No.5 Vitamin Concentrated Serum

Numbuzin

No.5 Vitamin Concentrated Serum

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About this product

The Numbuzin No.5 Vitamin Concentrated Serum is a emulsion. Our analysis of its 47 ingredients (37 low-risk) rates it Excellent (100/100). Based on its ingredients, it looks well-suited to oily / acne-prone, dry, and sensitive skin.

Vegan-friendly Reef-safe

Summarised from our ingredient analysis — not brand marketing copy.

At a glance

Type
Emulsion
Ingredients
47
Low-risk
37
Fragrance
Fragrance-free
Origin
South Korea

The evidence

Quick Product Notes

Paraben-Free Sulfate-Free Alcohol-Free Silicone-Free EU Allergen-Free Fungal Acne (Malassezia) Safe

Notable Effects & Ingredients

No Notable Effects & Ingredients

Ingredients Related to Skin Types

Good   Bad — tap a skin type to see which ingredients · estimated from ingredient functions
Dry Skin 8/4
Good for dry skin
Neopentyl Glycol Dicaprate Dipotassium Glycyrrhizate Behenyl Alcohol Sorbitol Caprylic/Capric Triglyceride Butylene Glycol Sodium Hyaluronate Glycerin
Caution for dry skin
Xanthan Gum Glycerin Hydrogenated Lecithin Tranexamic Acid
Oily/Acne-Prone Skin 1/0
Good for oily/acne-prone skin
Tranexamic Acid
Sensitive Skin 9/7
Good for sensitive skin
Ascorbyl Glucoside Alpha-Arbutin Vaccinium Vitis-Idaea Fruit Extract Ubiquinone Melia Azadirachta Leaf Extract Glycerin Thioctic Acid Tocopheryl Acetate Allantoin
Caution for sensitive skin
Glutathione Sorbitol Caprylic/Capric Triglyceride Butylene Glycol Glycerin Hydroxypropyl Cyclodextrin Tromethamine

Ingredients list

47 total
Lower hazard (1) Higher hazard (3)
All47 Skin Conditioning49 Fragrance9 Antioxidant8 Humectant8 Viscosity Controlling7 Emulsion Stabilising7 Solvent6 Skin Protecting4
EWG CIR Ingredient Name & Cosmetic Functions Notes
1
Vaccinium Vitis-Idaea Fruit Extract
(Antioxidant)
1
A
Butylene Glycol
(Fragrance, Skin Conditioning, Solvent, Viscositydecreasing Agent, Humectant, Masking, Viscosity Controlling)
Good for Dry Skin
Good for Dry Skin
1
A
Niacinamide
(Hair Conditioning, Skin Conditioning, Smoothing)
1
A
Panthenol
(Antistatic Agent, Hair Conditioning, Skin Conditioning)
Good for Dry Skin
Good for Dry Skin
Tranexamic Acid
(Cosmetic Astringent, Skin Conditioning)
1
Water
(Solvent)
1
A
1,2-Hexanediol
(Solvent)
1
Neopentyl Glycol Dicaprate
(Skin Conditioning, Emollient, Viscosity Increasing Agent)
1
A
Caprylic/Capric Triglyceride
(Emollient, Masking, Perfuming, Skin Conditioning, Solvent)
1
Sorbitol
(Flavoring Agent, Fragrance, Humectant, Plasticizer, Skin Conditioning)
1
Bifida Ferment Lysate
(Skin Conditioning)
Chondrus Crispus Extract
(Skin Conditioning, Viscosity Controlling)
Butyrospermum Parkii Butter
(Skin Conditioning, Viscosity Controlling)
Saccharum Officinarum Extract
(Moisturising, Skin Conditioning)
1
Alpha-Arbutin
(Antioxidant, Skin Conditioning)
1
A
Sodium Hyaluronate
(Skin Conditioning, Humectant)
Good for Dry Skin
Good for Dry Skin
1
Melia Azadirachta Flower Extract
(Skin Conditioning)
1
Ocimum Sanctum Leaf Extract
(Skin Conditioning)
1
Melia Azadirachta Leaf Extract
(Antimicrobial, Skin Protecting)
Curcuma Longa Root Extract
(Fragrance, Perfuming)
1
Corallina Officinalis Extract
(Skin Conditioning)
Tremella Fuciformis Extract
(Humectant, Skin Conditioning)
1
A
Pentylene Glycol
(Skin Conditioning, Solvent)
2
A
Glycerin
(Denaturant, Fragrance, Hair Conditioning, Humectant, Oral Care Agent, Oral Health Care Drug, Skin Protecting, Viscosity Decreasing Agent, Perfuming, Solvent)
Good for Dry Skin
Good for Dry Skin
Fungal Acne
Fungal Acne Trigger
3-O-ETHYL ASCORBIC ACID
(Skin Conditioning)
Bisabolol
(Fragrance, Skin Conditioning, Soothing)
2
A
Tromethamine
(Fragrance, Ph Adjuster, Buffering Agent, Masking)
1
A
Ethylhexylglycerin
(Deodorant, Skin Conditioning)
1
Adenosine
(Skin Conditioning)
2
A
Hydrogenated Lecithin
(Skin Conditioning, Emulsifying, Surfactant, Suspending Agent Nonsurfactant)
1
A
Allantoin
(Skin Conditioning, Skin Protecting, Soothing)
Good for Oily Skin
Good for Oily Skin
Good for Sensitive Skin
Good for Sensitive Skin
1
Glutathione
(Fragrance, Reducing)
1
Ceramide NP
(Hair Conditioning, Skin Conditioning)
1
A
Beta-Glucan
(Bulking Agent, Skin Conditioning)
1
A
Dipotassium Glycyrrhizate
(Flavoring Agent, Skin Conditioning, Humectant)
TOCOPHEROL
(Antioxidant, Fragrance, Skin Conditioning)
ASCORBIC ACID
(Antioxidant, Buffering, Fragrance, Skin Conditioning)
1
Ascorbyl Glucoside
(Antioxidant)
3
Tocopheryl Acetate
(Antioxidant, Skin Conditioning)
Bad for Oily Skin
Bad for Oily Skin
1
A
Hydroxypropyl Cyclodextrin
(Chelating Agent, Emulsion Stabilising, Masking, Skin Conditioning)
1
Ubiquinone
(Antioxidant, Skin Conditioning)
2
Thioctic Acid
(Antioxidant)
3
B
Potassium Hydroxide
(Ph Adjuster, Buffering Agent)
1
A
Behenyl Alcohol
(Binding Agent, Emulsion Stabilising, Viscosity Increasing Agent, Binding, Emollient, Viscosity Controlling)
1
A
Carbomer
(Emulsion Stabilising, Viscosity Increasing Agent, Gel Forming, Viscosity Controlling)
1
A
Xanthan Gum
(Binding Agent, Emulsion Stabilising, Skin Conditioning, Surfactant Emulsifying Agent, Viscosity Increasing Agent, Binding, Gel Forming, Viscosity Controlling)
1
A
Disodium EDTA
(Chelating Agent, Viscosity Controlling)

My Ingredient Notes

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Key ingredients

Vaccinium Vitis-Idaea Fruit Extract
Antioxidant
Butylene Glycol
Skin Conditioning, Humectant
Niacinamide
Skin Conditioning
Panthenol
Skin Conditioning
Tranexamic Acid
Skin Conditioning
Neopentyl Glycol Dicaprate
Skin Conditioning, Emollient

Benefits

Good for dry skin
Good for oily/acne-prone skin
Good for sensitive skin

Concerns

Not fungal acne (malassezia) safe

Ingredients explained

Vaccinium Vitis-Idaea Fruit Extract
Antioxidant
Low-hazard ingredient.Read moreShow less
EWG 1 Antioxidant
Niacinamide
Hair conditioning, Skin conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A Hair conditioningSkin conditioningSmoothing
Tranexamic Acid
Cosmetic astringent, Skin conditioning
Limited public safety data.Read moreShow less
EWG N/A Cosmetic astringentSkin conditioning
Water
Solvent
Low-hazard ingredient.Read moreShow less
EWG 1 Solvent
1,2-Hexanediol
Solvent
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A Solvent
Neopentyl Glycol Dicaprate
Skin conditioning, Emollient
Low-hazard ingredient.Read moreShow less
EWG 1 Skin conditioningEmollientViscosity increasing agent
Caprylic/Capric Triglyceride
Emollient, Masking
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A EmollientMaskingPerfumingSkin conditioningSolvent
Sorbitol
Flavoring agent, Fragrance
Low-hazard ingredient.Read moreShow less
EWG 1 Flavoring agentFragranceHumectantPlasticizerSkin conditioning
Bifida Ferment Lysate
Skin conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 Skin conditioning
Chondrus Crispus Extract
Skin conditioning, Viscosity controlling
Limited public safety data.Read moreShow less
EWG N/A Skin conditioningViscosity controlling
Butyrospermum Parkii Butter
Skin conditioning, Viscosity controlling
Limited public safety data.Read moreShow less
EWG N/A Skin conditioningViscosity controlling
Saccharum Officinarum Extract
Moisturising, Skin conditioning
Limited public safety data.Read moreShow less
EWG N/A MoisturisingSkin conditioning
Alpha-Arbutin
Antioxidant, Skin conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 AntioxidantSkin conditioning
Melia Azadirachta Flower Extract
Skin conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 Skin conditioning
Ocimum Sanctum Leaf Extract
Skin conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 Skin conditioning
+ 26 more — see the full ingredients list above
Butylene Glycol
Fragrance, Skin conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A FragranceSkin conditioningSolventViscositydecreasing agentHumectantMaskingViscosity controlling Good for Dry Skin
Panthenol
Antistatic agent, Hair conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A Antistatic agentHair conditioningSkin conditioning Good for Dry Skin
Sodium Hyaluronate
Skin conditioning, Humectant
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A Skin conditioningHumectant Good for Dry Skin
Glycerin
Denaturant, Fragrance
Low-hazard ingredient.Read moreShow less
EWG 2 CIR A DenaturantFragranceHair conditioningHumectantOral care agentOral health care drugSkin protectingViscosity decreasing agentPerfumingSolvent Good for Dry SkinFungal-acne trigger
Allantoin
Skin conditioning, Skin protecting
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A Skin conditioningSkin protectingSoothing Good for Oily SkinGood for Sensitive Skin
Tocopheryl Acetate
Antioxidant, Skin conditioning
Potentially comedogenic - can block poresRead moreShow less
EWG 3 AntioxidantSkin conditioning Bad for Oily Skin

How to use

How to use

  • 1 Morning works well: Antioxidants like vitamin C pair well with daytime use under sunscreen.

General guidance from this product's category and active ingredients — always follow the directions on the package.

Trust & honesty

Effective levels — general guide

The concentrations these actives are typically effective at in research — not a measurement of this product.

Vitamin C (ascorbic) 5–20%

L-ascorbic acid is usually used at 5–20% (around 10–15% is common). Above ~20% adds little and tends to irritate more; it also needs a low pH to work.

3-O-ETHYL ASCORBIC ACID, ASCORBIC ACID, Ascorbyl Glucoside

Niacinamide 2–5% (up to 10%)

Most research uses 2–5%; some formulas go to 10%. Very high levels can cause flushing in sensitive skin.

Niacinamide

INCI lists don't disclose amounts, and we don't claim to know this product's levels — these are the ranges these ingredients are usually effective at, so you can tell a real formula from "fairy-dusting" a marketed active. How we estimate this.

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