numbuzin No.5 Vitamin Concentrated Serum 1.01 fl oz — Tranexamic Acid 4% & Niacinamide 5% for Even, Radiant Skin

numbuzin No.5 Vitamin Concentrated Serum is a daily Korean-style treatment that combines tranexamic acid 4%, niacinamide 5%, glutathione and vitamins to help even skin tone and promote a fresh, radiant-looking finish.

This lightweight, alcohol- and oil-free serum is formulated to sit comfortably in morning and evening routines. The single-bottle approach brings several commonly sought-after actives together—tranexamic acid, niacinamide, glutathione, vitamin C, panthenol and ceramides—so you get a streamlined step that layers easily with sunscreens and moisturizers.

How does this serum fit into a daily skincare routine?

Use the serum after cleansing and toning, before heavier creams or sunscreen. Its fluid, fast-absorbing texture allows for simple layering without pilling, whether you follow a minimalist or multi-step regimen.

• Apply 2–3 drops to clean skin, gently patting until absorbed.
• Follow with moisturizer and SPF in the morning.
• Pair with retinoids at night by applying retinoid after the serum or alternating nights if sensitivity occurs.

What key ingredients are in numbuzin No.5 and what do they do?

The formula combines targeted actives for tone, brightness and barrier support in one bottle. Tranexamic acid and niacinamide address uneven pigmentation, while glutathione and vitamin C contribute antioxidant support; panthenol and ceramides help maintain hydration and comfort.

• Tranexamic Acid 4% — supports a more even-looking complexion.
• Niacinamide 5% — helps visibly refine skin texture and tone.
• Glutathione & Vitamin C — provide antioxidant support and brightness.
• Panthenol & Ceramides — reinforce skin’s moisture barrier and comfort.

Is the texture and formula suitable for my skin type?

The serum is designed to be lightweight, non-greasy and free of alcohol and oils, which makes it broadly suited to dry, oily, combination and sensitive skin. Its quick-absorbing feel works well under makeup and sunscreen without leaving residue.

• Fluid texture absorbs quickly for comfortable daytime wear.
• Alcohol-free and oil-free for a breathable finish.
• Works as a spot treatment or whole-face serum depending on preference.

How should I introduce this serum if I have sensitive skin?

If you’re sensitive, start by applying the serum every other day or use small amounts on targeted areas. Patch testing on the inner forearm or behind the ear for 48 hours can help you assess tolerance before full-face use.

• Begin with a patch test for two days to check for reactions.
• Use every other night or alternate with other actives if irritation occurs.
• Reduce frequency and consult a dermatologist if persistent irritation appears.

Who is this for? numbuzin No.5 Vitamin Concentrated Serum is aimed at people looking to simplify their regimen while addressing uneven tone, dullness and barrier comfort. It’s appropriate for those who prefer a single, multi-active step that layers well under sunscreen and moisturizers, including users with dry, oily, combination or sensitive skin who want a lightweight, fast-absorbing option.

Ingredients

Water, Butylene Glycol, Niacinamide, Panthenol, Tranexamic Acid, 1,2-Hexanediol, Neopentyl Glycol Dicaprate, Caprylic/Capric Triglyceride, Sorbitol, Vaccinium Vitis-Idaea Fruit Extract, Chondrus Crispus Extract, Butyrospermum Parkii (Shea) Butter, Saccharum Officinarum (Sugarcane) Extract, Alpha-Arbutin, Bifida Ferment Lysate, Sodium Hyaluronate, Melia Azadirachta Flower Extract, Ocimum Sanctum Leaf Extract, Melia Azadirachta Leaf Extract, Curcuma Longa (Turmeric) Root Extract, Corallina Officinalis Extract, Tremella Fuciformis (Mushroom) Extract, Pentylene Glycol, Glycerin, 3-0-Ethyl Ascorbic Acid, Bisabolol, Tromethamine, Ethylhexylglycerin, Adenosine, Hydrogenated Lecithin, Allantoin, Glutathione, Ceramide Np, Beta-Glucan, Dipotassium Glycyrrhizate, Tocopherol, Ascorbic Acid, Ascorbyl Glucoside, Tocopheryl Acetate, Hydroxypropyl Cyclodextrin, Ubiquinone, Thioctic Acid, Potassium Hydroxide, Behenyl Alcohol, Carbomer, Xanthan Gum, Disodium EDTA.