Biosilk
Biosilk Silk Therapy Irresistible
A weightless leave-in silk treatment that repairs, smooths, and protects all hair types, providing strength, shine, and moisture with a blend of jasmine and honey scent.
Sulfate-free
Paraben-free
Color-safe
Silicone-free
Natural
Protein-free
Optimized for Your Environment & Lifestyle
Nykaa
In stock
Recommended
Biosilk Silk Therapy Irresistible
Biosilk
biosilk-silk-therapy-irresistible
Leave-In Reconstructing Treatment
10407555006757
Morning or Evening?
How often will you use this product?
Notes
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Your Biodata Compatibility Analysis
Based on your 6 hair health indices and environmental factors
Poor Match
Significant incompatibilities
Growth Cycle Health Index
Hair Match
Hair Health Index Alignment
Optimal for OSI, SSI, DI, HSI
Ingredient Efficacy
Matching Ingredient Score
Environment Compatibility
Current UV, Air Quality & Humidity
Why This Works for Your Specific Profile
Damage Index:
Damage levels outside specified range may not benefit optimally from product formulation
Water Quality:
Dry or dull hair experiences increased brittleness from protein concentration without moisture balance
Hair:
Closed to moderately open cuticles limit product penetration causing surface buildup or inadequate absorption
Active Lifestyle:
Activity levels outside optimal range affect product performance and maintenance requirements
Your Hair Profile Integration
Your Hair Archetype
Density Level
Washing Frequency
Shedding Level
Oil Level
Your Hair Health Indices
Oil Secretion (OSI)
Very low oil production
Scalp Sensitivity (SSI)
Very low sensitivity
Growth Rate (CMR)
Poor metabolism rate
Damage Index (DI)
Minimal damage
Hair Strength (HSI)
Very weak strength
Softness Index (SI)
Significant improvement needed
Water & Environmental Integration
Water:
Expected Results & Timeline
Key Highlights
What is it?
Leave-In Reconstructing Treatment, 10 ingredients
Who Is It For
Adults, All Genders
Budget
Rs. 1,894.75 - Rs. 3,789.50
Timeline
Immediate shine and smoothness; continued use improves hair strength and elasticity over time.
Why Youโll Love It
What Does It Help With?
Damage Repair, Dryness, Frizz, Split Ends
Best for
Damage Repair
Features
Repairs and protects hair, Provides strength and volume, Adds shine and tames frizz, Protects against UVA/UVB rays, Improves elasticity and moisture retention
Checks
Sulfate-free, Paraben-free, Silicone-free
Ingredients Overview
Ingredients List
Cyclopentasiloxane, Dimethiconol, Alcohol Denat., Ethyl Ester of Hydrolyzed Silk, Panthenol, C12-15 Alkyl Benzoate, Fragrance (Parfum), Benzyl Benzoate, Benzyl Salicylate, Citronellol, Coumarin, Geraniol, Hexyl Cinnamal, Limonene, Linalool
Key Ingredients
Cyclopentasiloxane, Dimethiconol, Ethyl Ester of Hydrolyzed Silk, Panthenol
Ingredients Details
Alcohol Denat.
Common Name(s): Alcohol denat.,denatured ethanol,solvent antimicrobial astringent
CAS Number: N/a
DESCRIPTION
What It Does: Alcohol denat. dissolves oil-soluble and water-soluble cosmetic actives, provides rapid antimicrobial activity at concentrations above 60โ70% by denaturing microbial proteins, delivers a refreshing cooling sensation through evaporative cooling on skin, and temporarily enhances the penetration of topical actives by transiently disrupting the stratum corneum lipid bilayer organisation.
Why It's Used: Formulators choose alcohol denat. for its irreplaceable combination of solvent power, antimicrobial activity, and penetration-enhancing properties. no other cosmetic solvent simultaneously provides the cooling sensory experience of alcohol (from evaporative cooling at the skin surface), the immediate antimicrobial activity required for sanitisers (from protein denaturation above 60%), and the transient sc lipid disruption that improves active ingredient delivery (essential in actives-rich toners and essences). for denatured alcohol specifically, denaturing agents (typically 5% isopropanol or bitrex) prevent consumption without affecting cosmetic function.
How It Works: Alcohol denat. works through multiple mechanisms depending on concentration: (1) solvent action โ alcohol's hydroxyl group provides hydrogen bonding with water while the short alkyl chain provides interaction with organic solutes, enabling dissolution of both hydrophilic and moderately lipophilic cosmetic actives in a single solvent; (2) antimicrobial โ above 60% concentration, ethanol denatures microbial proteins by disrupting non-covalent bonds maintaining protein secondary and tertiary structure โ the alcohol molecules intercalate between protein chains, disrupting the hydrophobic interactions and hydrogen bonds that maintain enzyme active site geometry. this non-specific protein denaturation is immediately bactericidal and virucidal with no resistance mechanism possible; (3) sc penetration enhancement โ at lower concentrations (5โ30%), ethanol transiently fluidises the sc lipid bilayer by intercalating between the ordered lipid lamellae, disrupting the crystal packing and increasing lipid bilayer fluidity. this transient fluidisation increases the diffusion coefficient of co-applied actives through the sc for up to 30 minutes post-application; (4) astringency โ alcohol's protein precipitating action at the skin surface contracts superficial proteins, temporarily tightening pores and reducing oiliness.
Typically Found In: Toners,hand sanitisers,actives serums
TECHNICAL DETAILS
Primary Category: Active ingredient โ cosmetic active
Secondary Functions: Skin conditioning
Application Areas:
Facial Skincare
Body Care
Hair Care
Beard Care
Color Cosmetics (Makeup)
Dietary/Oral Supplements
Typical Concentration Range: 5%โ95%
SOURCING & ETHICS
Vegan Status: Yes
Halal Status: Yes
Source Notes: Commercially produced for cosmetic use. verify vegan/halal status with supplier.
SKIN COMPATIBILITY
Irritancy Rating: 1/5 โ very low
Comedogenicity Rating: 0/5 โ non-comedogenic
Sensitivity Concerns: Well-tolerated by most skin types.
Safe for Sensitive Skin: Yes
SAFETY & COMPATIBILITY
Safety Profile: Good safety profile at recommended concentrations. ewg score: 1โ2.
Works Well With: Standard skincare actives
Avoid Combining With: No known significant incompatibilities
SCIENTIFIC NOTE
Ethanol concentration-dependent antimicrobial efficacy: below 40% โ minimal bactericidal effect (insufficient protein denaturation); 40โ60% โ bacteriostatic, not bactericidal; 60โ70% โ peak bactericidal efficacy against both enveloped and non-enveloped viruses and vegetative bacteria (optimal water content maintains protein hydration required for denaturation to proceed); 80โ90% โ remains effective but slightly reduced from decreased water activity; 95โ100% โ reduced efficacy (insufficient water for protein denaturation). the 70% 'sweet spot' for sanitisers reflects this concentration-efficacy peak, not a formulation convenience.
Last Verified: Cosing database,alcohol denat. ethanol solvent antimicrobial review
Primary Sources: 2026-03-12
Benzyl Benzoate
Common Name(s): Benzyl ester of benzoic acid,scabimite
CAS Number: 120-51-4
DESCRIPTION
What It Does: Provides fixative fragrance and solvent properties with anti-mite activity.
Why It's Used: Natural ester fragrance compound occurring in jasmine and ylang ylang providing fixative and solvent benefits in fragranced cosmetics.
How It Works: Ester of benzyl alcohol and benzoic acid. solvent for difficult-to-dissolve fragrance compounds. penetrates insect/mite cuticle for scabicidal activity. mild skin fixative from ester-protein interactions.
Typically Found In: Fragrances,floral compounds,medical scabies treatment
TECHNICAL DETAILS
Primary Category: Fragrance component / scabicide
Secondary Functions: Skin conditioning
Application Areas:
Facial Skincare
Body Care
Hair Care
Beard Care
Color Cosmetics (Makeup)
Dietary/Oral Supplements
Typical Concentration Range: 0.001%โ1%
SOURCING & ETHICS
Vegan Status: Yes โ from jasmine, ylang ylang, peru balsam
Halal Status: Yes
Source Notes: Commercially produced for cosmetic use. verify vegan/halal status with supplier.
SKIN COMPATIBILITY
Irritancy Rating: 1/5 โ very low
Comedogenicity Rating: 0/5 โ non-comedogenic
Sensitivity Concerns: Well-tolerated by most skin types.
Safe for Sensitive Skin: Yes
SAFETY & COMPATIBILITY
Safety Profile: Eu cosmetics regulation: declared fragrance allergen. ifra guidelines apply.
Works Well With: Standard skincare actives
Avoid Combining With: No known significant incompatibilities
SCIENTIFIC NOTE
Benzyl benzoate's natural occurrence in jasmine absolute (up to 6%) means that products containing jasmine absolute naturally contain benzyl benzoate as a declared fragrance allergen โ regardless of whether the formulator intentionally added it. this highlights how natural ingredients can automatically generate regulatory allergen declarations.
Last Verified: Cosing database,ifra standards
Primary Sources: 2026-03-12
Benzyl Salicylate
Common Name(s): Benzyl 2-hydroxybenzoate,salicylate ester
CAS Number: 118-58-1
DESCRIPTION
What It Does: Provides floral-balsamic scent with uv-absorbing fixative properties.
Why It's Used: Natural jasmine-associated fragrance ester with mild uv protection contribution for fragranced sun-exposed products.
How It Works: Salicylate ester absorbs uv-b mildly. provides fixative function by slowing evaporation of lighter fragrance top notes. naturally in jasmine absolute (1-3%). good skin absorption.
Typically Found In: Floral fragrances,sun-exposed products
TECHNICAL DETAILS
Primary Category: Fragrance component โ floral fixative
Secondary Functions: Skin conditioning
Application Areas:
Facial Skincare
Body Care
Hair Care
Beard Care
Color Cosmetics (Makeup)
Dietary/Oral Supplements
Typical Concentration Range: 0.001%โ1%
SOURCING & ETHICS
Vegan Status: Yes โ from jasmine absolute, or synthetic
Halal Status: Yes
Source Notes: Commercially produced for cosmetic use. verify vegan/halal status with supplier.
SKIN COMPATIBILITY
Irritancy Rating: 1/5 โ very low
Comedogenicity Rating: 0/5 โ non-comedogenic
Sensitivity Concerns: Well-tolerated by most skin types.
Safe for Sensitive Skin: Yes
SAFETY & COMPATIBILITY
Safety Profile: Eu cosmetics regulation: declared fragrance allergen. ifra guidelines apply.
Works Well With: Standard skincare actives
Avoid Combining With: No known significant incompatibilities
SCIENTIFIC NOTE
Benzyl salicylate's salicylate moiety provides uv absorption in the uvb range (absorbs at 295-315nm) despite not being a registered uv filter. its occurrence in jasmine absolute means natural jasmine-fragranced products inherently contain a mild uv absorber โ an incidental benefit of the natural fragrance chemistry that wasn't intentionally designed as photoprotection.
Last Verified: Cosing database,ifra standards
Primary Sources: 2026-03-12
C12-15 Alkyl Benzoate
Common Name(s): C12-15 alkyl benzoate,cosmetic active,functional ingredient
CAS Number: N/a
DESCRIPTION
What It Does: Delivers characteristic cosmetic function at recommended use concentration.
Why It's Used: Selected for functional contribution and formulation compatibility supported by cosmetic science and regulatory safety data.
How It Works: Works through the mechanism of its molecular class โ physicochemical or biological interaction with skin proteins, lipids, or receptors as documented in peer-reviewed cosmetic literature.
Typically Found In: Skin care formulations
TECHNICAL DETAILS
Primary Category: Active ingredient โ cosmetic active
Secondary Functions: Skin conditioning
Application Areas:
Facial Skincare
Body Care
Hair Care
Beard Care
Color Cosmetics (Makeup)
Dietary/Oral Supplements
Typical Concentration Range: 0.1%โ10%
SOURCING & ETHICS
Vegan Status: Conditional
Halal Status: Yes
Source Notes: Commercially produced for cosmetic use. verify vegan/halal status with supplier.
SKIN COMPATIBILITY
Irritancy Rating: 1/5 โ very low
Comedogenicity Rating: 0/5 โ non-comedogenic
Sensitivity Concerns: Well-tolerated by most skin types.
Safe for Sensitive Skin: Yes
SAFETY & COMPATIBILITY
Safety Profile: Good safety profile at recommended concentrations. ewg score: 1โ2.
Works Well With: Standard skincare actives
Avoid Combining With: No known significant incompatibilities
SCIENTIFIC NOTE
C12-15 alkyl benzoate has an established safety and efficacy profile within the cosmetic regulatory framework at standard use concentrations.
Last Verified: Cosing database,c12-15 alkyl benzoate technical literature
Primary Sources: 2026-03-12
Personalized Usage Instructions
How to Use
Step 1
Shake well before use
Step 2
Place a small amount in palms and apply from scalp to ends
Step 3
May be used on wet or dry hair or skin
Step 4
Use as often as necessary
Medical Chemicals
Protein/Moisture
- Moisture
pH Level
- Acidic
Porosity Taget
- Normal Porosity
Customized for Your Profile
Scalp Condtions
Anti-Dandruff, Sensitive Scalp, pH Balanced
Climate Suitability
Humid, Dry, UV Protection
Clinical Claims
Contains silk proteins that strengthen hair and provide more body and volume; improves elasticity that can hold moisture up to 3 times its own weight.
Frequency
Shake well before use. Place a small amount in palms and apply from scalp to ends. May be used on wet or dry hair or skin. Use as often as necessary.
Product Information
Sulfate-free
Paraben-free
Silicone-free