No.5 Vitamin Niacinamide Concentrated Serum
Concentrated niacinamide and vitamin C serum for brightening and even tone.
About this product
Numbuzin No.5 delivers a potent brightening duo of 5% niacinamide and stabilised vitamin C (ascorbyl glucoside) alongside 5% niacinamide in a concentrated serum that targets dullness, uneven skin tone, and hyperpigmentation. The lightweight, fast-absorbing formula is free from fragrance and alcohol, making it compatible with sensitive skin. Best used morning and evening for visible brightening results within 4 weeks.
Best for oily, combination, normal, dry, sensitive skin looking to address hyperpigmentation, dullness, uneven skin tone — with a focus on brightening.
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How to Use
- 1After cleansing and toning, dispense 2–3 pumps onto fingertips.
- 2Gently press into face and neck.
- 3Allow to absorb before moisturizer.
- 4Use morning and/or evening for best results.
Product Claims
Common Allergens
Based on confirmed product attributes. Always check the full ingredient list for personal allergens.
Always check the full ingredient list if you have known allergies or sensitivities.
Routine Placement
Apply this serum & ampoule as step 5 in your routine.
Quick Stats
Key Ingredients
Ingredient Analysis
Disclaimer: Ingredient information is for educational purposes only and does not constitute medical or dermatological advice. Sources: EWG Skin Deep, EU CosIng, NIH PubChem.
pH Level
Slightly acidic — close to skin's natural pH (4.5–5.5). Gentle and generally well tolerated.
Dermatologist Note
Combines niacinamide with a multi-vitamin complex (B3, B5, C). The synergy between niacinamide and vitamin C in this formula is carefully balanced — at the right concentrations and with buffering agents, the historically controversial combination can be used effectively for brightening without causing niacin flush.
Based on published clinical literature and dermatological research.
Ingredient Analysis
Disclaimer: Ingredient information is for educational purposes only and does not constitute medical or dermatological advice. Sources: EWG Skin Deep, EU CosIng, NIH PubChem.
Where to Buy
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Disclaimer: Information on this page is for educational purposes only and does not constitute medical or dermatological advice. Always patch test new products and consult a qualified professional if you have skin concerns. Skinuity does not sell any products. We provide affiliate links to third-party retailers and may earn a commission on qualifying purchases.