No.5 Vitamin-Niacinamide Concentrated Serum
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numbuzin No.5 Vitamin-Niacinamide Concentrated Serum scores 8.2/9.8 overall. It ranks highest in low irritation risk (9.5) and formulation safety (9.0).
✶ Hero ingredients
Vitamin B3 that brightens and strengthens skin barrier
One of the most effective humectants
Lightweight humectant and solvent
Score breakdown
Estimated — based on ingredient analysis. Scores refine as user reviews are added.
Scores last verified: July 2026
What makes numbuzin No.5 Vitamin-Niacinamide Concentrated Serum stand out
numbuzin No.5 Vitamin-Niacinamide Concentrated Serum is an excellent serum with an overall score of 8.2/9.8. Positioned in the mid-range bracket, it delivers a well-rounded formulation that balances efficacy with gentleness. The formula leads with Niacinamide, Glycerin, Butylene Glycol — ingredients that actively target skin concerns.
It performs well on low irritation risk (9.5) and active strength (7.3).
Is this right for you?
Great for
- ✓Sensitive skin — low irritation risk with a gentle formulation
- ✓Anyone wanting visible results — solid active ingredient lineup
- ✓Safety-conscious shoppers — clean formulation with minimal flags
Key ingredients
- ✶Niacinamide
Works on your skin — #2 in the INCI list
- ✶Glycerin
Draws in moisture — #3 in the INCI list
- ✶Butylene Glycol
Draws in moisture — #4 in the INCI list
- ✶Tranexamic Acid
Works on your skin — #6 in the INCI list
- ✶Glutathione
Works on your skin — #7 in the INCI list
What creators are saying
TikTokTikTok reviewers are raving about this serum's brightening and dark spot-fading abilities, with one user seeing significant improvement in acne scars and redness after just two weeks of use. They love that it has a lightweight, hydrating texture that absorbs quickly without stickiness, and appreciate that it's gentle enough for sensitive skin since it's free from alcohol, fragrance, and essential oils. Reviewers recommend it for anyone dealing with hyperpigmentation, dark spots, or acne scars who wants an effective yet gentle brightening serum for daily use.
Based on 3 creator reviewsFull ingredient list
16 ingredients — listed in INCI order (highest concentration first)
Compare with similar products
- Lancôme Renergie C.R.X. Triple Serum Retinol9.7
- INNBEAUTY PROJECT Pro C Serum Brightening Solution with 15% Vitamin C + Ferulic Acid9.7
- innisfree Vitamin C Brightening Serum-Infused Mask for Dark Spots9.7
- Skinfix barrier+ Triple Lipid Activating Serum With Plumping Peptides and Niacinamide9.6
- innisfree Gentle Retinol + Salicylic Acid Acne Serum for Blemishes + Post-Acne Scars9.6
Ingredient breakdown
- Works on your skin8
- Draws in moisture4
- Keeps the product fresh2
- Other ingredient1
- Holds the formula together1