20% Vitamin C Brightening Serum

OAM

Where to buy Possibly in stock

About this product

The OAM 20% Vitamin C Brightening Serum is a serums, essence, ampoule. Our analysis of its 21 ingredients (16 low-risk) rates it Excellent (98/100). 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
Serums, Essence, Ampoules
Ingredients
21
Low-risk
16
Fragrance
Fragrance-free
Origin
United States

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 2/0
Good for dry skin
Trimethylsiloxysilicate Cyclopentasiloxane
Oily/Acne-Prone Skin 1/0
Good for oily/acne-prone skin
Sodium Ascorbyl Phosphate
Sensitive Skin 8/2
Good for sensitive skin
Sodium Ascorbyl Phosphate Superoxide Dismutase Ascorbyl Glucoside Ascorbyl Palmitate Alpha-Arbutin Ubiquinone Tetrahexyldecyl Ascorbate Tocopheryl Acetate
Caution for sensitive skin
Ascorbyl Palmitate Phenoxyethanol

Ingredients list

21 total
Lower hazard (1) Higher hazard (4)
All21 Skin Conditioning23 Antioxidant9 Solvent3 Hair Conditioning2 Emollient2 Fragrance2 Antifoaming Agent1 Masking1
EWG CIR Ingredient Name & Cosmetic Functions Notes
1
Methyl Trimethicone
(Hair Conditioning, Skin Conditioning, Solvent)
1
Tetrahexyldecyl Ascorbate
(Antioxidant, Skin Conditioning)
3
A
Cyclopentasiloxane
(Hair Conditioning, Skin Conditioning, Emollient, Solvent)
Silicone
Silicone
1
B
Trimethylsiloxysilicate
(Antifoaming Agent, Emollient, Skin Conditioning)
1
A
Ascorbyl Palmitate
(Antioxidant, Masking)
Fungal Acne
Fungal Acne Trigger
Ascorbic Acid/Orange/Citrus Limon/Citrus Aurantifolia Polypeptides
(Skin Conditioning)
1
Ascorbyl Glucoside
(Antioxidant)
ASCORBIC ACID
(Antioxidant, Buffering, Fragrance, Skin Conditioning)
1
A
Sodium Ascorbyl Phosphate
(Antioxidant)
1
Palmitoyl Tripeptide-28
(Skin Conditioning)
1
Phyllanthus Emblica Extract
(Skin Conditioning)
1
Arctostaphylos Uva Ursi Leaf Extract
(Skin Conditioning)
Citrus Grandis
(Not Reported)
1
Ubiquinone
(Antioxidant, Skin Conditioning)
3
Tocopheryl Acetate
(Antioxidant, Skin Conditioning)
Bad for Oily Skin
Bad for Oily Skin
1
Superoxide Dismutase
(Reducing, Skin Conditioning, Antioxidant)
1
A
Phospholipids
(Skin Conditioning)
1
Alpha-Arbutin
(Antioxidant, Skin Conditioning)
Retinyl Palmitate
(Skin Conditioning, Skin Conditioning Miscellaneous)
1
Water
(Solvent)
4
A
Phenoxyethanol
(Fragrance, Preservative)
Paraben
Paraben

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

Methyl Trimethicone
Skin Conditioning
Tetrahexyldecyl Ascorbate
Antioxidant, Skin Conditioning
Cyclopentasiloxane
Skin Conditioning, Emollient
Trimethylsiloxysilicate
Emollient, Skin Conditioning
Ascorbyl Palmitate
Antioxidant
Ascorbic Acid/Orange/Citrus Limon/Citrus Aurantifolia Polypeptides
Skin Conditioning

Benefits

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

Concerns

Contains paraben
Contains silicone
Not fungal acne (malassezia) safe

Ingredients explained

Methyl Trimethicone
Hair conditioning, Skin conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 Hair conditioningSkin conditioningSolvent
Tetrahexyldecyl Ascorbate
Antioxidant, Skin conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 AntioxidantSkin conditioning
Trimethylsiloxysilicate
Antifoaming agent, Emollient
Low-hazard ingredient.Read moreShow less
EWG 1 CIR B Antifoaming agentEmollientSkin conditioning
Ascorbic Acid/Orange/Citrus Limon/Citrus Aurantifolia Polypeptides
Skin conditioning
Limited public safety data.Read moreShow less
EWG N/A Skin conditioning
Ascorbyl Glucoside
Antioxidant
Low-hazard ingredient.Read moreShow less
EWG 1 Antioxidant
ASCORBIC ACID
Antioxidant, Buffering
Limited public safety data.Read moreShow less
EWG N/A AntioxidantBufferingFragranceSkin conditioning
Sodium Ascorbyl Phosphate
Antioxidant
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A Antioxidant
Palmitoyl Tripeptide-28
Skin conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 Skin conditioning
Phyllanthus Emblica Extract
Skin conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 Skin conditioning
Arctostaphylos Uva Ursi Leaf Extract
Skin conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 Skin conditioning
Citrus Grandis
Not reported
Limited public safety data.Read moreShow less
EWG N/A Not reported
Ubiquinone
Antioxidant, Skin conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 AntioxidantSkin conditioning
Superoxide Dismutase
Reducing, Skin conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 ReducingSkin conditioningAntioxidant
Phospholipids
Skin conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A Skin conditioning
Alpha-Arbutin
Antioxidant, Skin conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 AntioxidantSkin conditioning
+ 2 more — see the full ingredients list above
Cyclopentasiloxane
Hair conditioning, Skin conditioning
Low-to-moderate hazard.Read moreShow less
EWG 3 CIR A Hair conditioningSkin conditioningEmollientSolvent Silicone
Ascorbyl Palmitate
Antioxidant, Masking
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A AntioxidantMasking Fungal-acne trigger
Tocopheryl Acetate
Antioxidant, Skin conditioning
Potentially comedogenic - can block poresRead moreShow less
EWG 3 AntioxidantSkin conditioning Bad for Oily Skin
Phenoxyethanol
Fragrance, Preservative
Low-to-moderate hazard.Read moreShow less
EWG 4 CIR A FragrancePreservative Paraben

How to use

How to use

  • 1 Where it fits: Apply after toner and before moisturiser — thinnest to thickest.
  • 2 Evening: Use at night — start 2–3× a week and build up as your skin tolerates it.
  • 3 Wear SPF the next day: Acids and retinoids increase sun sensitivity — daily sunscreen is a must while using this.

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

Trust & honesty

Pregnancy & breastfeeding

Contains ingredients some choose to avoid or double-check while pregnant or nursing.

Often avoided
Retinoids (Vitamin A) (Retinyl Palmitate)

Topical retinoids (retinol, retinaldehyde, retinyl esters) are widely advised against in pregnancy as a precaution. The strongest evidence is for ORAL retinoids; topical absorption is low, but most clinicians err on the side of caution.

This is general information, not medical advice. Pregnancy guidance varies and depends on concentration and your individual situation — always check with your doctor, midwife or pharmacist. How we flag this.

Effective levels — general guide

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

Retinoids (Vitamin A) 0.01–1%

Most studied between 0.1% and 1%. Higher is not automatically better — irritation climbs with dose, so a well-formulated lower strength is often the sweet spot.

Retinyl Palmitate

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.

Tetrahexyldecyl Ascorbate, Ascorbyl Palmitate, Ascorbic Acid/Orange/Citrus Limon/Citrus Aurantifolia Polypeptides, Ascorbyl Glucoside, ASCORBIC ACID, Sodium Ascorbyl Phosphate

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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