Triple C Lightning Liquid

CosRX

Where to buy Possibly in stock

About this product

The CosRX Triple C Lightning Liquid is a serums, essence, ampoule. Our analysis of its 10 ingredients (10 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
Serums, Essence, Ampoules
Ingredients
10
Low-risk
10
Fragrance
Fragrance-free
Status
Discontinued
Data updated
May 2026

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
Butylene Glycol Sodium Hyaluronate Sodium Lactate
Oily/Acne-Prone Skin 2/0
Good for oily/acne-prone skin
Glycyrrhiza Glabra (Licorice) Leaf Extract Ascorbic Acid (Vitamin C)
Sensitive Skin 2/2
Good for sensitive skin
Ascorbic Acid (Vitamin C) Allantoin
Caution for sensitive skin
Butylene Glycol Ascorbic Acid (Vitamin C)

Ingredients list

10 total
Lower hazard (1) Higher hazard (3)
All10 Skin Conditioning12 Humectant3 Skin Protecting2 Buffering Agent2 Film Forming2 Masking2 Fragrance2 Solvent2
EWG CIR Ingredient Name & Cosmetic Functions Notes
1
A
1,2-Hexanediol
(Solvent)
1
A
Glycyrrhiza Glabra (Licorice) Leaf Extract
(Skin Conditioning)
1
Cassia Obtusifolia Seed Extract
(Skin Conditioning)
1
Aronia Melanocarpa Fruit Extract
(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
A
Sodium Hyaluronate
(Skin Conditioning, Humectant)
Good for Dry Skin
Good for Dry Skin
1
A
Pullulan
(Binding Agent, Film Forming, Binding)
1
A
Ascorbic Acid (Vitamin C)
(Antioxidant, Fragrance, Ph Adjuster, Skin Conditioning, Buffering Agent, Masking)
Good for Dry Skin
Good for Dry Skin
3
B
Sodium Lactate
(Buffering Agent, Exfoliant, Humectant, Keratolytic)
1
A
Allantoin
(Skin Conditioning, Skin Protecting, Soothing)
Good for Oily Skin
Good for Oily Skin
Good for Sensitive Skin
Good for Sensitive Skin

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

Vitamin C
Brightens, evens tone, and supports collagen.
Hyaluronic Acid
Hydrates by attracting and holding water.
Antioxidants
Shields skin from free radical damage.

Benefits

HydratingBoosts hydration and relieves dry, tight skin.
Barrier RepairStrengthen and restore your skin's natural barrier.
Redness ReducingSoothes visible redness and calms irritation.
Scar HealingImproves the look of marks and scars.
Anti-AgingSoftens lines and helps skin look youthful.
BrighteningRestores radiance to dull, tired skin.
Reduces IrritationEases discomfort and supports skin resilience.
Dark SpotsFades dark spots for even skin tone.

Concerns

No major concerns flagged

Ingredients explained

1,2-Hexanediol
Solvent
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A Solvent
Glycyrrhiza Glabra (Licorice) Leaf Extract
Skin conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A Skin conditioning
Cassia Obtusifolia Seed Extract
Skin conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 Skin conditioning
Aronia Melanocarpa Fruit Extract
Skin conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 Skin conditioning
Pullulan
Binding agent, Film forming
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A Binding agentFilm formingBinding
Sodium Lactate
Buffering agent, Exfoliant
Low-to-moderate hazard.Read moreShow less
EWG 3 CIR B Buffering agentExfoliantHumectantKeratolytic
Butylene Glycol
Fragrance, Skin conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A FragranceSkin conditioningSolventViscositydecreasing agentHumectantMaskingViscosity controlling 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
Ascorbic Acid (Vitamin C)
Antioxidant, Fragrance
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A AntioxidantFragrancePh adjusterSkin conditioningBuffering agentMasking Good for Dry Skin
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

How to use

How to use

  • 1 Where it fits: Apply after toner and before moisturiser — thinnest to thickest.
  • 2 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 (Vitamin C)

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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From the SkinCarisma community

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3 reviews restored from our original community.

savemyskin · Dry skin
BlackheadsSensitiveDehydrated

Nothing fades dark marks and brightens my skin like this serum/ampule. This was formulated by CosRX and Charlotte Cho - Founder of Soko Glam. It is similar to Klairs freshly juiced vitamin C serum, however the CosRx version contains 20.5% Vitamin C which makes it infinitely more powerful. Within one week I could see a remarkable improvement in my skin - it was brighter, less pigmented and there were no breakouts. I use a few drops of this every few nights as this is very strong and it makes y...

SkinCarisma member · Oily skin
PIHAcneBlackheads

Left a 5-star rating.

savemyskin · Oily skin
PIHAcneAnti-Aging

Left a 5-star rating.

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