15% Vitamin C Serum

John Jeff

Where to buy Possibly in stock

About this product

The John Jeff 15% Vitamin C Serum is a emulsion. Our analysis of its 10 ingredients (6 low-risk) rates it Excellent (100/100). Based on its ingredients, it looks well-suited to dry skin.

Vegan-friendly Reef-safe

Summarised from our ingredient analysis — not brand marketing copy.

At a glance

Type
Emulsion
Ingredients
10
Low-risk
6
Fragrance
Fragrance-free
Origin
China

The evidence

Quick Product Notes

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

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 3/0
Good for dry skin
Dicaprylyl Carbonate Ethoxydiglycol Butylene Glycol
Oily/Acne-Prone Skin No data
Sensitive Skin 0/2
Caution for sensitive skin
Ethoxydiglycol Butylene Glycol

Ingredients list

10 total
Lower hazard (1) Higher hazard (1)
All10 Skin Conditioning10 Fragrance5 Solvent3 Antioxidant2 Humectant2 Buffering1 Viscosity Decreasing Agent1 Perfuming1
EWG CIR Ingredient Name & Cosmetic Functions Notes
1
Water
(Solvent)
ASCORBIC ACID
(Antioxidant, Buffering, Fragrance, Skin Conditioning)
1
A
Ethoxydiglycol
(Fragrance, Solvent, Viscosity Decreasing Agent, Humectant, Perfuming)
1
Dicaprylyl Carbonate
(Skin Conditioning, Emollient)
1
Caprylyl Methicone
(Skin Conditioning)
1
A
Butylene Glycol
(Fragrance, Skin Conditioning, Solvent, Viscositydecreasing Agent, Humectant, Masking, Viscosity Controlling)
Good for Dry Skin
Good for Dry Skin
1
Troxerutin
(Skin Conditioning)
Bisabolol
(Fragrance, Skin Conditioning, Soothing)
Citrus Reticulata Fruit Extract
(Skin Protecting)
TOCOPHEROL
(Antioxidant, Fragrance, Skin Conditioning)

My Ingredient Notes

No personal ingredient notes yet. Save ingredients to your profile to get good/bad alerts here.

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Key ingredients

ASCORBIC ACID
Antioxidant, Skin Conditioning
Ethoxydiglycol
Humectant
Dicaprylyl Carbonate
Skin Conditioning, Emollient
Caprylyl Methicone
Skin Conditioning
Butylene Glycol
Skin Conditioning, Humectant
Troxerutin
Skin Conditioning

Benefits

Fungal-acne (Malassezia) safe
Good for dry skin

Concerns

May not suit sensitive skin

Ingredients explained

Water
Solvent
Low-hazard ingredient.Read moreShow less
EWG 1 Solvent
ASCORBIC ACID
Antioxidant, Buffering
Limited public safety data.Read moreShow less
EWG N/A AntioxidantBufferingFragranceSkin conditioning
Ethoxydiglycol
Fragrance, Solvent
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A FragranceSolventViscosity decreasing agentHumectantPerfuming
Dicaprylyl Carbonate
Skin conditioning, Emollient
Low-hazard ingredient.Read moreShow less
EWG 1 Skin conditioningEmollient
Caprylyl Methicone
Skin conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 Skin conditioning
Troxerutin
Skin conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 Skin conditioning
Bisabolol
Fragrance, Skin conditioning
Limited public safety data.Read moreShow less
EWG N/A FragranceSkin conditioningSoothing
Citrus Reticulata Fruit Extract
Skin protecting
Limited public safety data.Read moreShow less
EWG N/A Skin protecting
TOCOPHEROL
Antioxidant, Fragrance
Limited public safety data.Read moreShow less
EWG N/A AntioxidantFragranceSkin conditioning
Butylene Glycol
Fragrance, Skin conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A FragranceSkin conditioningSolventViscositydecreasing agentHumectantMaskingViscosity controlling Good for Dry 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.

ASCORBIC ACID

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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