Skip to content
Live your passion Β· Discover Adilsons in MauritiusHelp & contact β†—
Shop by department

SOME BY MI YUJA NIACIN ANTI-BLEMISH SERUM 50ML

Save 16% Save 16%
Original price Rs 1,600.00
Original price Rs 1,600.00 - Original price Rs 1,600.00
Original price Rs 1,600.00
Current price Rs 1,350.00
Rs 1,350.00 - Rs 1,350.00
Current price Rs 1,350.00

Brand: SOME BY MI

Availability:
In stock
100% Authentic
Real Shops Mauritius
Islandwide Delivery
We Make It Right
No blind charges β€” we confirm everything before proceeding.

SOME BY MI Yuja Niacin Anti-Blemish Serum is a 50ml leave-on treatment built on a brand-stated ~83% Citrus Junos (Yuja) Fruit Extract base carrying ~10% Niacinamide β€” double the ~5% found in the brand's earlier "30 Days Blemish Care Serum." It works by slowing melanin hand-off to the skin surface while the citrus base supplies humectant hydration and a light natural Vitamin C contribution, fading post-blemish marks and dullness with consistent use over roughly 8-12 weeks. In Mauritius humidity it absorbs fast with no tacky residue. Not recommended as a first active for reactive/citrus-sensitive skin, or over active, open breakouts without a patch test first.

At-a-Glance (Is this for you?)

100% Genuine (Adilsons sourcing policy) Β· FA-Conditional Β· Vegan-Friendly* Β· Halal-Friendly* Β· Not Fragrance-Free (Limonene and Linalool confirmed present).

Attribute Detail
Brand Some By Mi (Perennebell Co., Ltd., Seoul)
Product Type Leave-on treatment serum
Net Volume 50ml
Key Active Niacinamide (~10%, brand-stated) + Citrus Junos Fruit Extract (~83%, brand-stated)
Skin Types Normal, combination, oily; caution for reactive/citrus-sensitive skin
Primary Concern Post-blemish marks (PIH), dullness, dark spots
AM/PM Suitability Both, though many users prefer PM to avoid layering under makeup
Routine Complexity Moderate β€” higher active load than the toner, worth a slower introduction
MFDS Classification Not independently confirmed as Functional Cosmetic β€” treat as General Cosmetic with a brightening/anti-blemish claim

If you've had months of dark marks lingering after every blemish clears, the frustration of feeling like your skin "won't let go" of the past is real β€” niacinamide at this concentration works, but on a melanosome-transfer timeline measured in weeks, not days.

PIH vs PIE: this serum's higher-dose niacinamide targets PIH (brown/tan flat marks from melanin) β€” it does not meaningfully treat PIE (red/pink marks from capillary damage), which needs centella, azelaic acid, or time.

Pros: a real 10% niacinamide concentration, not a trace amount; genuinely high yuja base; fast-absorbing, no pilling reported. Caveats: both Limonene and Linalool (two EU-26 fragrance allergens) are confirmed present; community feedback flags it as more likely to sting reactive skin than the brand's older, gentler 5% version β€” start slowly.

Age and Tween Suitability (Parental Guide)

Classification: YELLOW (14+ with guidance). A real 10% niacinamide concentration plus a genuinely high citrus-extract load with two declared fragrance allergens is a step above a basic hydrating product β€” not appropriate as a first-ever active for younger teenage skin without guidance.

Packaging is not youth-targeted, so the concern here is purely the active concentration and fragrance-allergen exposure, not marketing pressure.

Low-Energy and Burnout Viability (For tough days)

Bedside-compatible: yes. No rinsing, precise dosage is just drop-counting, applicable with unwashed hands. It is strong enough to function as the sole "active" step in a bare-bones 2-3 product routine (cleanser + this serum + moisturizer) when a full routine isn't happening.

Sensory note: the citrus scent is genuine and noticeable β€” on a scent-averse low-energy day, using less product rather than skipping it keeps you consistent without overwhelming your senses.

Quick Start (60-Second Essentials)

Step 1 (When): AM or PM (many prefer PM). Step 2 (How much): 2-3 drops or 1 pump. Step 3 (How): Press into skin after toner, on slightly damp skin, do not rub.

The One Rule: 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.

AM Routine Guide (Morning sequence)

1. Cleanse (optional) β†’ 2. Toner (optional, e.g. this line's toner) β†’ 3. Yuja Niacin Anti-Blemish Serum (2-3 drops, wait 30-60s) β†’ 4. Moisturizer β†’ 5. Sunscreen SPF50+ PA++++ (non-negotiable).

Mauritius humidity note: this serum's citrus-water base performs well in humid mornings, drawing in ambient moisture rather than pulling water from deeper skin β€” but the niacinamide/citrus combination still needs a sealed-in moisturizer, not skipped, or hydration evaporates by midday.

PM Routine Guide (Evening sequence)

1. Double cleanse if wearing SPF/makeup β†’ 2. Toner (optional) β†’ 3. Yuja Niacin Anti-Blemish Serum (bold anchor step, 2-3 drops, wait 30-60s) β†’ 4. Moisturizer.

Skin cycling integration: this serum carries no retinoid or exfoliating acid, so it has no fixed "lane night" β€” it's safe to run every PM alongside whatever active lane (retinoid, acid) you run that night, as long as you don't also stack a separate strong Vitamin C serum on the same night without reason.

How to Use (Amounts, technique, and tips)
Area Amount Pumps (if applicable)
Full face 2-3 drops ~1 pump (estimate, depending on dispenser)

Technique: Press/pat into skin β€” do not rub. Friction increases irritation risk from the citrus fraction, especially at this higher niacinamide load.

Required skin state: Slightly damp, after toner. Wait time: 30-60 seconds before moisturizer.

Hands deliver 100% of product; cotton pads absorb approximately 30-40% β€” use hands for this step.

Routine Encyclopedia (Where every product type fits)

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 β†’ thickest, water-phase before oil-phase, treatments before seals. Wait-time defaults: watery layers 10-20s, serums 30-60s, before sunscreen 10-15 min. Amount defaults: watery toner 5-8 drops; serum 2-3 drops; eye product Β½ rice-grain per eye; gel moisturizer 1-1.5 peas, cream 1-2 peas; occlusive rice-grain to pea; sunscreen 2-finger rule for face, +1 finger neck. Hydrators best on slightly damp skin; retinoids best on fully dry skin; keep exfoliating acids to one lane. Hard cap rule: if the routine pills, stings, or feels heavy, reduce layers, not increase.

AM Maximum Stack: 1. Rinse/gentle cleanse (optional) β†’ 2. pH-prep toner (optional) β†’ 3. Hydrating toner layers (optional) β†’ 4. Essence (optional) β†’ 5. Mist (optional) β†’ 6. Booster/soothing serum (optional) β†’ 7. Antioxidant lane (choose one) β†’ 8. Pigment support lane β€” this product's slot (choose one) β†’ 9. Hydration serum lane (optional) β†’ 10. Oil-control/sebum lane (optional) β†’ 11. Peptide/repair lane (optional) β†’ 12. Eye product β†’ 13. Moisturizer β†’ 14. Optional sealing layer (dry/AC only) β†’ 15. Sunscreen SPF50+ PA++++ (non-negotiable) β†’ 16. Lip SPF (optional).

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

PM Maximum Stack: 1. Micellar pre-cleanse (optional) β†’ 2. Oil cleanser/balm (if SPF/makeup) β†’ 3. Water cleanser β†’ 4. pH-prep toner (optional) β†’ 5. Hydrating toner layers (optional) β†’ 6. Essence (optional) β†’ 7. Soothing/barrier serum (optional) β†’ 8. Anchor product β€” this serum (bold placement, 2-3 drops, wait 30-60s) β†’ 9. Targeted serum (optional, non-conflicting only) β†’ 10. Moisturizer β†’ 11. Sleeping mask (optional) β†’ 12. Occlusive seal (optional) β†’ 13. Spot treatment (as needed) β†’ 14. Lip sleeping mask (optional).

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

Lane strictness: one-lane rule β€” 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.

Viscosity and Layering Science (Where it fits)

Tier: light fluid β€” thicker than a toner, thinner than a moisturizer. Apply after toner/essence, before moisturizer.

Layering rule: thinnest to thickest, water-phase to oil-phase β€” this serum sits mid-routine, never before a watery toner and never after a cream.

Phase compatibility: water/humectant-phase (Caprylic/Capric Triglyceride is present but at a supporting emollient role, not enough to make this an oil-phase product) β€” layers cleanly under most moisturizers.

Weekly Planner (Scheduling actives)
Day AM PM
Mon-Sun Optional (skip if also running a strong AM Vitamin C elsewhere) Yuja Niacin Anti-Blemish Serum (daily is fine at this concentration)

Rest days: not required for niacinamide itself, but if you introduce this while also running a retinoid or exfoliating acid, keep this serum PM-only on non-active nights for the first 2 weeks.

Overuse warning: using more than 2-3 drops per application does not speed up brightening β€” it increases citrus-fragrance exposure and irritation risk without added benefit. Exceeding the recommended amount does NOT produce faster results β€” it produces barrier damage.

What to Expect (Results timeline)
Phase Timeframe What You Will Notice
Immediate 0-24h Fast-absorbing, hydrated, citrus-scented finish. Temporary, not structural.
Adjustment Week 1-2 Possible mild tingling/stinging at this higher concentration, especially on reactive skin; discontinue if burning persists beyond 30 seconds.
Epidermal Turnover Week 4-6 First real brightening/tone-evening results, per a fresh 2026 third-party review reporting more even, healthy-looking skin at this stage.
Maintenance Plateau Week 8+ Results stabilize with continued use; do not increase dosage chasing more.

Purge vs Reaction: PURGING occurs in your usual breakout areas, stays surface-level, and resolves in 4-6 weeks. A true REACTION occurs in NEW areas, involves burning/swelling/hives, and worsens without improvement β€” stop immediately if you see reaction signs.

Who Should Use This (Clinical triage)

Prerequisites: before starting this serum, your routine MUST already include a daily cleanser, a basic moisturizer, and a daily SPF habit. Without these foundations, a 10% active serum causes more harm than benefit.

Graduation ladder: if this feels too strong, the brand's own gentler ~5% niacinamide "30 Days Blemish Care Serum Mask" sheet-mask format (available at Adilsons) offers a lower-dose way to trial the same actives before committing to this leave-on serum.

Status Guidance
PROCEED IF Barrier intact, consistent SPF user, not pregnant, no active eczema, age 16+
PAUSE IF Compromised barrier, no SPF habit yet, currently purging from another active
STOP/CONSULT IF Active eczema/psoriasis on the face, known citrus/Limonene/Linalool allergy, currently on prescription acne treatment without dermatologist sign-off on layering

Barrier index gate: if your skin stings on moisturizer, feels tight within 30 minutes of cleansing, or shows visible flaking β€” your barrier is below threshold. Start with a plain barrier-repair moisturizer first.

Skin Type Compatibility
Skin Type Compatibility Notes
Oily Good Lightweight, fast-absorbing, no heavy oils
Combination Good Absorbs evenly across mixed zones
Dry Moderate Treat as an active step, not a moisturizer β€” pair with a rich cream
Sensitive/reactive Caution Two confirmed EU-26 allergens (Limonene, Linalool) plus a real 10% active load β€” patch test mandatory
Targeted Concerns (What it treats)

Post-blemish dark marks (PIH): Niacinamide at ~10% inhibits melanosome transfer from melanocytes to keratinocytes, fading brown/tan marks over weeks. Dullness: the humectant citrus base plus Vitamin C content supports overall radiance.

PIH vs PIE: addresses PIH; does not treat PIE (red/pink capillary-damage marks).

What it cannot do: it cannot shrink pores, cannot lighten your natural skin tone beyond your genetic baseline, and is not a treatment for active inflammatory acne lesions themselves β€” it works on the marks left behind, not the breakout mechanism.

Nutritional co-factor note: for breakout-prone skin, a high-glycemic diet and dairy intake are linked to an insulin/IGF-1 pathway that can increase sebum production β€” this is a topical-plus-dietary framing, not a medical claim, and this serum addresses the topical side only.

Best Paired With (Synergistic pairings)

Primary pairing β€” SOME BY MI Yuja Niacin Toner (in stock): same-line prep step that preps skin with a lighter niacinamide dose before this stronger serum.

Alt 1 β€” Beauty of Joseon Dynasty Cream (in stock): a niacinamide+adenosine hanbang-style moisturizer to seal this serum in, since the line's own gel cream is currently out of stock.

Alt 2 β€” Anua Peach 77% Niacin Conditioning Milk (in stock): a lighter-texture 2% niacinamide moisturizer alternative for oilier skin types.

Alt 3 β€” Beauty of Joseon Relief Sun: Rice + Probiotics (in stock): daily SPF is mandatory for any brightening routine to actually work.

Conflict Solver (Active-ingredient interaction rules)

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

Γ— High-% Niacinamide + a separate pure L-Ascorbic Acid (LAA) serum: this serum's own natural Vitamin C content is mild, but if you also run a strong LAA product, don't layer both in the same routine without reason β€” apply LAA first (AM), wait 10-15 minutes, then this serum, or split LAA AM / this serum PM to reduce flushing risk in reactive skin.

Γ— Retinoids/direct acids: this serum carries no retinoid or exfoliating acid itself, so it has no fixed lane β€” but if you introduce it alongside a NEW retinoid or acid at the same time, that breaks the "one new product at a time" rule (Sec 5B). Stagger them by at least 14 days.

Γ— Copper peptides: if you use a copper-peptide product, apply peptides first (AM), this serum later (PM), since the citrus acidity here can modestly destabilize peptide bonds if layered immediately.

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

Hormonal Cycle Synchronization
Phase Days Skin Behavior Use This Product?
Follicular ~1-13 Generally calmer, less reactive Yes, normal use
Ovulatory ~14-16 Peak radiance for most Yes, normal use
Luteal ~17-28 Increased sebum, breakout risk rises Yes β€” the niacinamide/anti-blemish focus is genuinely relevant here
Menstrual ~1-5 (cycle restart) Often more reactive/sensitive skin Consider reducing frequency if stinging increases

Pre-period breakouts happen because progesterone causes the pore lining to physically swell, narrowing the opening and trapping sebum beneath β€” this serum's niacinamide won't prevent that swelling, but it can reduce the dark-mark aftermath once a blemish resolves.

Wudu and Prayer Compatibility

Water-Permeable (wudu-compatible). This is a light-fluid serum that absorbs into skin rather than forming an occlusive film.

No removal step is needed before ablution water contact, based on its non-occlusive physical properties.

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 Replacement (Common misconceptions)

MYTH: "A stronger niacinamide percentage always works faster." REALITY: niacinamide's mechanism (melanosome-transfer inhibition) operates on a fixed biological turnover timeline β€” 10% doesn't halve the wait time versus 5%, it primarily changes tolerance and potency ceiling, not speed.

MYTH: "This serum will clear active acne." REALITY: it fades the dark marks blemishes leave behind (PIH); it does not treat the inflammatory acne mechanism itself.

Climate Fit for Mauritius
Season Conditions Adjustment
Summer (Dec-Mar) High heat/humidity, more sweat Fast-absorbing texture performs well; ensure SPF follows within the mandatory window
Winter (Jun-Sep) Drier, cooler Follow with a richer moisturizer than in summer to lock in the serum's hydration
Cyclone Season (Jan-Mar) Humidity spikes No change needed

AC environment warning: this serum's humectant citrus base can pull moisture from deeper skin layers instead of the air during long AC exposure β€” always seal with a moisturizer.

Sugar cane burning season (July-November): PM2.5 increases during this period; this serum's antioxidant Vitamin C content supports AM pollution defense, so consider keeping AM use consistent through this season rather than skipping to PM-only.

Complete Ingredient Transparency
Ingredient Concentration Evidence Grade Mechanism Source
Citrus Junos (Yuja) Fruit Extract ~83% (brand-stated) Traditional/Emerging Humectant carrier, natural Vitamin C content Plant
Niacinamide ~10% (brand-stated) Strong Inhibits melanosome transfer; supports barrier function Synthetic
Alpha-Bisabolol ~0.5% (source-quantified) Moderate Anti-inflammatory, soothing Plant/Synthetic (chamomile-derived or nature-identical)
Sodium Ascorbyl Phosphate Not disclosed Moderate Stable Vitamin C derivative, antioxidant support Synthetic

*Clinical evidence for the niacinamide claim rests on well-established ingredient-class literature at this concentration range, not a SKU-specific clinical trial for this exact serum.

Full INCI (partial β€” known incomplete): Citrus Junos Fruit Extract, Niacinamide, Caprylic/Capric Triglyceride, 1,2-Hexanediol, Hydrogenated Poly (C6-14 Olefin), [--- Estimated 1% Line ---] Alpha-Bisabolol, Carbomer, Arginine, Brassica Campestris Seed Oil, Xanthan Gum, and additional botanical extracts (not fully captured in the source excerpt available at the time of writing).

*This INCI list is known-incomplete β€” the source excerpt cut off before the full ingredient list. A follow-up web check corroborated the presence of Glycyrrhiza Glabra (Licorice) Root Extract and confirmed both Limonene and Linalool as declared fragrance allergens, but the complete ordered list has not yet been independently verified against a direct primary-source fetch. Full ingredient list beyond what's shown here is not publicly confirmed by Adilsons at the time of writing.

Preservative system: 1,2-Hexanediol functions as a paraben-free preservative-booster, consistent with the rest of this line's formulation approach.

Allergens and Fragrance Disclosure

Fragrance status: Not Fragrance-Free β€” Essential-Oil-Derived. Multiple retailer/review sources independently attribute the scent to the citrus/yuja essential-oil fraction rather than a separate synthetic fragrance additive.

Scent: Noticeable fresh citrus. Intensity: 3/5, dissipates within 1-5 minutes.

EU-26 allergen screen: Limonene AND Linalool both confirmed present via corroborating sources.

Alcohol disclosure: No drying alcohol identified in the captured (partial) INCI.

Cross-Reactivity and Drug Interactions

Alpha-Bisabolol is most commonly chamomile-derived β€” those with a genuine ragweed/chamomile-family allergy should patch test before facial use, since documented cross-reactivity exists in that allergy group.

No other cross-reactive ingredient categories (snail mucin, propolis/bee venom, papaya enzyme, chitosan) were identified in this serum's captured INCI.

Conscious and Permissible Formulation

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 (partial) 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 in the captured portion of the ingredient list. This is NOT a formal vegan certification by The Vegan Society or equivalent body. Note: the INCI is known-incomplete, so this assessment should be treated as provisional pending a full ingredient list.

Cruelty-free: *Brand-stated policy. Not independently certified by Leaping Bunny, PETA, or equivalent third-party audit.

Microplastic-Free: No microplastic-forming polymer identified in the captured INCI; treat as effectively microplastic-free based on available information.

Evidence, Regulation and Claims

MFDS classification: marketed as a brightening/anti-blemish functional item; not independently verified against a public MFDS Functional Cosmetic filing β€” treat as General Cosmetic with ingredient-supported claims.

Whitening translation: the Korean "λ―Έλ°±" (mibaek) classification, where applicable, means regulation of melanin production to fade dark spots β€” not bleaching or altering your natural complexion.

Evidence confidence: Medium β€” niacinamide's mechanism is well-established at this concentration range; no SKU-specific clinical trial for this exact serum was located, though a fresh 2026 third-party review corroborates real-world 4-week brightening results consistent with the ingredient-class evidence.

Product Identity and Provenance
Field Detail
English Name Yuja Niacin Anti-Blemish Serum
Brand Some By Mi
Product Line Yuja Niacin
Net Volume 50ml
Country of Manufacture South Korea (brand-stated)

Reformulation history: this "Anti-Blemish Serum" (10% niacinamide) is a distinct, newer, higher-strength formula from the brand's older "30 Days Blemish Care Serum" (5% niacinamide) β€” retailers describe it as roughly "2x more powerful." Both versions may still appear across different retailers, so check the box for the niacinamide percentage if this matters to you.

Sensory and Chemical Profile
Attribute Detail
Texture Light fluid serum
Viscosity Tier Light fluid
pH Not publicly disclosed
Absorption Speed Fast, under 60 seconds, no tacky residue reported
Finish Healthy glow, non-greasy

Fungal Acne Safety: FA-Conditional. Brassica Campestris (Rapeseed) Seed Oil and Hydrogenated Poly (C6-14 Olefin) are inconsistently rated across FA-safety trackers β€” patch test if you're FA-prone.

Pilling Risk and Texture Mechanics

Assessment: Low. Community feedback consistently describes it as fast-absorbing with no pilling reported.

If pilling does occur, it's most likely from stacking too many treatment layers before this serum β€” reduce to toner + this serum + moisturizer and rebuild from there.

Stability, Spoilage and Oxidation

Color baseline: pale yellow. A shift to a noticeably darker amber/brown can indicate oxidation of the Vitamin C content, generating free radicals rather than fighting them.

Storage: keep out of direct sunlight and away from bathroom heat/humidity extremes β€” Mauritius heat accelerates oxidation of Vitamin-C-family ingredients.

Spoilage signs: color darkening, sour smell replacing the citrus scent, texture separation that won't re-mix. When in doubt, discard.

Safety and Patch Test Protocol

Patch test: inner forearm (24h), then behind the ear (24h), before facial use β€” non-negotiable given the confirmed dual fragrance allergens and 10% active load.

72-hour barrier reset: if you have an adverse reaction, STOP ALL ACTIVES. For 72 hours, use ONLY a gentle cleanser + plain moisturizer + 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 β€” seek emergency care immediately.

Troubleshooting Guide
If You Experience Likely Cause Solution
Stinging/redness on application Fragrance-allergen sensitivity or too-fast introduction at 10% Drop to every-other-day use for 2 weeks; if persistent, run the 72-Hour Reset
Breakout weeks 2-6 Purging vs. reaction See What to Expect above; stop if signs point to reaction
Won't apply over active breakouts Genuine anecdotal caution from citrus-sensitive reviewers Apply around active lesions, or wait until inflammation subsides
No results after 8 weeks Wrong concern (PIE not PIH) or inconsistent SPF Confirm marks are brown/tan; verify daily SPF adherence
Common Mistakes to Avoid

1. Jumping straight to daily use at full strength without a patch test. 2. Skipping SPF, which undoes the brightening work by re-triggering pigmentation. 3. Layering this under a separate strong Vitamin C serum for no reason, risking unnecessary irritation. 4. Applying directly onto active, inflamed breakouts before testing tolerance. 5. Expecting the 10% concentration to work twice as fast as the 5% version β€” it doesn't; the biological timeline is the same.

Overuse threshold: more than 2-3 drops per use does not accelerate results β€” it increases fragrance-allergen exposure without added benefit.

Usage Economics (How long it lasts)

Usage math: at 2-3 drops per use, once or twice daily, a 50ml bottle provides roughly 80-100 applications.

Lifespan: at recommended dosage, this typically lasts 6-10 weeks depending on once vs. twice-daily use; overdosing shortens this without improving results.

Reorder timing: reorder roughly 2 weeks before you expect the bottle to run out.

Complete Your Routine (Exact routine + pairings)

This serum is the treatment step of the Yuja Niacin line β€” its higher niacinamide dose makes it the "workhorse" for post-blemish marks, best layered between the toner and moisturizer.

AM: 1. Cleanse (optional) β†’ 2. Toner (optional) β†’ 3. Anti-Blemish Serum (2-3 drops, wait 30-60s) β†’ 4. Moisturizer β†’ 5. Sunscreen. PM: 1. Cleanse β†’ 2. Toner (optional) β†’ 3. Anti-Blemish Serum β†’ 4. Moisturizer.

If your skin is barrier-compromised right now: pause this serum and use only a gentle cleanser + moisturizer + SPF for a week before reintroducing. If you already run a strong LAA Vitamin C serum: use that first AM, this serum PM, to avoid stacking Vitamin C forms. If you're in your luteal phase and breakout-prone: this serum's anti-blemish focus is genuinely relevant now, but don't increase frequency beyond the recommended dose to "fight" a flare.

Stock-true bundle: Anti-Blemish Serum + Yuja Niacin Toner + Beauty of Joseon Dynasty Cream β€” toner preps, this serum treats, cream seals with its own niacinamide/adenosine support while the line's own gel cream is out of stock.

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

The recommendations above are based on formulation synergy with the Anti-Blemish 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.

Is This the Best Choice? (Mindful alternatives)

Primary alt β€” Beauty of Joseon Glow Serum: Propolis + Niacinamide (in stock): a gentler 2% niacinamide option for skin that finds this serum's 10% too strong or the fragrance allergens too risky.

Alt 2 β€” MARY&MAY Niacinamide+Chaenomeles Sinensis Serum (in stock): a clean ~2% niacinamide formula with no fairy-dusting flagged in its own research, and no confirmed EU-26 allergens β€” a lower-fragrance-risk option.

Alt 3 β€” Anua Green Lemon Vita C Serum (in stock): a genuine 20% L-Ascorbic Acid alternative for those who want a stronger, more clinically-established Vitamin C lane instead of niacinamide-first.

Why Choose This Over the Alternative?

Choose Yuja Niacin Anti-Blemish Serum over Beauty of Joseon Glow Serum if you need a genuinely higher-strength 10% niacinamide dose for stubborn post-blemish marks, not a maintenance-level 2% dose.

Upgrade Axis Better in This Trade-off Who Benefits
Active strength ~10% Niacinamide vs. ~2% Confirmed dual fragrance allergens (Limonene + Linalool) vs. Glow Serum's gentler profile Those with stubborn, longstanding PIH who tolerate fragrance
Risk profile β€” Higher irritation risk, especially on first use Fragrance-sensitive users should choose the Glow Serum or MARY&MAY alternative instead

If your barrier is currently compromised: do not upgrade to this yet β€” repair first with a plain moisturizer, then reintroduce. If you're new to niacinamide altogether: start at the 2% Glow Serum level before stepping up to this 10% formula.

Don't upgrade if: known citrus/Limonene/Linalool allergy; new to actives; barrier below threshold; already running a same-mechanism niacinamide product with no plateau in sight.

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

Graduation Pathway

This serum sits on a real, brand-documented strength ladder within the Yuja Niacin family: the gentler ~5% niacinamide 30 Days Blemish Care Serum Mask (sheet-mask trial format, in stock) β†’ this ~10% Anti-Blemish leave-on Serum. If 10% feels too strong even after a proper patch test and gradual introduction, step back down to the mask format rather than pushing through irritation.

The No-Buy Redundancy Check

This product's PRIMARY function is: high-strength niacinamide anti-blemish/brightening serum. You do NOT need this if you already own an open, actively-used niacinamide serum at 8%+ concentration β€” finish that one first.

Inventory audit: check for an open serum with a comparable niacinamide dose. PAO (typically 6-12 months once opened) means buying a duplicate while the old one expires is waste.

Stacking assessment: No Benefit if you already run another 8-10% niacinamide serum (same mechanism); Significant Benefit if your current routine only has a low-dose (2-5%) niacinamide product and hasn't progressed your PIH concern.

Sourcing and Authenticity

This product is sourced through authorized Korean distributors β€” 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 checks for this SKU: confirm the box states "Anti-Blemish Serum" (not the older "30 Days Blemish Care Serum" name) if the 10% concentration matters to you, check the batch code on the box base, and inspect for print-quality issues versus genuine brand photography.

About Some By Mi
Field Detail
Parent Company Perennebell Co., Ltd. (South Korea)
Founded 2016
Headquarters Seoul, South Korea
Hero Ingredient Galactomyces (fermented ingredients) and a tri-acid AHA/BHA/PHA complex, brand-wide
Manufacturing Marketing states "manufactured in Korea"; in-house vs. contract manufacturing not independently confirmed

Some By Mi built its global reputation on the AHA-BHA-PHA 30 Days Miracle line before expanding into fruit-extract-led lines like Yuja Niacin, which iterates its own formulas over time β€” this serum's 10% niacinamide "Anti-Blemish" version is itself a documented upgrade from the brand's earlier 5% "Blemish Care" formula.

Genuine Community Experiences

Paraphrased community feedback describes the serum as lightweight and fast-absorbing with a "fresh, healthy glow" finish, and several users positioned it as noticeably stronger and faster-acting on dark spots than the brand's older 5% version. A fresh 2026 third-party review reported that after 4 weeks of use, skin looked more even-toned and felt healthier, not just brighter, describing it as affordable and effective across a range of skin types.

On the caution side, sensitive-skin reviewers repeatedly flagged the higher niacinamide load combined with the citrus extract as more likely to cause redness or stinging than the gentler older formula, with one reviewer specifically noting they would avoid applying it directly over active breakouts due to the citrus peel oil content. No verified Reddit thread specific to this exact serum was located at the time of writing.

Packaging and Practical Details
Attribute Detail
Primary Packaging 50ml bottle, dropper or pump dispenser
Hygiene Rating Good β€” dropper/pump limits air and hand contact with bulk product
Travel-Friendly Good β€” 50ml fits most carry-on liquid allowances

Sustainability: check local recycling guidance for the bottle material; not brand-stated as refillable.

Frequently Asked Questions

Is 10% niacinamide too strong for beginners? It can be, especially combined with this serum's citrus-fragrance allergens β€” beginners should patch test and consider starting with the brand's gentler ~5% mask format or a 2% alternative first.

Is this serum fragrance-free? No β€” Limonene and Linalool are both confirmed EU-26 fragrance allergens present, sourced from the citrus essential-oil fraction rather than added synthetic fragrance.

Can I use this on active breakouts? Anecdotal community feedback suggests caution β€” some reviewers avoid applying it directly onto active, inflamed lesions due to the citrus peel oil content; apply around active spots instead.

How is this different from the older "30 Days Blemish Care Serum"? This "Anti-Blemish Serum" carries roughly double the niacinamide (10% vs. 5%), making it a genuinely stronger, newer formula, not just a rebrand.

How long until I see results? Most community feedback points to noticeable changes around week 4, consistent with one epidermal turnover cycle.

Glossary
Niacinamide
A form of Vitamin B3 that slows pigment transfer to the skin's surface, evening tone over time.
PIH
Post-Inflammatory Hyperpigmentation β€” brown/tan flat marks left after a blemish heals.
PIE
Post-Inflammatory Erythema β€” red/pink flat marks from capillary damage, not treated by niacinamide.
Fairy Dusting
When a marketed "hero" ingredient sits at a trace, likely sub-effective concentration.
FA-Conditional
An ingredient some fungal-acne-safety trackers flag as a possible Malassezia trigger, with mixed evidence.
EU-26 Allergen
One of 26 fragrance ingredients the EU requires be declared by name for documented allergy potential.
Estimated 1% Line
The approximate point below which each listed ingredient is present at under 1% concentration.
MFDS
Korea's Ministry of Food and Drug Safety, which classifies cosmetics as "Functional" only after additional government testing.
The Adilsons Promise

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.

Delivery and Returns β€” Mauritius

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.

The Final Verdict

Best for: someone with genuine, stubborn post-blemish dark marks who wants a real 10% niacinamide dose and tolerates citrus fragrance well.

Key benefits: a documented, verified upgrade from the brand's older 5% formula; genuinely high yuja extract base; fast-absorbing with no reported pilling; a real graduation ladder within the line if it's too strong.

Keep in mind: two confirmed EU-26 fragrance allergens (Limonene, Linalool); the full INCI is not completely captured in available research; start slowly if you're new to niacinamide or citrus-reactive.

Compare products

{"one"=>"Select 2 or 3 items to compare", "other"=>"{{ count }} of 3 items selected"}

Select first item to compare

Select second item to compare

Select third item to compare

Compare