Product image of numbuzin No.5 Serum | Tranexamic Acid 4%, Niacinamide 5%, Glutathione, Vitamin C | Vitamin Concentrated Serum | Hyperpigmentation| Suitable for Sensitive Skin, Korean Skincare | 1.01 fl. oz.

numbuzin No.5 Serum | Tranexamic Acid 4%, Niacinamide 5%, Glutathione, Vitamin C | Vitamin Concentrated Serum | Hyperpigmentation| Suitable for Sensitive Skin, Korean Skincare | 1.01 fl. oz.

4.5(3,339 reviews)

AI-powered analysis of this product's reviews to help you make an informed purchase decision.

Trust Score Gauge showing C grade with 76% scoreCircular progress indicator displaying trust score from 0 to 100 percent, currently at 76 percent
C
0%
Good

Trust Score

How trustworthy are the reviews for this product?

✓ Reviews appear trustworthy

Analysis Summary

The numbuzin No.5 Serum has a strong overall score of 76/100, driven by high review content quality and velocity, indicating a positive reception from customers. However, the relatively low reviewer credibility score of 55/100 raises some concerns about the authenticity of the reviews. Despite this, the product's high product consistency score of 94/100 and the brand's decent seller reputation score of 70/100 suggest that the serum is a trustworthy option for addressing hyperpigmentation, particularly for those with sensitive skin.

Review Timeline

Review patterns over time - spikes may indicate manipulation

90%
Velocity Score
Spikes
0

None found

Peak
10

Reviews/mo

Timeline
4

Months

Pattern Analysis

Good: Review pattern appears natural with steady growth. No suspicious spikes that might indicate review manipulation.

Keyword Analysis

Common phrases and their authenticity patterns

85%
Authenticity
gentle on my skin(5)visible improvement(8)even tone(11)absorbs quickly(14)
Positive
4

Natural phrases

Critical
0

Genuine concerns

Suspicious
0

Generic phrases

Language Authenticity

Vocabulary Diversity97%
Natural Language Flow94%
Unique Phrasing95%

Good: Language patterns appear natural with good diversity. Reviews use varied vocabulary and authentic expressions.

Recommendation

✅ Recommended

Analysis Date

July 2, 2025

Total Reviews

3,339 reviews analyzed

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Grade Cnumbuzin No.5 Serum | Tranexamic Acid 4%, Niacinamide 5%, Glutathione, Vitamin C | Vitamin Concentrated Serum | Hyperpigmentation| Suitable for Sensitive Skin, Korean Skincare | 1.01 fl. oz.