numbuzin No.5 Glutathione Vitamin Concentrated Serum 30ml
- Authentic Korean skincare, sourced through our Korea-based supplier and shipped straight to you.
- Ships from Korea and usually arrives in 5 to 10 business days, with tracking emailed. Free US shipping on orders $45+; $7.95 under that.
- Damaged, leaking or wrong item? We'll replace it or refund you, no return needed. Our policy
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Dull, tired skin? Meet your new glow serum.
A Korean serum with niacinamide, vitamin C and tranexamic acid for every skin type.
Some weeks your skin just looks flat, no matter how much water you drink. The numbuzin No.5 serum packs 5% niacinamide and 5% panthenol with tranexamic acid, vitamin C derivatives and glutathione into a lightweight, layerable formula. Press in a few drops morning and night for a healthy, radiant-looking glow.
Learn more: Glutathione in Skincare, Explained: What It Is (and What It Isn't)
Scent: No added fragrance or essential oils in the ingredient list.
Key benefits & what's included
- A healthy, radiant-looking glow on dull days
- Hydrated, comfortable skin with 5% panthenol
- Smoother, more even-looking skin
- Lightweight and easy to layer morning and night
- An antioxidant-rich formula with glutathione
- What's included: One 30ml serum
Key ingredients
- Niacinamide (5%): helps skin look smoother and more radiant
- Panthenol (5%): helps keep skin hydrated and comfortable
- Glutathione: an antioxidant ingredient at the heart of the glow formula
- Tranexamic acid: helps skin look more even
How to use
Use AM and PM after toner. Press 2 to 3 drops into the skin and let it absorb before moisturizer.
Good to know
- Size: 30ml
- Best for: all skin types, especially dull or tired-looking skin
- Patch test before first use and wear daily SPF.
Still deciding?
Is 5% niacinamide too strong for me?
It's made for all skin types. Patch test before first use, and start once a day if you're new to niacinamide.
Do I need sunscreen with it?
Yes. Wear daily SPF to protect your glow.
How long will it take to arrive?
It ships from Korea with tracking, usually in 5–10 business days. US shipping is free on orders of $45 or more.
Product specs
| Brand | numbuzin |
|---|---|
| Size | 30ml |
| Format | Serum |
| Skin type | All skin types, especially dull or tired-looking skin |
| Key ingredients | Niacinamide 5%, panthenol 5%, tranexamic acid, glutathione, vitamin C derivatives |
| When to use | AM & PM; wear daily SPF |
| Routine step | Treat |
| Storage | Store at room temperature, away from direct sunlight. Close the cap after use. |
| Brand origin & ships from | South Korea · ships from Korea with tracking |
Full ingredient list
Water, Butylene Glycol, Niacinamide (50,000ppm), Panthenol (50,000ppm), Tranexamic Acid (40,000ppm), 1,2-Hexanediol, Neopentyl Glycol Dicaprate, Caprylic/Capric Triglyceride, Sorbitol, Bilberry Extract, Irish Moss Extract, Shea Butter, Sugarcane Extract, Alpha-Arbutin, Bifida Ferment Lysate, Sodium Hyaluronate, Melia Azadirachta Flower Extract, Holy Basil Leaf Extract, Melia Azadirachta Leaf Extract, Turmeric Root Extract, Corallina Officinalis Extract, Tremella Fuciformis Extract, Pentylene Glycol, Glycerin, 3-O-Ethyl Ascorbic Acid (2,000ppm), Bisabolol, Tromethamine, Ethylhexylglycerin, Adenosine, Hydrogenated Lecithin, Allantoin, Glutathione (100ppm), Ceramide NP, Beta-Glucan, Dipotassium Glycyrrhizate, Tocopherol, Ascorbic Acid (1ppb), Ascorbyl Glucoside (1ppb), Tocopheryl Acetate, Hydroxypropyl Cyclodextrin, Ubiquinone, Thioctic Acid, Potassium Hydroxide, Behenyl Alcohol, Carbomer, Xanthan Gum, Disodium EDTA.



