NUMBUZIN No.5 Vitamin Concentrated Serum – a serum for uneven skin tone and the appearance of dark spots
NUMBUZIN No.5 Vitamin Concentrated Serum is a facial serum designed to care for dull, uneven-looking skin, particularly when post-breakout marks or darker areas are a concern. Its concept is not built around a single standout active ingredient, but rather a combination of several ingredients that help support a more even-looking complexion, complemented by components chosen for skin comfort. It is a targeted product from the No.5 line, pairing a brightening formula with an experience that is not associated with the harsh, acidic feel of some vitamin C serums.
More than just vitamin C: a multi-targeted tone-correcting formula
The core of this serum’s formula is niacinamide, tranexamic acid, glutathione, and several forms of vitamin C. The vitamin C derivatives are not the only focus here; they are part of a broader system designed to support the appearance of brighter, more even-toned skin. One of the formula’s most notable features is that, alongside 3-O-Ethyl Ascorbic Acid, it also contains Ascorbic Acid and Ascorbyl Glucoside, giving the product a more comprehensive approach than one based on a single form of vitamin C.
- Niacinamide and Tranexamic Acid: the formula’s key pairing, helping promote a more even-looking skin tone and reduce the appearance of dark spots.
- Glutathione and vitamin C forms: a combination that reinforces the formula’s antioxidant focus and is intended for the appearance of tired, lackluster skin.
- Panthenol, Ceramide NP, and Beta-Glucan: ingredients that help maintain a moisturized feel and skin comfort when multiple active ingredients are combined in the formula.
- Alpha-Arbutin and Bifida Ferment Lysate: ingredients that complement the serum’s purpose while giving the formula more character than a vitamin C-only product.
The serum has a lightweight, slightly silky texture: it spreads quickly, absorbs without leaving a greasy layer, and leaves skin feeling hydrated with a subtly more radiant finish. On the skin, it feels more like a comfortable everyday serum than a watery, fast-evaporating concentrate, making it a natural fit between toner and moisturizer. It will appeal most to those looking for one product to care for uneven tone, dullness, and post-breakout marks, without wanting to rely on vitamin C alone.
Usage
After cleansing and toning the face, apply a few drops of NUMBUZIN No.5 Vitamin Concentrated Serum onto the face and gently massage until fully absorbed; use in the morning and/or evening before cream, avoiding direct contact with eyes, and for those with more sensitive skin, it is recommended to start by using every other day while observing the skin’s reaction.
Ingredients
Vaccinium Vitis-Idaea Fruit Extract, Butylene Glycol, Niacinamide, Panthenol, Tranexamic Acid, Water, 1-2-Hexanediol, Neopentyl Glycol Dicaprate, Caprylic/Capric Triglyceride, Sorbitol, Bifida Ferment Lysate, Chondrus Crispus Extract, Butyrospermum Parkii (Shea) Butter, Saccharum Officinarum (Sugarcane) Extract, Alpha-Arbutin, Sodium Hyaluronate, Melia Azadirachta Flower Extract, Ocimum Sanctum Leaf Extract, Melia Azadirachta Leaf Extract, Curcuma Longa (TurmericJRoot 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
The manufacturer is responsible for the product’s ingredients. Due to possible changes, we always recommend checking the ingredient list directly on the packaging.



Instead of lengthy descriptions, NUMBUZIN uses numbers from 1 to 9 (and beyond) to mark product lines designed to address specific skin issues—from uneven texture and dryness to pore care or restoring radiance. This approach allows informed and critical consumers to quickly identify and choose exactly what their skin needs, without getting lost in marketing noise. NUMBUZIN’s values are based on:
Trust NUMBUZIN’s approach to skincare—discover your number and let purposeful formulas take care of your skin’s needs. This brand inspires confidence with its clarity, concentrated compositions, and commitment to helping you achieve your desired skincare results without confusion. 




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