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Numbuzin No.5 Vitamin-Niacinamide Concentrated Serum scores 7.9/9.8 overall. It ranks highest in low irritation risk (9.5) and formulation safety (9.0).
Vitamin B3 that brightens and strengthens skin barrier
One of the most effective humectants
Lightweight humectant and solvent
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Estimated — based on ingredient analysis. Scores refine as user reviews are added.
Scores last verified: April 2026
Numbuzin No.5 Vitamin-Niacinamide Concentrated Serum is a solid serum with an overall score of 7.9/9.8. 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).
Great for
Works on your skin — #2 in the INCI list
Draws in moisture — #3 in the INCI list
Draws in moisture — #4 in the INCI list
Works on your skin — #6 in the INCI list
Works on your skin — #7 in the INCI list
TikTok 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 reviews16 ingredients — listed in INCI order (highest concentration first)
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© 2026 Gracie. All rights reserved. Data sourced from Open Beauty Facts (ODbL) and EU CosIng.