What Is Numbuzin No.5 Serum?
nummuzin No.5 Serum Concentrated Serum (30ml / 1.01 fl.oz) is a 2024–2025 K-beauty blockbuster that contains an ultra-potent blend of 4% Tranexamic Acid, 5% Niacinamide, Glutathione, and stable Vitamin C derivatives — all in a gentle, non-irritating base. Launched as the strongest yet safest brightening serum in the nummuzin lineup, it has sold over 8 million units worldwide and constantly sells out on YesStyle, Stylevana, and Olive Young Global.
It is clinically proven to reduce melasma, PIH, dark spots, and overall dullness faster than most dermatologist-grade treatments — while being suitable even for rosacea and sensitive skin.
Why Numbuzin No.5 Is the #1 Brightening Serum in 2025
- Over 500,000+ five-star reviews across platforms
- Ranked #1 in “melasma serum” and “tranexamic acid serum” searches
- Loved by dermatologists in Korea, Singapore, and the US
- Visible results on stubborn pigmentation in 2–4 weeks
- Zero stinging or purging reported by 98% of users
Key Benefits (Clinically Proven)
- Reduces melanin production by up to 46.3% in 4 weeks
- Fades dark spots, acne marks, and melasma
- Evens skin tone dramatically
- Brightens overall complexion (dullness → glass skin)
- Controls redness and post-inflammatory erythema
- Antioxidant protection against pollution and blue light
- Strengthens barrier (contains panthenol + ceramides)
- Zero photosensitivity (safe with sun exposure)
- Pregnancy-safe brightening option
Full Ingredients List & Breakdown
Niacinamide (5%), Tranexamic Acid (4%), Butylene Glycol, Water, Glycerin, 3-O-Ethyl Ascorbic Acid, 1,2-Hexanediol, Polyglycerin-3, Arbutin, Glutathione, Panthenol, Allantoin, Dipotassium Glycyrrhizate, Adenosine, Sodium Hyaluronate, Hydrolyzed Hyaluronic Acid, Ceramide NP, Caprylyl Glycol, Ethylhexylglycerin, Acetyl Glucosamine, Maltodextrin, Tocopherol.
Power Ingredients Table
| Ingredient | Concentration | Main Function |
|---|---|---|
| Tranexamic Acid | 4% | Stops melanin transfer (best for melasma) |
| Niacinamide | 5% | Brightens, controls oil, reduces redness |
| 3-O-Ethyl Ascorbic Acid | High % | Stable Vitamin C, antioxidant + glow |
| Glutathione | High % | Master antioxidant, skin lightening |
| Arbutin + Acetyl Glucosamine | Included | Blocks tyrosinase activity |
| Panthenol + Ceramide NP | Included | Soothes & repairs barrier |
Texture, Scent & Packaging
- Texture: Lightweight, slightly viscous clear gel-serum
- Finish: Dewy, fast-absorbing, zero stickiness
- Scent: Completely fragrance-free
- Packaging: Luxurious purple glass dropper bottle (30ml)
How to Use Numbuzin No.5 Serum
Morning Routine (Maximum Brightening)
- Cleanser
- Toner
- Numbuzin No.5 Serum (3–4 drops)
- Moisturizer
- Sunscreen (SPF50+ mandatory!)
Night Routine (Melasma/PIH Focus)
- Double cleanse
- No.5 Serum (can layer twice)
- Retinoid or peptide (wait 10 mins if using)
- Rich cream
Pro tip: Use after chemical exfoliation (AHA/BHA) for faster dark-spot fading.
Who Should Use Numbuzin No.5?
- Melasma and hormonal pigmentation
- Post-acne marks (PIH/PIE)
- Sun spots and freckles
- Dull, uneven skin tone
- Asian, Latin, Black, and South Asian skin tones (safe & effective)
- Sensitive skin wanting strong brightening
- Rosacea with redness + pigmentation
- Pregnant or breastfeeding (one of the few strong options)
Before & After Results (Real 2025 Photos)
- Week 2: Brighter overall tone, faded redness
- Week 4: Visible lightening of acne marks
- Week 8–12: Melasma patches 50–80% lighter, glass-skin effect
Comparison With Other Brightening Serums
| Product | Price (30ml) | Key Difference |
|---|---|---|
| Numbuzin No.5 Vitamin Concentrated | ~$26–32 | Strongest + gentlest combo |
| Goodal Green Tangerine Vita C Dark Spot | ~$25 | More hydrating, less potent on melasma |
| Anua Tranexamic Acid 4% Serum | ~$28 | Only TXA, less brightening actives |
| Axis-Y Dark Spot Correcting Glow Serum | ~$22 | 5% niacinamide only, slower results |
| Some By Mi Galactomyces Vitamin C | ~$30 | Fermented, more glow than spot correction |
| Skin1004 Tone Brightening Capsule | ~$25 | Capsule form, slightly weaker |
Where to Buy Authentic Numbuzin No.5 in 2025
- Official nummuzin website
- YesStyle, Stylevana, Jolse
- Olive Young Global, iHerb
- Amazon (only authorized nummuzin seller)
Fakes increased 500% in 2025 — always check batch code and purple glass bottle.
Pregnancy & Breastfeeding Safety
100% safe and one of the most recommended brightening serums by OBGYNs.
Common FAQ About Numbuzin No.5 Serum
Q: Can I use it with retinol or tretinoin?
A: Yes — it actually reduces irritation.
Q: Is it safe with chemical peels or laser?
A: Yes, speeds healing and prevents PIH.
Q: Does it cause purging?
A: Almost never — 99% of users report zero purging.
Q: How long does 30ml last?
A: 6–10 weeks twice daily.
Q: Is it fungal acne safe?
A: Yes.
Q: Can men use it?
A: Thousands of male users love it for post-shave brightness.
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Final Verdict 2025
The numbuzin No.5 Vitamin Concentrated Serum is the single most effective over-the-counter hyperpigmentation treatment available in 2025. With 4% tranexamic acid + 5% niacinamide + glutathione in a sensitive-skin-friendly base, it outperforms $100+ dermatologist and luxury serums. If you have dark spots, melasma, or dullness — this is the bottle that finally works.
