1st on the list, which puts it at an estimated 30–80% of the formula.
Aqua (EU),Deionized Water,Distilled Water,Micromatrix Fractile AN,Onsen-Sui (JPN),Purified Water
Numbuzin
No.5+ Glutathione Vitamin Concentrated Serum
face serum
Numbuzin
face serum
Added Last edited
Fit by skin type
General, ingredient-based — not your personalized match.
See how this fits your skin
Take the skin test and I'll show you how suitable this product is for you.
Take the skin testDaily serum enriched with tone-evening ingredients, glutathione and vitamin C, and antioxidants, to gently yet effectively fade dark spots and hyperpigmentation, leaving you with glowing, clear skin.
No.5+ Glutathione Vitamin Concentrated Serum is a lightweight serum from Numbuzin, a brand based in Korean. The formula is built mainly around hydration, soothing and brightening and tone. The ingredient list runs to 47 ingredients, each broken down in full below.
By its ingredient list the formula reads as light: water and humectants lead, with emollients kept lower in the order. Hydration is handled by Butylene Glycol, Panthenol and Glycerin, humectants that pull water into the upper layers of skin rather than sealing it there.
Hydration: High. Ingredients that pull and hold water in the upper layers of skin, and here that comes from Butylene Glycol, Panthenol, Glycerin and Ethylhexylglycerin.
Soothing: High. Ingredients aimed at visible redness and reactivity, and here that comes from Panthenol, Bisabolol, Allantoin and Beta-glucan.
Brightening: High. Ingredients that act on uneven tone and post-inflammatory marks, and here that comes from Niacinamide, Tranexamic Acid, 3-o-ethyl Ascorbic Acid and Alpha-arbutin.
Barrier support: High. Lipids and repair signals that support skin barrier integrity, and here that comes from Niacinamide, Panthenol, Butyrospermum Parkii Butter and Hydrogenated Lecithin.
On richness alone it suits Balanced, Combination (oily) and Oily skin best, and is the least natural fit for Dry and Combination (dry) skin. Nothing in the list is flagged as a common irritant, which is a reasonable starting point for reactive skin — though a patch test is still the only way to know.
The formula contributes little or nothing on cell renewal and firmness signalling. That is not a fault — most products are not meant to do everything — but if one of those is your priority, this is not the product that will address it.
Reading the full list, the formula is fragrance-free, essential-oil-free, no drying alcohol, paraben-free, silicone-free and microplastic-free. Those claims come from the ingredient list itself, not from the packaging.
It can be used morning and evening. In a routine it goes after toner, before moisturiser. Apply to clean, dry skin and give it a minute to absorb before the next layer. Introduce one new treatment at a time so you can identify what is working.
This summary is generated from the product's ingredient list. It is not a review, it is not the brand's own marketing claims, and it does not replace advice from a dermatologist.
Drawn purely from the ingredient list
Scored on how rich or light the formula reads from its INCI order.
No ingredient in this formula carries a common-irritant flag, making it a reasonable option for reactive skin. A patch test is still recommended, as individual skin reactivity varies.
Based on the curated benefits documented for this product's ingredients.
Boosts collagen and cell turnover to reduce fine lines and wrinkles
Attracts and locks in moisture to keep skin plump and dewy
Calms redness, irritation, and inflammation for sensitive skin
Fades hyperpigmentation and evens out dark spots over time
Brightens and balances complexion for a more uniform appearance
Tightens and refines the look of enlarged pores
None of the ingredients in this formula are associated with these benefits. This is not unusual, as most products are designed to target a limited number of concerns.
The actives, UV filters and benefit-carrying ingredients in this formula, in the order they are listed.
1st on the list, which puts it at an estimated 30–80% of the formula.
Aqua (EU),Deionized Water,Distilled Water,Micromatrix Fractile AN,Onsen-Sui (JPN),Purified Water
2nd on the list, which puts it at an estimated 5–20% of the formula.
Butane-1,3-diol (CAS No. 107-88-0/ EC No. 203-529-7) (R)-(-)-butane-1,3-diol” (CAS No. 6290-03-5/ EC No. 228-532-0)
3rd on the list, which puts it at an estimated 5–20% of the formula.
Niacinamide (vitamin B3) is a gentle skincare active that repairs the skin barrier, calms redness, controls oil and evens tone at 2–5%. Official IUPAC name: **3-Pyridinecarboxamide**
4th on the list, which puts it at an estimated 2–10% of the formula.
Butanamide, 2,4-dihydroxy-N-(3-hydroxypropyl)-3,3-dimethyl-, (2R)-; dl-Panthenol
5th on the list, which puts it at an estimated 2–10% of the formula.
Cyclohexanecarboxylic acid, 4-(aminomethyl)-, trans-
8th on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
Decanoic acid, ester with 1,2,3-propanetriol octanoate; Glycerides, mixed decanoyl and octanoyl
9th on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
D-Glucitol
10th on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
Vaccinium Vitis-Idaea Fruit Extract is an extract of the fruit of the Cowberry, Vaccinium vitis-idaea L., Ericaceae
11th on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
Docosan-1-ol
12th on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
1,2-Dihydroxypentane
13th on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
Glycerine ;Glycerol (INN); Glycerol (RIFM); Glycerolum (EP); Glycyl Alcohol; 1,2,3-Propanetriol; 1,2,3-Trihydroxypropane
15th on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
Butyrospermum Parkii Butter is the fat obtained from the fruit of the Shea Tree, Butyrospernum parkii, Sapotaceae
Each axis is scored from the ingredients present and how high up the list they sit.
Ingredients that pull and hold water in the upper layers of skin
Lipids and repair signals that support skin barrier integrity
Ingredients that mop up free radicals from UV and pollution
Ingredients that moderate sebum or absorb shine
Ingredients that act on uneven tone and post-inflammatory marks
Ingredients aimed at visible redness and reactivity
Retinoids, acids and enzymes that speed surface turnover
Peptides and growth factors that signal for collagen support
"Active" here means an ingredient carrying a recorded active type or a recognised UV filter.
Solvents, emollients, texture agents and preservatives — the formula that carries the actives.
Read from the full ingredient list. A brand's own claim may differ.
Judged by the same curated rules our routine checker uses. It reads the ingredients, not the label.
Best kept to separate routines — one in the morning, one at night, or on alternate days.
Can be layered, but the combination raises the irritation risk. Go slowly.
Can be layered, but the combination raises the irritation risk. Go slowly.
Can be layered, but the combination raises the irritation risk. Go slowly.
This product is the "Treat" step.
Flags to check, not verdicts. None of this is medical advice — if you are pregnant, breastfeeding or treating a skin condition, ask a doctor.
Most ingredients do more than one job, so these counts add up to more than the 47 ingredients on the label.
Botanical material, usually for antioxidants or scent
Neutralises free radicals from UV and pollution
Sets the thickness, spread and stability of the formula
Changes how skin behaves rather than how it feels
Draws water into the upper layers of skin
Dissolves and carries everything else
Sets the acidity the formula needs to work
Calms visible redness and irritation
Softens and smooths by filling gaps between skin cells
Forms a film that slows water loss
Lifts oil and dirt, or holds oil and water together
Binds trace metals that would otherwise spoil the formula
Every ingredient on the label, in order, with what it does and roughly how much of it is likely to be there.
1st on the list, which puts it at an estimated 30–80% of the formula.
Aqua (EU),Deionized Water,Distilled Water,Micromatrix Fractile AN,Onsen-Sui (JPN),Purified Water
2nd on the list, which puts it at an estimated 5–20% of the formula.
Butane-1,3-diol (CAS No. 107-88-0/ EC No. 203-529-7) (R)-(-)-butane-1,3-diol” (CAS No. 6290-03-5/ EC No. 228-532-0)
3rd on the list, which puts it at an estimated 5–20% of the formula.
Niacinamide (vitamin B3) is a gentle skincare active that repairs the skin barrier, calms redness, controls oil and evens tone at 2–5%. Official IUPAC name: **3-Pyridinecarboxamide**
4th on the list, which puts it at an estimated 2–10% of the formula.
Butanamide, 2,4-dihydroxy-N-(3-hydroxypropyl)-3,3-dimethyl-, (2R)-; dl-Panthenol
5th on the list, which puts it at an estimated 2–10% of the formula.
Cyclohexanecarboxylic acid, 4-(aminomethyl)-, trans-
6th on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
7th on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
2,2-Dimethyl-1,3-propanediyl didecanoate
8th on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
Decanoic acid, ester with 1,2,3-propanetriol octanoate; Glycerides, mixed decanoyl and octanoyl
9th on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
D-Glucitol
10th on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
Vaccinium Vitis-Idaea Fruit Extract is an extract of the fruit of the Cowberry, Vaccinium vitis-idaea L., Ericaceae
11th on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
Docosan-1-ol
12th on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
1,2-Dihydroxypentane
13th on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
Glycerine ;Glycerol (INN); Glycerol (RIFM); Glycerolum (EP); Glycyl Alcohol; 1,2,3-Propanetriol; 1,2,3-Trihydroxypropane
14th on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
Chondrus Crispus Extract is an extract of the carrageenan, Chondrus crispus, Gigartinaceae
15th on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
Butyrospermum Parkii Butter is the fat obtained from the fruit of the Shea Tree, Butyrospernum parkii, Sapotaceae
16th on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
3-O-Ethyl Ascorbic Acid is the organic compound.
17th on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
Saccharum Officinarum Extract is an extract of the sugar cane, Saccharum officinarum L., Poaceae
18th on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
2-Propenoic acid, polymer with 2,2-bis(hydroxymethyl)propane-1,3-diol 2-propenyl ether
19th on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
4-Hydroxyphenyl-alpha-D-glucopyranoside
20th on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
(R*,R*)-.alpha.,4-dimethyl-.alpha.-(4-methyl-3-pentenyl)cyclohex-3-ene-1-methanol; 3-Cyclohexene-1-methanol, alpha,4-dimethyl-alpha-(4-methyl-3-pentenyl)-, (theta,theta)-(+/-)-; 3-Cyclohexene-1-methanol, alpha,4-dimethyl-alpha-(4-methyl-3-pentenyl)-, (S-(theta,theta))- (levomenol)
21st on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
1,3-Propanediol, 2-amino-2-(hydroxymethyl)-
22nd on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
1,2-Propanediol, 3-(2-ethylhexyloxy)
23rd on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
Bifida Ferment Lysate is a lysate of the product obtained by the fermentation of Bifida
24th on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
6-Amino-9-beta-D-ribofuranosyl-9H-purine
25th on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
Lecithins, hydrogenated
26th on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
Urea, (2,5-dioxo-4-imidazolidinyl)-
27th on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
Hyaluronic acid, sodium, salt
28th on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
Xanthan gum
29th on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
Glycine, N-(N-L-.gamma.-glutamyl-L-cysteinyl)-
30th on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
Disodium dihydrogen ethylenediaminetetraacetate
31st on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
Melia Azadirachta Flower Extract is an extract of the flowers of the Neem Tree, Melia Azadirachta L., Meliaceae
32nd on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
Ocimum Sanctum Leaf Extract is an extract of the leaves of Ocimum sanctum, Labiatae
33rd on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
Melia Azadirachta Leaf Extract is an extract of the leaves of the Neem Tree, Melia azadirachta L., Meliaceae
34th on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
Ceramide NP,1,3,4-Octadecanetriol, 2-Octadecanamide,Stearoyl-C18-Phytosphingosine,Stearoyl-4-Hydroxysphinganine
35th on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
Curcuma Longa Root Extract is an extract of the rhizomes of the Turmeric, Curcuma longa L., Zingiberaceae
36th on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
Corallina Officinalis Extract is an extract of the Alga, Corallina officinalis L., Corallinaceae
37th on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
beta-Glucan is a polysaccharide consisting of b(1-3) linked glucose chains carrying b(1-6) linked glucose sidechains
38th on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
.alpha.-d-Glucopyranosiduronic acid, (3.beta.,20.beta.)-20-carboxy-11-oxo-30-norolean-12-en-3-yl 2-O-.beta.-d-glucopyranuronosyl-, dipotassium salt
39th on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
3,4-Dihydro-2,5,7,8-tetramethyl-2-(4,8,12-trimethyltridecyl)-2H-benzopyran-6-ol; .alpha.-tocopherol; Vitamin E
40th on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
Ascorbic acid
41st on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
2-O-alpha-D-Glucopyranosyl-L-ascorbic acid
42nd on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
3,4-Dihydro-2,5,7,8-tetramethyl-2-(4,8,12-trimethyltridecyl)-2H-benzopyran-6-yl acetate
43rd on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
.beta.-Cyclodextrin, 2-hydroxypropyl ethers
44th on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
2,5-Cyclohexadiene-1,4-dione, 2-(3,7,11,15,19,23,27,31,35,39-decamethyl-2,6,10,14,18,22,26,30,34,38-tetracontadecaenyl)-5,6-dimethoxy-3-methyl-, (all-E)-
45th on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
1,2-Dithiolane-3-pentanoic acid, (+/-)-
46th on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
Tremella Fuciformis (Mushroom) Extract is an extract of the Mushroom, Tremella Fuciformis
47th on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
Potassium hydroxide
Products in the same category that share this formula's distinguishing ingredients.
Numbuzin
Shares 17 key ingredients with No.5+ Glutathione Vitamin Concentrated Serum: Water, Butylene Glycol, Niacinamide, Panthenol, Tranexamic Acid
Eqqualberry
Shares 12 key ingredients with No.5+ Glutathione Vitamin Concentrated Serum: Water, Butylene Glycol, Glycerin, Niacinamide, Ceramide NP
Arencia
Shares 11 key ingredients with No.5+ Glutathione Vitamin Concentrated Serum: Water, Butylene Glycol, Glycerin, Niacinamide, Sodium Hyaluronate
Abib
Shares 11 key ingredients with No.5+ Glutathione Vitamin Concentrated Serum: Water, Butylene Glycol, Glycerin, Caprylic/capric Triglyceride, Niacinamide
Anua
Shares 11 key ingredients with No.5+ Glutathione Vitamin Concentrated Serum: Water, Glycerin, Niacinamide, Tranexamic Acid, Butylene Glycol
Dr.Althea
Shares 11 key ingredients with No.5+ Glutathione Vitamin Concentrated Serum: Niacinamide, Butylene Glycol, Water, Tranexamic Acid, Glycerin
WATER, BUTYLENE GLYCOL, NIACINAMIDE, PANTHENOL, TRANEXAMIC ACID, 1,2-HEXANEDIOL, NEOPENTYL GLYCOL DICAPRATE, CAPRYLIC/CAPRIC TRIGLYCERIDE, SORBITOL, VACCINIUM VITIS-IDAEA FRUIT EXTRACT, BEHENYL ALCOHOL, PENTYLENE GLYCOL, GLYCERIN, CHONDRUS CRISPUS EXTRACT, BUTYROSPERMUM PARKII BUTTER, 3-O-ETHYL ASCORBIC ACID, SACCHARUM OFFICINARUM EXTRACT, CARBOMER, ALPHA-ARBUTIN, BISABOLOL, TROMETHAMINE, ETHYLHEXYLGLYCERIN, BIFIDA FERMENT LYSATE, ADENOSINE, HYDROGENATED LECITHIN, ALLANTOIN, SODIUM HYALURONATE, XANTHAN GUM, GLUTATHIONE, DISODIUM EDTA, MELIA AZADIRACHTA FLOWER EXTRACT, OCIMUM SANCTUM LEAF EXTRACT, MELIA AZADIRACHTA LEAF EXTRACT, CERAMIDE NP, CURCUMA LONGA ROOT EXTRACT, CORALLINA OFFICINALIS EXTRACT, BETA-GLUCAN, DIPOTASSIUM GLYCYRRHIZATE, TOCOPHEROL, ASCORBIC ACID, ASCORBYL GLUCOSIDE, TOCOPHERYL ACETATE, HYDROXYPROPYL CYCLODEXTRIN, UBIQUINONE, THIOCTIC ACID, TREMELLA FUCIFORMIS EXTRACT, POTASSIUM HYDROXIDE.
NIACINAMIDE, PANTHENOL, 3-O-ETHYL ASCORBIC ACID, SODIUM HYALURONATE, CERAMIDE NP, ASCORBIC ACID, ASCORBYL GLUCOSIDE.
Apply it after toner, before moisturiser. Apply to clean, dry skin and give it a minute to absorb before the next layer. Introduce one new treatment at a time so you can identify what is working.
Judged on how rich the formula reads from its ingredient list, it suits Balanced, Combination (oily), Oily skin best. It is the least natural fit for Dry, Combination (dry) skin.
No ingredient in this formula carries a common-irritant flag, making it a reasonable option for reactive skin. A patch test is still recommended, as individual skin reactivity varies.
2 ingredients could feed malassezia: Butyrospermum Parkii Butter, Bifida Ferment Lysate. That describes the yeast's food supply, not a prediction that they will cause a breakout.
It contains Alpha-arbutin, which are usually reviewed with a doctor during pregnancy. Ask your doctor or midwife before using it.
Yes. Reading the full ingredient list, this formula is fragrance-free.
No. Reading the full ingredient list, this formula is no drying alcohol.
Yes. Reading the full ingredient list, this formula is silicone-free.
No. Reading the full ingredient list, this formula is essential-oil-free.
Yes. Reading the full ingredient list, this formula is paraben-free.
It layers well with Vitamin C (L-ascorbic acid), PHAs (gluconolactone), Azelaic acid, Copper peptides, Bakuchiol, Niacinamide. Take more care combining it with Benzoyl peroxide, Retinoids (retinol, retinal), AHAs (glycolic, lactic), BHA (salicylic acid) — use them in separate routines or on alternate days.
Use it morning and evening, after toner, before moisturiser.
It lists 47 ingredients, of which 7 are recorded as actives.
Numbuzin, a brand based in Korean.
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