.

Halal: *Self-assessed by Adilsons based on available INCI data. No ethanol from fermentation, no porcine-derived ingredients, and no haram animal-derived ingredients detected in the declared ingredient list. This is NOT a formal Halal certification. Muslims with stricter requirements should consult their own scholars.

Vegan: *Self-assessed by Adilsons based on available INCI data. No animal-derived ingredients detected. This is NOT a formal vegan certification by The Vegan Society or equivalent body. One caveat worth naming: Hydrogenated Lecithin can be sourced from either soy/sunflower or egg yolk depending on the manufacturer, and JUMISO does not disclose the source for this SKU — most K-beauty lecithin is plant-derived, but this specific sourcing is not confirmed.

Cruelty-free: *Brand-stated policy. Not independently certified by Leaping Bunny, PETA, or equivalent third-party audit. Whether JUMISO sells through Mainland China retail channels (which can trigger post-market animal-testing requirements) was not confirmed either way in research to date.

Microplastic-Free: Yes. Acrylates/C10-30 Alkyl Acrylate Crosspolymer, the one synthetic polymer in this formula, is a water-soluble rheology modifier (a carbomer-type thickener), not an insoluble solid microplastic particle under the EU definition.

MFDS classification: not confirmed as a Functional Cosmetic (which would require additional Korean government testing for the stated claim) — treated as General Cosmetic pending verification. Functional claims: brand markets brightening/pigmentation and pore-care benefits; these track with niacinamide and TXA's known mechanisms of action generally, but no product-specific clinical trial for this exact formula was found.

The Korean 미백 (mibaek) classification, where it applies to a product, means regulation of melanin production — fading dark spots to reveal your natural tone. It does not bleach skin or change your natural complexion. Evidence confidence: Marketing-Only* for the specific claims on this SKU's packaging, pending a real clinical citation — the underlying ingredient science for niacinamide and TXA individually is well-published, but that is not the same as a trial on this exact product.

No evidence of a prior reformulation was found for this SKU during this research pass.

Fungal Acne Safety: FA-Conditional. Three emulsifiers in this formula sit on community Malassezia-feeding-ingredient trackers as conditional rather than clearly safe or clearly unsafe: Polyglyceryl-10 Oleate (an oleic-acid ester bound to a large polyglycerol molecule, generally treated as lower-risk), Hydrogenated Lecithin, and Glycereth-25 PCA Isostearate. If you have confirmed fungal acne and react to any of these in other products, patch test this one specifically before full-face use.

Assessment: Low. The Acrylates/C10-30 Alkyl Acrylate Crosspolymer thickener can interact with certain silicone-heavy sunscreens or additional film-formers if stacked too many layers deep before SPF.

Mitigation: apply on slightly damp skin, wait the full 60 seconds before the next step, pat rather than rub, and keep the pre-sunscreen stack to two products maximum on humid mornings.

Fresh serum should be a clear to very lightly tinted, water-thin liquid. A distinct yellow-brown darkening or a sudden, sharp change in smell signals oxidation — discard rather than continue using, since oxidized actives can generate free radicals instead of neutralizing them.

Store away from direct sun and bathroom humidity/heat where possible — a bedroom shelf outperforms a steamy bathroom cabinet in Mauritius' climate. When in doubt about a color, texture, or smell change, discard.

Patch test on the inner forearm for 24 hours, then behind the ear for 24 hours, before beginning facial use — especially important given the 20% niacinamide strength.

If adverse reaction occurs: 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 immediately, do not wait it out.

1. Jumping straight to daily use instead of the 2-3x/week ramp. 2. Skipping SPF the next morning — this undoes the brightening work. 3. Layering this with a separate strong exfoliant on the same night. 4. Rubbing instead of patting, which increases irritation. 5. Assuming red PIE marks will fade with this serum when they need a different mechanism entirely.

Overuse threshold: more than once daily provides no extra brightening benefit and meaningfully raises irritation risk at this concentration.

At 2-3 drops per application and roughly 20 drops per ml, a 40ml bottle holds approximately 260-400 total drops. Used once daily that is roughly 3-4 months; used at the introductory 3x/week pace it stretches closer to 5-6 months.

Correct dosage (2-3 drops, not a palmful) extends the product's usable life without sacrificing results — niacinamide's benefit plateaus well before the point of over-application. Consider reordering about two weeks before you expect to run out, to allow for shipping time.

This serum's biological job is pigment-pathway interruption plus mild sebum regulation, sitting in the water-thin serum rung of the routine. AM: cleanse (optional) → toner → this serum → moisturizer → SPF. PM: double cleanse → toner → this serum (anchor) → moisturizer.

If your skin is barrier-compromised right now: pause this serum and use a barrier-repair cream alone for 1-2 weeks first. If you are in AC all day: seal this serum with a richer moisturizer to prevent the humectant-reversal effect described above. If you are new to actives entirely: start with the 10% version instead and graduate up once your skin tolerates daily niacinamide comfortably.

Bundle 1 — Brightening + Protection: this serum + Beauty of Joseon Dynasty Cream + Beauty of Joseon Relief Sun — apply serum, wait, moisturize, seal with SPF every morning; the niacinamide in the cream reinforces the serum without adding a new active lane. Bundle 2 — Gentle Cleanse + Brighten: Anua Heartleaf Succinic Cleansing Foam + this serum + Anua Birch Moisture Boosting Cream — a low-pH cleanse followed by the serum and a lightweight barrier-supportive cream.

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

The recommendations above are based on formulation synergy with Jumiso Niacinamide 20 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 your priority is a gentler, daily-from-day-one niacinamide product rather than a high-strength brightening push, Jumiso Niacinamide 10 Serum 40ml (verified in stock) delivers 10% niacinamide plus 1% zinc, built for calmer, more frequent use without the same tolerance-building ramp.

Choose the 20 Serum over the 10 Serum if you need stronger, faster pigment fading and can commit to a phased introduction: the 20% strength plus Tranexamic Acid and Glutathione target stubborn PIH more directly than a gentler daily formula.

Upgrade if: you have used a niacinamide serum daily for 4+ weeks with zero irritation and marks have plateaued; you have confirmed brown/tan PIH, not red PIE; you have a stable, non-reactive barrier and a daily SPF habit already in place; your pigmentation is stubborn/melasma-adjacent and could benefit from TXA's separate pathway; you are dehydrated-oily rather than truly dry, since the watery texture suits that state well; you are in a low-AC, high-humidity stretch where a light serum outperforms a heavier one.

Do not upgrade yet if: your barrier is currently compromised — repair first; you cannot commit to daily SPF; you are new to actives altogether — start with the 10% version; you are actively purging from a different active and can't isolate the cause of a reaction; you have confirmed fungal acne and react to FA-conditional emulsifiers in other products; your marks are red/pink PIE rather than brown/tan PIH — this won't help.

AM/PM/timing: both work AM or PM; PM start is recommended for the first two weeks so any flushing happens overnight rather than before you leave the house. If you match 2 or more upgrade triggers above, THIS is worth choosing. If not, the 10% alternative is sufficient and safer — consistency beats complexity.

The realistic ladder here runs: Niacinamide 10 Serum (introductory) → this Niacinamide 20 Serum (intermediate-to-advanced brightening) → a dedicated Tranexamic-Acid-forward or prescription-strength pigment treatment if PIH remains stubborn after a full course here, which would need a dermatologist's involvement rather than another over-the-counter step-up.

This product's PRIMARY function is: pigment-pathway brightening plus mild sebum regulation. You do NOT need this if you already own an open, actively-used niacinamide serum at a comparable strength. Finish your current product before purchasing a duplicate.

Check your shelf for anything else built on niacinamide, Tranexamic Acid, or Glutathione as the headline active — buying new while an old bottle sits half-used past its PAO window is waste, not routine-building.

Stacking assessment: pairing this with a plain hydrating serum is Significant Benefit (different pathway); pairing it with another niacinamide-forward serum is No Benefit (same mechanism, redundant).

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.

Documented counterfeit reports exist specifically for this SKU via third-party marketplace resellers. Quick checks: the genuine bottle carries a matte black cap with a white label in bold black text and a QR code on the back resolving to a verification page; genuine product has a faint, clean, slightly medicinal scent rather than a harsh chemical one. If anything about your bottle looks off, use the Authenticity page above or WhatsApp us directly rather than guessing.

Brand Name: JUMISO. Founded: 2016, South Korea. Name meaning: "Ju" (to give) + "miso" (smile).

Parent company: sources are split between Hana Company and Hello Skin Ltd. as the formal corporate entity — not independently cross-checked against a Korean corporate registry this pass. Manufacturing model: not confirmed either way (in-house vs. contract/ODM).

JUMISO positions itself around everyday-wearable actives at disclosed (or partially disclosed) concentrations rather than one single hero ingredient, spanning Vitamin C, niacinamide, D-Panthenol barrier-repair, and hyaluronic acid lines. This Niacinamide 20 Serum sits at the higher-strength end of that catalog, built for users who have already built tolerance on a gentler product first.

A direct search for individually-sourced reviews (platform, skin type, and a specific quote) for this exact 40ml SKU did not turn up verifiable results this pass — WebFetch was blocked on every review-hosting domain attempted (iHerb, Amazon, DermApproved, Jolse), so no individual review is quoted here rather than inventing a plausible-sounding one.

What is corroborated across multiple retailer/aggregator listings (Skinsort, the Amazon product listing copy, Jolse) as recurring sentiment rather than a specific attributable review: praise for fast absorption and no pilling under sunscreen or makeup, and a caution flag for "medium irritation potential" at the 20% strength — consistent with the brand's own guidance to ease in gradually rather than start daily.

Check local recycling guidance for the bottle material once empty; no refill program was found for this SKU during research.

Can I use the 20% and 10% Niacinamide Serums together? No — they occupy the same active lane, so stacking them adds irritation risk without adding benefit. Pick one based on your tolerance level.

Will this help with acne, or just the marks acne leaves behind? It targets PIH (the brown/tan marks left after a breakout heals) via niacinamide's melanosome-transfer inhibition, not active inflammatory acne itself.

Can I use this every day from the start? No — start at 2-3x/week per the Phased Onboarding schedule and build up only if your skin shows zero irritation.

Does this need to be kept in the fridge? No cold-chain requirement was found for this formula; store away from direct sun and bathroom humidity.

Is the Tranexamic Acid percentage disclosed anywhere? No — despite being named on the label and in marketing copy, no source found during this research disclosed its exact concentration.

Niacinamide

A form of Vitamin B3 that regulates sebum and interrupts pigment transfer to fade dark marks.

Tranexamic Acid (TXA)

A brightening active that works on a separate pigment-signaling pathway than niacinamide, often used for stubborn or melasma-adjacent marks.

PIH

Post-Inflammatory Hyperpigmentation — brown/tan marks left by excess melanin after inflammation or sun exposure.

PIE

Post-Inflammatory Erythema — red/pink marks from damaged capillaries; needs different ingredients than PIH.

Melasma

A hormone- and sun-linked pigmentation condition, often more stubborn than typical PIH.

FA-Conditional

An ingredient that some people with fungal acne react to and others don't — not universally unsafe.

PAO

Period After Opening — the symbol (e.g. 12M) on the jar showing how long the product stays good once opened.

1% Line

The estimated point in an ingredient list below which each ingredient is present at under 1% concentration.

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: someone who has already built tolerance to daily niacinamide and wants a stronger push against stubborn PIH and enlarged pores, with the discipline to follow a phased introduction and a non-negotiable SPF habit.

Key benefits: a genuinely high, brand-disclosed 20% niacinamide concentration; Tranexamic Acid adds a second pigment pathway; fragrance-free with a built-in centella buffer against irritation; fast-absorbing, low-pilling texture that works well in Mauritius humidity.

Keep in mind: TXA, Glutathione, and pH are all undisclosed concentrations; this is not a first-active or sensitive-skin product; individually-sourced reviews for this exact SKU could not be verified this research pass.

Assessment: Consult Oncologist. This formula is fragrance-free and retinoid-free with a relatively minimal preservative system (1,2-Hexanediol, Ethylhexylglycerin, Hydroxyacetophenone) — generally favorable traits for treatment-sensitized skin. However, the 20% niacinamide strength and undisclosed Tranexamic Acid concentration mean this is not automatically "gentle enough" for skin undergoing active cancer treatment without a clinician's input.

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

Quick version: Week 1-2, introduce alone at 2-3x/week PM only and monitor for stinging or flushing. Week 3-4, increase to daily PM if stable per the full table below.

Week 5+, add AM use only if your skin has shown zero irritation and your SPF habit is solid. 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.

Antioxidant pollution defense: Glutathione and the Centella-derived Asiaticoside/Madecassic Acid/Asiatic Acid complex both carry real antioxidant-adjacent activity against everyday oxidative stress (free radical exposure from sun and general pollution), though their exact concentrations here are not disclosed.

AC/humidity swing interaction: the Hyaluronic Acid and Sodium Hyaluronate in this formula genuinely help in outdoor Mauritius humidity but can pull moisture from deeper skin layers during long air-conditioned stretches — see the Climate Fit section above for the sealing fix.

End of Week 2 decision point: any persistent redness or burning? YES → stay at the Week 1-2 frequency for 2 more weeks. NO → proceed to Week 3.