numbuzin No.5 Vitamin Concentrated Serum 30ml
numbuzin No.5 Vitamin Concentrated Serum 30ml
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About the Product
Size: 1.01 oz / 30ml
Product From: South Korea
What it is:
numbuzin No.5 Vitamin Concentrated Serum 30ml
numbuzin No.5 Vitamin Concentrated Serum is a powerhouse brightening serum packed with 50,000ppm Niacinamide and 121,900ppm Hippophae Rhamnoides (Sea Buckthorn) Water — one of nature’s richest sources of Vitamin C. Formulated with a full B-vitamin complex including Retinal, Riboflavin, Biotin, and Folic Acid, it targets dullness, uneven tone, and dark spots for a visibly brighter, more radiant complexion with consistent use.
Key Benefits
- 50,000ppm Niacinamide helps visibly brighten and even skin tone.
- 121,900ppm Sea Buckthorn Water delivers intense antioxidant and vitamin C benefits.
- Full B-vitamin complex (B1, B2, B3, B5, B6, B7, B9, B12) supports skin renewal and radiance.
- Retinal and Ascorbyl Glucoside help improve skin texture and reduce dark spots.
- Glutathione and Alpha-Arbutin further target hyperpigmentation for a luminous finish.
Key Ingredients
Niacinamide (50,000ppm): Helps brighten skin tone, reduce the appearance of dark spots, and support the skin barrier.
Hippophae Rhamnoides Water (121,900ppm): Sea Buckthorn Water rich in Vitamin C and antioxidants for intense brightening and skin protection.
Glutathione: A potent antioxidant that helps inhibit melanin production for a clearer complexion.
Retinal: A highly effective Vitamin A derivative that supports skin cell renewal and texture improvement.
Alpha-Arbutin & Tranexamic Acid: Help reduce the appearance of dark spots and hyperpigmentation.
Who It's For
- All skin types
- Dull, uneven, or hyperpigmented skin
- Skin with dark spots or post-acne marks
- Anyone seeking a high-potency vitamin brightening serum
How to Use
- After cleansing and toning, apply 2–3 drops to the face and neck.
- Gently press and pat until fully absorbed.
- Follow with moisturizer and SPF in the morning.
Recommended Use: Morning and evening. Always follow with SPF during the day.
Full Ingredients
Water, Glutathione, Niacinamide (50,000ppm), Hippophae Rhamnoides Water (121,900ppm), Methylpropanediol, Glycerin, Methyl Gluceth-20, Glycereth-26, 1,2-Hexanediol, Caprylic/Capric Triglyceride, Betaine, Ammonium Acryloyldimethyltaurate/VP Copolymer, Panthenol, Hydroxyacetophenone, Ethylhexylglycerin, Allantoin, Dipotassium Glycyrrhizate, Adenosine, Melia Azadirachta Flower Extract, Ocimum Sanctum Leaf Extract, Melia Azadirachta Leaf Extract, Curcuma Longa (Turmeric) Root Extract, Corallina Officinalis Extract, Tranexamic Acid, Ascorbyl Glucoside, Alpha-Arbutin, Bisabolol, Tocopherol, Sodium Ascorbyl Phosphate, Pyridoxine, Cyanocobalamin, Folic Acid, Biotin, Thiamine HCl, Riboflavin, Linoleic Acid, Retinal.
Disclaimer: This product is a cosmetic intended to improve the appearance of the skin. Individual results may vary. It is not intended to diagnose, treat, cure, or prevent any disease.

About the Brand
Shop numbuzin's skin-perfecting K-beauty serums and essences, designed to reveal your skin's best number.
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Questions & Answers
Frequently Asked Questions
What does 50,000ppm Niacinamide mean?
50,000ppm means 5% Niacinamide concentration — a clinically effective level for brightening, pore minimizing, and barrier support.
Can I use this with Vitamin C?
Yes. This serum contains stable Vitamin C derivatives (Ascorbyl Glucoside, Sodium Ascorbyl Phosphate) that are compatible with Niacinamide.
Does it contain Retinol?
It contains Retinal (Retinaldehyde), a more potent Vitamin A derivative than Retinol. Start with evening use and always follow with SPF the next morning.
Is it suitable for sensitive skin?
Due to the high-potency actives, we recommend patch testing before regular use if you have sensitive skin.
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