Description
xTarget visible dark spots and uneven skin tone with numbuzin No.5 Vitamin Concentrated Serum. Formulated with 4% Tranexamic Acid, 5% Niacinamide, Glutathione, and Vitamin C, this concentrated Korean skincare serum helps improve the look of hyperpigmentation—suitable for sensitive skin.
The numbuzin No.5+ Glutathione Vitamin Concentrated Serum is a popular Korean skincare product focused on intensive brightening and evening out skin tone.1 It's primarily used to target hyperpigmentation, dark spots, sun spots, and post-acne marks, and to address dullness for a more radiant complexion.2
The "No.5" in the name indicates it belongs to the brand's line of products specifically formulated for hyperpigmentation care.
Key Ingredients and Their Functions:
The serum is packed with a complex of brightening and antioxidant ingredients:3
| Ingredient | Concentration (Approximate) | Function |
| Glutathione | High concentration for a topical product (e.g., 100ppm) | A powerful antioxidant known for its brightening properties and ability to even out skin tone by inhibiting melanin production. |
| Niacinamide (Vitamin B3) | 5% (50,000ppm) | A multi-functional ingredient that brightens, reduces hyperpigmentation, and helps minimize the appearance of pores. |
| Tranexamic Acid | 4% (40,000ppm) | A strong brightening agent that targets discoloration, including melasma and post-inflammatory hyperpigmentation (PIH/PIE). |
| Vitamin C Derivatives | Including 3-O-Ethyl Ascorbic Acid | Antioxidants that help to brighten the skin, improve collagen production, and protect against environmental damage. |
| Alpha-Arbutin | Varies | A well-known ingredient for fading dark spots and promoting a more even complexion. |
| Panthenol (Vitamin B5) | 5% (50,000ppm) | Provides soothing and hydrating effects, which helps reduce the potential for irritation from the potent brightening ingredients. |
| Antioxidant-Rich Extracts | High concentration of Vaccinium Vitis-Idaea (Lingonberry) Fruit Extract | Provides broad antioxidant benefits to protect the skin and enhance radiance. |
Key Benefits:
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Fades Hyperpigmentation: Targets various forms of dark spots, including sun spots, acne scars, and blemishes.4
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Brightens and Evens Skin Tone: Works to reduce dullness and create a clearer, more luminous complexion.5
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Antioxidant Protection: The blend of glutathione and vitamins helps build an antioxidant network to protect the skin.6
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Soothing: Contains ingredients like Panthenol to minimize potential irritation from the active brightening complex.7
Additional Information
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Shipping & Return
xReturns Policy
You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Shipping
We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.
When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.
Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.
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