numbuzin No.5 Glutathione C Mark Ampoule

What is this product?

Choose this numbuzin ampoule for what its label prints rather than for what its name says. The statutory ingredient list discloses niacinamide at 50,000 ppm and tranexamic acid at 40,000 ppm, which is 5 and 4 percent, alongside panthenol at 5 percent, alpha-arbutin and bisabolol, making it a well-dosed and unusually transparent post-acne-mark and uneven-tone serum. Skip it if glutathione or vitamin C is the reason for buying: the same label prints glutathione at 100 ppm and both plain ascorbate forms at 1 ppb, garnish levels well behind the actives that carry the formula. The Olive Young record and the brand page agree that a functional cosmetic review or report was completed, but neither names which function, so no registered efficacy is assigned here. Reactive skin should patch test, since 5 percent niacinamide plus three ascorbate forms is a busy load. Container form and pH are undisclosed.

What makes it different?

Inline ppm disclosure for seven separate actives in the statutory list, which is rare in this category, and which makes the product name's own emphasis checkably inverted against the doses printed beside it.

What is in it?

The full ingredient list as the brand publishes it, in the printed order. Each name links to what we know about that ingredient.

This brand publishes its ingredient list in Korean only. Names below are the matching INCI names from the Korean Cosmetic Association ingredient dictionary.

Key ingredient

• 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-O-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

Ingredients with no mark are ones we found nothing notable about, and when marks overlap on one ingredient we show the caution first.

We could not place these in the list above: Butyrospermum Parkii (Shea) Butter, Hydrogenated Lecithin

Did the ad claims hold up?

We checked 6 lines this product advertises against the ingredient list and public documents. 2 of them hold up. The rest are only partly right or have nothing behind them.

Claims translated from Korean, originals preserved.

Each line is quoted as the brand published it, and each one was read on its own against the ingredient list and the documents the brand publishes.

How we read these lines

What else is worth seeing?

Products we read alongside this one.

• numbuzin No.5 Glutathione C Vitamin Boosting Essential TonerThe gentler one of the two
• numbuzin No.1 Pantothenic B5 Active Soothing SerumAnother product in the same category

Which articles cover it?

Articles on this site that write about this product.

• Glutathione and tranexamic acid: the brightener on the box is rarely the big numberTranexamic acid gets a printed figure on six Korean labels, glutathione on eight. Arbutin, the one the regulator actually notified, gets one on none.