FREQUENTLY ASKED QUESTIONS
Is Numbuzin No.5+ serum suitable for sensitive or acne-prone skin?
Does it oxidize like other vitamin C serums?
Should I keep this serum in the fridge?

Reduces pigmentation and brightens the skin

Key Ingredients
Even Skin Tone + Glowy Skin + Brightening
Reveal your brightest, most radiant skin yet with the numbuzin No.5+ Vitamin Concentrated Serum, a powerhouse K-beauty skincare serum formulated to fade dark spots, improve skin texture, and deliver a lit-from-within glow. Packed with 5% Niacinamide, 4% Tranexamic Acid, Glutathione, Vitamin C, and alpha-arbutin, this brightening serum targets uneven skin tone, hyperpigmentation, acne scars, and dullness — all while being gentle on sensitive skin. Perfect for those looking for vitamin C serum for dark spots or a niacinamide serum that brightens and hydrates, this serum delivers visible results in as little as 2-4 weeks.
✨ Why You’ll Love It:
Skin Types — All Skin Types, including Acne-prone, Sensitive
Key Ingredients — Glutathione, Vitamin C, Niacinamide, Tranexamic Acid, Ceramides
Benefits — Brightens, Fades dark spots, Hydrates, Improves radiance & skin vitality
Formula Highlights — Cruelty-free, Artificial fragrance-free, Alcohol-free, Silicon-free
Tags: 50%off, Acne, Ampoules, Best, Brightening, Ceramides, Dullness, Essences & serums, K-beauty, Niacinamide, Numbuzin, Tranexamic acid, Txa, Vitamin c
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Is Numbuzin No.5+ serum suitable for sensitive or acne-prone skin?
Yes. The serum is alcohol-free, fragrance-free, silicone-free, and fungal-acne safe. It’s gentle enough for sensitive and blemish-prone skin, with ingredients like panthenol and ceramide NP soothing inflammation while ceramides and glycerin support the skin barrier.
Does it oxidize like other vitamin C serums?
No — Numbuzin uses a stable derivative of vitamin C, so it’s less prone to oxidation compared to traditional L-ascorbic acid serums. Keep the bottle away from direct sunlight and store it in a cool, dry place to preserve freshness.
Should I keep this serum in the fridge?
It is not required, but storing it in a cool, dark place (or fridge) can help keep the vitamins fresh and provide a soothing application experience.
Soothes skin and suppress melanin synthesis
• Glutathione
Helps with anti-aging network and brightening.
• Vaccinium Vitis-Idaea Fruit Extract (604,074ppm)
Brightens and skin complexion.
Feel free to contact us if you have any questions or concerns