Line Smoother 8% Glycolic Acid Treatment
The Jack Black Line Smoother 8% Glycolic Acid Treatment is a treatment. Our analysis of its 31 ingredients (22 low-risk) rates it Excellent (97/100).
The Jack Black Line Smoother 8% Glycolic Acid Treatment is a treatment. Our analysis of its 31 ingredients (22 low-risk) rates it Excellent (97/100).
Summarised from our ingredient analysis — not brand marketing copy.
The evidence
Dry Skin
8/9
Oily/Acne-Prone Skin
No data
Sensitive Skin
5/7
| EWG | CIR | Ingredient Name & Cosmetic Functions | Notes |
|---|---|---|---|
1
|
|
Water
(Solvent) |
|
4
|
B
|
Glycolic Acid
(Exfoliant, Ph Adjuster, Buffering Agent) |
Good for Oily Skin
Bad for Sensitive 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
|
A
|
C12-15 Alkyl Benzoate
(Skin Conditioning, Emollient, Antimicrobial) |
|
|
1
|
A
|
Stearic Acid
(Fragrance, Sufactant, Emulsifying, Surfactantsurfactant Cleansing Agent Is Included As A Function For The Soap Form Of Stearic Acid., Emulsion Stabilising, Masking, Refatting) |
Bad for Oily Skin
Fungal Acne Trigger
|
|
1
|
A
|
Caprylic/Capric Triglyceride
(Emollient, Masking, Perfuming, Skin Conditioning, Solvent) |
|
|
3
|
B
|
Sodium Hydroxide
(Denaturant, Ph Adjuster, Buffering Agent) |
|
|
1
|
A
|
Glyceryl Stearate
(Emollient, Emulsifying) |
Fungal Acne Trigger
|
|
3
|
A
|
Dimethicone
(Antifoaming Agent, Skin Protecting, Emollient, Skin Conditioning) |
Silicone
|
|
|
Sodium Acrylate/Sodium Acryloyldimethyl Taurate/Acrylamide Copolymer
(Anticaking Agent, Emulsion Stabilising, Opacifying, Viscosity Controlling) |
|
|
1
|
A
|
Panthenol
(Antistatic Agent, Hair Conditioning, Skin Conditioning) |
Good for Dry Skin
|
|
1
|
A
|
Allantoin
(Skin Conditioning, Skin Protecting, Soothing) |
Good for Oily Skin
Good for Sensitive Skin
|
|
|
|
Retinyl Palmitate
(Skin Conditioning, Skin Conditioning Miscellaneous) |
|
|
3
|
|
Tocopheryl Acetate
(Antioxidant, Skin Conditioning) |
Bad for Oily Skin
|
|
|
B
|
Aloe Barbadensis Leaf Juice
(Skin Conditioning) |
Good for Sensitive Skin
|
|
|
|
Lavandula Angustifolia Flower Extract
(Cleansing, Deodorant, Fragrance, Refreshing, Tonic) |
|
|
|
|
Salvia Officinalis Leaf Extract
(Anti Seborrheic, Cleansing, Oral Care, Skin Conditioning, Tonic) |
|
|
|
|
Vitis Vinifera Seed Extract
(Anti Seborrheic, Antimicrobial, Antioxidant, Oral Care, Skin Protecting, Uv Absorber) |
|
|
|
|
glycyrrhiza glabra root extract
(Bleaching, Perfuming, Skin Conditioning, Skin Conditioning Emollient, Smoothing, Soothing) |
|
|
1
|
A
|
Cetyl Alcohol
(Emulsion Stabilising, Fragrance, Opacifying, Emulsifying, Surfactant, Foam Boosting, Viscosity Increasing Agent, Emollient, Masking, Viscosity Controlling) |
|
|
1
|
A
|
Sorbitan Stearate
(Fragrance, Emulsifying, Surfactant) |
Fungal Acne Trigger
|
|
1
|
A
|
Xanthan Gum
(Binding Agent, Emulsion Stabilising, Skin Conditioning, Surfactant Emulsifying Agent, Viscosity Increasing Agent, Binding, Gel Forming, Viscosity Controlling) |
|
|
1
|
A
|
Magnesium Aluminum Silicate
(Absorbent, Anticaking Agent, Opacifying, Slip Modifier, Viscosity Increasing Agent, Viscosity Controlling) |
|
|
1
|
A
|
Hydroxyethylcellulose
(Binding Agent, Emulsion Stabilising, Film Forming, Viscosity Increasing Agent, Binding, Stabilising, Viscosity Controlling) |
|
|
1
|
B
|
Isohexadecane
(Skin Conditioning, Emollient, Solvent) |
|
|
3
|
B
|
Polysorbate 80
(Denaturant, Emulsifying, Surfactant) |
Fungal Acne Trigger
|
|
3
|
A
|
PEG-100 Stearate
(Surfactant) |
Fungal Acne Trigger
|
|
2
|
A
|
Chlorphenesin
(Cosmetic Biocide, Antimicrobial, Preservative) |
|
|
1
|
A
|
Dehydroacetic Acid
(Preservative) |
|
|
5
|
A
|
Benzyl Alcohol
(External Analgesic, Fragrance, Oral Health Care Drug, Preservative, Solvent, Viscosity Decreasing Agent, Masking) |
Allergens
|
|
3
|
B
|
Propylene Glycol
(Fragrance, Humectant, Skin Conditioningagent Miscellaneous, Solvent, Viscosity Decreasing Agent, Skin Conditioning, Viscosity Controlling) |
Good for Dry Skin
|
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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.
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.
The concentrations these actives are typically effective at in research — not a measurement of this product.
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
OTC leave-on AHAs are usually 5–10%. The effect also depends on pH and free-acid value, not the percentage alone.
Glycolic 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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