PEPTIDE PREP™ Clarifying Detox Shampoo
The K18 Hair PEPTIDE PREP™ Clarifying Detox Shampoo is a misc. Our analysis of its 18 ingredients (13 low-risk) rates it Excellent (89/100). Based on its ingredients, it looks well-suited to oily / acne-prone skin. Heads up: it contains fragrance, which can irritate sensitive or reactive skin.
The K18 Hair PEPTIDE PREP™ Clarifying Detox Shampoo is a misc. Our analysis of its 18 ingredients (13 low-risk) rates it Excellent (89/100). Based on its ingredients, it looks well-suited to oily / acne-prone skin. Heads up: it contains fragrance, which can irritate sensitive or reactive skin.
Summarised from our ingredient analysis — not brand marketing copy.
The evidence
Dry Skin
2/5
Oily/Acne-Prone Skin
1/0
Sensitive Skin
1/5
| EWG | CIR | Ingredient Name & Cosmetic Functions | Notes |
|---|---|---|---|
1
|
|
Water
(Solvent) |
|
|
2
|
B
|
Sodium C14-16 Olefin Sulfonate
(Cleansing, Foaming, Surfactant) |
Sulfate
|
|
1
|
|
Cocamidopropyl Hydroxysultaine
(Antistatic Agent, Hair Conditioning, Skin Conditioning, Sufactant, Foam Boosting, Viscosity Increasing Agent, Viscosity Controlling) |
|
4
|
B
|
Salicylic Acid
(Antiacne Agent, Antidandruff Agent, Corn/Callus/Wart Remover, Denaturant, Exfoliant, Fragrance, Hair Conditioning, Skin Conditioning, Keratolytic, Masking, Preservative) |
Good for Oily Skin
Bad for Sensitive Skin
|
|
1
|
|
Charcoal Powder
(Abrasive, Absorbent, Colorant, Opacifying, Cosmetic Colorant) |
|
|
|
Sh-Oligopeptide-78
(Hair Conditioning, Surfactant Cleansing) |
|
|
1
|
A
|
Panthenol
(Antistatic Agent, Hair Conditioning, Skin Conditioning) |
Good for Dry Skin
|
|
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
Fungal Acne Trigger
|
|
1
|
|
Sodium Phytate
(Chelating Agent, Oral Care Agent) |
|
|
1
|
A
|
Guar Hydroxypropyltrimonium Chloride
(Antistatic Agent, Hair Conditioning, Viscosity Increasing Agent, Film Forming, Skin Conditioning, Viscosity Controlling) |
|
|
1
|
A
|
Caprylyl Glycol
(Hair Conditioning, Skin Conditioning, Emollient, Humectant) |
|
|
1
|
|
Caprylhydroxamic Acid
(Chelating Agent) |
|
|
2
|
A
|
Citric Acid
(Chelating Agent, Fragrance, Ph Adjuster, Buffering Agent, Masking) |
Bad for Sensitive Skin
|
|
3
|
B
|
Potassium Hydroxide
(Ph Adjuster, Buffering Agent) |
|
|
3
|
B
|
Sodium Hydroxide
(Denaturant, Ph Adjuster, Buffering Agent) |
|
|
|
|
PARFUM
(Fragrance, Perfuming) |
|
7
|
|
Benzyl Salicylate
(Fragrance, Uv Absorber, Masking) |
Allergens
|
|
6
|
|
Limonene
(Deodorant, Perfuming, Solvent) |
Allergens
|
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EWG flags hazard, not real-world risk — ratings don't account for how much of an ingredient a product contains. Treat these as things to research, not verdicts. How we score →
How to use
General guidance from this product's category and active ingredients — always follow the directions on the package.
Trust & honesty
Contains ingredients some choose to avoid or double-check while pregnant or nursing.
Low-strength topical salicylic acid (BHA) is generally considered fine. Caution is usually reserved for high-strength leave-on products and salicylic peels.
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.
The concentrations these actives are typically effective at in research — not a measurement of this product.
Salicylic acid is OTC-capped at 2%; 0.5–2% is the usual leave-on range. Much below that it acts more as a soothing agent than an exfoliant.
Salicylic 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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