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Keratin Smooth+ Professional Shampoo
Decode Label Safety Score
How we got 5.0 ShowHide
Methodology v3.1 (updated 8 Oct 2026) — what changed
This shampoo contains Sodium Laureth Sulfate, a common surfactant that can be irritating to sensitive skin and may carry trace amounts of 1,4-dioxane (a manufacturing by-product that IARC classifies as possibly carcinogenic, Group 2B). The product also includes 'Fragrance' and several declared fragrance allergens, which are a primary concern for individuals with fragrance sensitivities or contact allergies. While it contains some beneficial ingredients like Argania Spinosa Kernel Oil and Hydrolyzed Keratin, these are listed in trace amounts and are not primary drivers of the formulation's performance or safety profile. It is generally suitable for most users, but those with sensitive skin or known fragrance allergies should exercise caution.
At a glance
From the declared label — not a lab testFindings to weigh
Contains common irritant surfactant and multiple fragrance allergens
This shampoo uses Sodium Laureth Sulfate, a surfactant known to cause irritation in some individuals and which may contain a trace impurity, 1,4-dioxane, classified as a possible carcinogen. The product also contains an undisclosed 'Fragrance' blend along with several individually declared fragrance allergens, which are a significant concern for people with sensitive skin or fragrance allergies. While it includes some conditioning ingredients, these are present in very small amounts.
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- Ingredients you avoid. Sulphates, parabens, silicones, fragrance, drying alcohol, PEGs and more.
- Sensitivities. Sensitive skin, hormonal considerations, pregnancy.
- Skin and hair goals. Acne, dryness, ageing, hair fall, dandruff: what the label declares for each.
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Concern breakdown
Score out of 10 · higher = fewer concernsHow this product performs on each concern we check for haircare. This is a breakdown of the same evidence behind the score above — not a separate verdict.
Why the score is capped
Primary surfactant with recognised irritation potential (EU SCCS)
Rule PC-CAP-05
High load of declared fragrance allergens (EU-listed)
Rule PC-CAP-03
Watch out for
Sodium Laureth Sulfate (SLES) is a common surfactant that can be harsh and irritating to sensitive skin or scalp. It is also associated with the potential presence of 1,4-dioxane, a manufacturing impurity classified by IARC as Group 2B (possibly carcinogenic to humans). While SCCS considers levels below 10 ppm safe in finished products, its presence is a concern for some consumers.
The product contains 'Fragrance' and a high load of individually declared fragrance allergens (Linalool, Benzyl Salicylate, Citronellol, ALPHA-ISOMETHYL IONONE, Hexyl Cinnamal). These are common sensitizers and can trigger allergic reactions or contact dermatitis in susceptible individuals.
Cocamidopropyl Betaine, while generally milder than some other surfactants, is a known contact allergen for a subset of the population, often due to impurities from its manufacturing process.
Silicones like Dimethiconol and Amodimethicone are present, which can lead to product build-up on hair over time, potentially weighing it down or making it feel greasy if not properly clarified.
TEA-Dodecylbenzenesulfonate — an anionic surfactant that can be a skin irritant, especially in higher concentrations or with prolonged contact.
Disodium EDTA — disodium EDTA is a chelating agent that keeps a product stable and clear. It has been flagged in some studies for potential endocrine-disrupting properties; regulatory consensus is not yet established, so it is noted as a low-level concern rather than a confirmed hazard.
Ingredient Concerns safety database
Sources cited below may be Indian (FSSAI) or international (EU, US, WHO, IARC) — an international classification or law is evidence, not an Indian regulatory finding.
Sodium Benzoate (E211)
Benzoates are permitted preservatives with an established acceptable daily intake. Two documented concerns: in acidic drinks that also contain ascorbic acid (vitamin C) they can slowly form small amounts of benzene, especially with heat and light (US FDA beverage survey, 2006); and sodium benzoate was one of the additives in the Southampton study mixtures associated with hyperactivity in children. It can also trigger reactions in some people with asthma or urticaria.
Regulatory & scientific authority Source: EFSA re-evaluation of benzoic acid and benzoates (2016); US FDA benzene-in-beverages survey (2006); McCann et al., Lancet 2007
Sodium Benzoate: regulation, sources and other products →Sodium Laureth Sulfate
SLES is a cleansing agent that is milder than SLS but can still irritate very sensitive or compromised skin. Separately, because it is made by ethoxylation, it may carry a residue of 1,4-dioxane, which IARC classifies as possibly carcinogenic to humans (Group 2B). The ingredient list cannot show whether any is present or how much. The EU SCCS considers 1,4-dioxane at or below 10 ppm in a finished cosmetic to be safe, and manufacturers reduce it by vacuum stripping.
Regulatory & scientific authority Source: FDA; EU SCCS
Sodium Laureth Sulfate: regulation, sources and other products →Fragrance Allergens (EU-listed)
These are individual fragrance components that are known contact allergens. EU rules require them to be named on the label when present above 0.001% (leave-on) or 0.01% (rinse-off), because "parfum" alone would hide them. Limonene and linalool are especially common and become more allergenic as they oxidise on exposure to air. This is a risk for people who are sensitised, not a general-population hazard.
Regulatory & scientific authority Source: EU Regulation 2023/1545 (extended fragrance-allergen labelling); SCCS opinions on fragrance allergens
Fragrance Allergens (EU-listed): regulation, sources and other products →Fragrance
"Fragrance" or "parfum" is a catch-all term that can conceal a blend of hundreds of undisclosed chemicals, including known allergens, sensitisers, and potential endocrine disruptors. The EU now mandates disclosure of 82 specific fragrance allergens. People with fragrance sensitivity, asthma, or contact dermatitis should prefer fragrance-free products.
Regulatory & scientific authority Source: EU Regulation 2023/1545; IFRA
Fragrance: regulation, sources and other products →Cocamidopropyl Betaine
Cocamidopropyl betaine is the usual "gentle" co-surfactant in shampoos, face washes and baby washes. It was named Allergen of the Year by the American Contact Dermatitis Society in 2004; the reactions are attributed mainly to impurities (amidoamine, DMAPA) and are uncommon, but it is a common cause of surfactant allergy in people with eczema.
Peer-reviewed research Source: American Contact Dermatitis Society - Allergen of the Year 2004; contact-dermatitis literature
Cocamidopropyl Betaine: regulation, sources and other products →Decode Label Analysis
Contains Sodium Laureth Sulfate, a primary surfactant that can be irritating to sensitive skin and may carry a 1,4-dioxane impurity (IARC Group 2B, possibly carcinogenic to humans). The EU SCCS considers ≤10 ppm of 1,4-dioxane safe in finished cosmetic products.
Contains 'Fragrance' (undisclosed blend) and multiple declared fragrance allergens (Linalool, Benzyl Salicylate, Citronellol, ALPHA-ISOMETHYL IONONE, Hexyl Cinnamal), which are common causes of skin sensitization and allergic reactions.
Cocamidopropyl Betaine, a mild surfactant, is a recognized contact allergen for some individuals, mainly due to manufacturing impurities.
Combined Effects interactions
Cocamidopropyl Betaine is often used to mitigate the irritation potential of harsher surfactants like Sodium Laureth Sulfate, but it is also a known allergen itself.
The combination of an undisclosed 'Fragrance' blend with multiple individually declared fragrance allergens significantly increases the overall potential for allergic reactions and skin sensitization, particularly for individuals with fragrance sensitivities.
Claim check
Front-of-pack marketing claims checked against this product's actual ingredients and nutrition. "Can't verify" means the label does not provide enough information to check the claim — it is not the same as the claim being false.
The claim 'USED BY PROFESSIONALS' is a marketing statement about usage by a specific group, which cannot be verified from the ingredient list or other label information.
The claim 'UP TO 72H FRIZZ CONTROL' is a performance claim that cannot be verified from the ingredient list or other label information.
The term 'PROFESSIONAL SHAMPOO' is a product designation that cannot be verified from the ingredient list or other label information.
The ingredient 'HYDROLYZED KERATIN' is listed, supporting the 'KERATIN' part of the claim.
The ingredients 'HYDROLYZED KERATIN' and 'ARGANIA SPINOSA (ARGAN OIL) KERNEL OIL' are both listed, supporting the claim.
Read straight from the back-of-pack photo — quantities, sections and any disguised terms, so the small print can’t hide behind the marketing.
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1.
WaterWATER
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2.
Sodium Laureth SulfateSODIUM LAURETH SULFATE
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3.
DimethiconolDIMETHICONOL
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4.
Trideceth-10TRIDECETH-10
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5.
Tea-DodecylbenzenesulfonateTEA-DODECYLBENZENESULFONATE
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6.
Cocamidopropyl BetaineCOCAMIDOPROPYL BETAINE
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7.
Sodium ChlorideSODIUM CHLORIDE
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8.
Fragrance undisclosed fragranceFRAGRANCE
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9.
AmodimethiconeAMODIMETHICONE
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10.
Cetrimonium ChlorideCETRIMONIUM CHLORIDE
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11.
Trideceth-12TRIDECETH-12
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12.
Sodium BenzoateSODIUM BENZOATE
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13.
Citric AcidCITRIC ACID
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14.
CarbomerCARBOMER
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15.
Glycol DistearateGLYCOL DISTEARATE
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16.
Guar Hydroxypropyltrimonium ChlorideGUAR HYDROXYPROPYLTRIMONIUM CHLORIDE
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17.
MicaMICA
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18.
Titanium DioxideTITANIUM DIOXIDE
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19.
Disodium EDTADISODIUM EDTA
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20.
Hydrolyzed KeratinHYDROLYZED KERATIN
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21.
Argania Spinosa Kernel Oil trace amountARGANIA SPINOSA (ARGAN OIL) KERNEL OIL
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22.
Sodium HydroxideSODIUM HYDROXIDE
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23.
LinaloolLINALOOL
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24.
Benzyl SalicylateBENZYL SALICYLATE
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25.
CitronellolCITRONELLOL
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26.
Alpha-Isomethyl IononeALPHA-ISOMETHYL IONONE
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27.
Hexyl CinnamalHEXYL CINNAMAL
Trace amounts: some named ingredients appear in token quantities or low in the list. At these concentrations a meaningful benefit is unlikely, and their front-of-pack prominence may not reflect their level in the formulation.
In label order — normally largest quantity first. Select a row for the full write-up and sources.
Fragrance allergens are substances EU cosmetics rules require to be named on the label (such as Limonene and Linalool). Fragrant botanicals such as essential oils are grouped with them because they can naturally contain such substances, but they are not on that list. They matter mainly for people with fragrance allergies or already-sensitive skin — not a general-population safety issue. Each named allergen takes a small deduction from the ingredient score, and a high count can cap it; fragrant botanicals take none. Naming them on the label is a transparency positive.
✓ Decode Label Assessment: Favorable ⚠ Decode Label Assessment: Concern Decode Label Assessment: Neutral
Who should take caution
About this ingredient
Declared on this label as
No detailed safety data in our database yet for this ingredient.
Learn More
Compare with other shampoo products
Assessed using the same Decode Label methodology, sorted by score. Each score reflects the information available for that product at the time of assessment.
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What are the ingredients in Keratin Smooth+ Professional Shampoo?
The label of Keratin Smooth+ Professional Shampoo lists 27 ingredients, in label order: Water, Sodium Laureth Sulfate, Dimethiconol, Trideceth-10, TEA-Dodecylbenzenesulfonate, Cocamidopropyl Betaine, Sodium Chloride, Fragrance, Amodimethicone, Cetrimonium Chloride, Trideceth-12, Sodium Benzoate, Citric Acid, Carbomer, Glycol Distearate, Guar Hydroxypropyltrimonium Chloride, Mica, Titanium Dioxide, Disodium EDTA, Hydrolyzed Keratin, Argania Spinosa Kernel Oil, Sodium Hydroxide, Linalool, Benzyl Salicylate, Citronellol, ALPHA-ISOMETHYL IONONE, Hexyl Cinnamal. Flagged by the analysis: Sodium Laureth Sulfate, Cocamidopropyl Betaine, Fragrance, TEA-Dodecylbenzenesulfonate, Disodium EDTA.
Is Keratin Smooth+ Professional Shampoo safe to use?
Keratin Smooth+ Professional Shampoo scores 5.0/10 on Decode Label (Moderate). This shampoo uses Sodium Laureth Sulfate, a surfactant known to cause irritation in some individuals and which may contain a trace impurity, 1,4-dioxane, classified as a possible carcinogen. The product also contains an undisclosed 'Fragrance' blend along with several individually declared fragrance allergens, which are a significant concern for people with sensitive skin or fragrance allergies. While it includes some conditioning ingredients, these are present in very small amounts.
Why does Keratin Smooth+ Professional Shampoo score 5.0/10?
Flagged in the score: Sodium Laureth Sulfate (SLES) is a common surfactant that can be harsh and irritating to sensitive skin or scalp. It is also associated with the potential presence of 1,4-dioxane, a manufacturing impurity classified by IARC as Group 2B (possibly carcinogenic to humans). While SCCS considers levels below 10 ppm safe in finished products, its presence is a concern for some consumers. The product contains 'Fragrance' and a high load of individually declared fragrance allergens (Linalool, Benzyl Salicylate, Citronellol, ALPHA-ISOMETHYL IONONE, Hexyl Cinnamal). These are common sensitizers and can trigger allergic reactions or contact dermatitis in susceptible individuals. Cocamidopropyl Betaine, while generally milder than some other surfactants, is a known contact allergen for a subset of the population, often due to impurities from its manufacturing process.
Who should avoid Keratin Smooth+ Professional Shampoo?
The points the analysis notes are most relevant to: Sensitive skin or scalp; Fragrance allergy or contact dermatitis; Avoiding ethoxylated ingredients due to 1,4-dioxane concerns; Avoiding isothiazolinone preservatives.
Does Keratin Smooth+ Professional Shampoo contain allergens?
Yes — the label lists 5 fragrance allergens: Linalool, Benzyl Salicylate, Citronellol, ALPHA-ISOMETHYL IONONE and Hexyl Cinnamal. These matter mainly if you have sensitive skin or a known fragrance allergy.
Does Keratin Smooth+ Professional Shampoo contain fragrance?
Yes — the ingredient list includes Fragrance. Fragrance is declared as a single ingredient, so the individual scent chemicals in it are not named; the label does separately list 5 fragrance allergens (Linalool, Benzyl Salicylate, Citronellol, ALPHA-ISOMETHYL IONONE and Hexyl Cinnamal). This matters mainly if you have sensitive skin or a known fragrance allergy.
Are the claims on the Keratin Smooth+ Professional Shampoo pack accurate?
Decode Label checked 5 claims against the ingredient list and nutrition panel. "TRESemmé USED BY PROFESSIONALS" — can't be verified from the label. "UP TO 72H FRIZZ CONTROL" — can't be verified from the label. "PROFESSIONAL SHAMPOO" — can't be verified from the label.
Answers are generated from this product's own Decode Label analysis — the score, the ingredient list and the label claims shown above. Always check the pack itself for allergen and dietary information.
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About this analysis: Based on declared label information and available evidence. Decode Label does not independently laboratory-test products, and a score is not a regulatory determination or medical advice.
Disclaimer: Safety scores are Decode Label-generated assessments based on publicly available regulatory data (FSSAI, WHO, EFSA, IARC) and peer-reviewed research. They are not a substitute for professional medical advice, and they are not a regulatory determination, a laboratory safety certification or a medical diagnosis. Ingredient safety can vary by individual health conditions, concentration, and usage context. Decode Label is an independent information service and scores every brand by the same rules. No brand pays for or influences its score. Our founder also founded the personal-care brand Botani Bestie (see our story); its products are scored exactly like everyone else's. Data limitations: This assessment is based on the information declared on the product label and the evidence sources above — Decode Label does not independently laboratory-test this product. Ingredient concentrations, sourcing and manufacturing can vary between batches and are not always disclosed. A finding that is not shown here means it was not identified from the available label information, not that it has been ruled out.
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