numbuzin No.5 Vitamin Concentrated Serum Dupes & Cheaper Alternatives
What Reddit recommends instead — 33 products with similar benefits · Analyzed 95 threads · Updated September 2, 2026
Cheaper options
Showing 6 of 15 · prices updated daily
For Hyperpigmentation
For Dehydration
For Redness / Irritation
For Acne
For Brightening
More alternatives

Dr. Althea
Vitamin C Boosting Serum4 shared traits·30 mentions
High 63% vitamin C concentration boosts brightening and scar fading

Glow Recipe
Watermelon Glow Niacinamide Dew Drops3 shared traits·21 mentions
Popular for its dewy finish and glow boost

Naturium
Vitamin C Complex Serum2 shared traits·21 mentions
10% vitamin C plus 5% derivative avoids low pH formulas

The Inkey List
15% Vitamin C And EGF Serum2 shared traits·14 mentions
Includes EGF to enhance skin brightness and repair

Some By Mi
AHA BHA PHA 30 Days Miracle Serum2 shared traits·7 mentions
Gentle but definite exfoliation with tri-acid blend

The Ordinary
Magnesium Ascorbyl Phosphate 10%2 shared traits·7 mentions
Gentler vitamin C derivative great for sensitive skin

Geek & Gorgeous
C-Glow1 shared trait·63 mentions
Strong 15% L-ascorbic acid formula for effective antioxidant and brightening support

Naturium
Tranexamic Topical Acid 5%1 shared trait·16 mentions
Potent 5% tranexamic acid plus kojic acid for targeted brightening
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