Olaplex
Olaplex No. 9 Bond Protector Heat Protection & Frizz Reduction Nourishing Hair Serum
Olaplex No. 9 Bond Protector Nourishing Hair Serum is a leave-in, silicone-free hair serum to shield from pollution and heat that cause tangles, breakage, and static. Olaplex Bond Building Technology is paired with potent, antioxidant-rich red algae extract to nourish hair, block pollutants, and neutralize free radicals. See satin shine, style memory, bounceback curls, anti-tangle and anti-static action, and heat protection up to 450 degree F. For all hair types.
Silicone-free
Heat Protection
Bond Building
Frizz
Breakage
Damage Repair
Optimized for Your Environment & Lifestyle
Nykaa
In stock
Recommended
Olaplex No. 9 Bond Protector Heat Protection & Frizz Reduction Nourishing Hair Serum
Olaplex
olaplex-no-9-bond-protector-heat-protection-frizz-reduction-nourishing-hair-serum
Hair Serum
10202950861093
Morning or Evening?
How often will you use this product?
Notes
Secure payment protection
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:
Fine hair becomes weighed down and greasy from heavy formulation
Hair:
Closed cuticles resist product penetration causing surface buildup without internal benefits
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?
Hair Serum with Olaplex Bond Building Technology and antioxidant-rich red algae extract
Who Is It For
Adults, All Genders
Budget
$33.69 - $67.38
Timeline
Why Youโll Love It
What Does It Help With?
Tangles, Breakage, Static, Frizz, Heat damage
Best for
Damage Repair
Features
Leave-in serum, Silicone-free, Protects from pollution and heat up to 450 F, Red algae extract nourishes hair, Anti-tangle and anti-static, Heat protection, Style memory, Satin shine, Suitable for all hair types
Checks
100% Authentic
Ingredients Overview
Ingredients List
water-(aqua/eau), propanediol, betaine, quaternium-22, sodium-hyaluronate, bis-aminopropyl-diglycol-dimaleate, cetrimonium-chloride, panthenol, hydroxyethylcellulose, pvp, guar-hydroxypropyltrimonium-chloride, furcellaria-lumbricalis-extract, pelvetia-canaliculata-extract, xylitylglucoside, polyquaternium-44, anhydroxylitol, maltitol, citric-acid, trisodium-ethylenediamine-disuccinate, xylitol, sorbic-acid, phenoxyethanol, ethylhexylglycerin, sodium-benzoate, fragrance-(parfum), citral, citronellol, hexyl-cinnamal, limonene, linalool
Key Ingredients
Bis-Aminopropyl Diglycol Dimaleate, Red algae extract (Furcellaria Lumbricalis Extract, Pelvetia Canaliculata Extract), Sodium Hyaluronate, Panthenol
Ingredients Details
Anhydroxylitol
Common Name(s): Anhydroxylitol,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
Anhydroxylitol has an established safety and efficacy profile within the cosmetic regulatory framework at standard use concentrations.
Last Verified: Cosing database,anhydroxylitol technical literature
Primary Sources: 2026-03-12
Betaine
Common Name(s): Trimethylglycine,tmg,natural betaine
CAS Number: 107-43-7
DESCRIPTION
What It Does: Provides osmoprotective humectant conditioning with anti-irritant and mild foam-boosting activity.
Why It's Used: Natural-origin multifunctional osmolyte from sugar beet providing hydration, anti-irritancy, and conditioning in virtually every cosmetic category.
How It Works: Quaternary ammonium betaine provides zwitterionic character for water binding via ionic hydration. osmoprotective function at 100โ500mm as compatible solute protecting cells from osmotic stress. reduces surfactant irritation by competing with sls for protein binding sites. mild foam enhancement.
Typically Found In: Virtually all categories โ moisturisers, shampoos, cleansers
TECHNICAL DETAILS
Primary Category: Functional ingredient โ humectant
Secondary Functions: Tewl reduction,skin plumping
Application Areas:
Facial Skincare
Body Care
Hair Care
Beard Care
Color Cosmetics (Makeup)
Dietary/Oral Supplements
Typical Concentration Range: 0.5%โ10%
SOURCING & ETHICS
Vegan Status: Yes โ from beta vulgaris (sugar beet) molasses
Halal Status: Yes
Source Notes: Synthetic or naturally derived. excellent aqueous solubility.
SKIN COMPATIBILITY
Irritancy Rating: 1/5 โ very low
Comedogenicity Rating: 0/5 โ non-comedogenic
Sensitivity Concerns: Non-irritating; suitable for all skin types.
Safe for Sensitive Skin: Yes
SAFETY & COMPATIBILITY
Safety Profile: Excellent safety profile. ewg score: 1.
Works Well With: Ceramides,emollients,occlusives,glycerin,hyaluronic acid
Avoid Combining With: No significant incompatibilities
SCIENTIFIC NOTE
Betaine's anti-irritant mechanism for surfactant systems involves competitive protein protection: betaine at high concentrations preferentially interacts with skin proteins, occupying binding sites that would otherwise be occupied by surfactant molecules causing protein denaturation. this competition reduces available protein binding for irritating surfactants, explaining betaine's well-documented ability to reduce sls irritation when co-formulated.
Last Verified: Cosing database,craig betaine osmoprotective review,cir safety assessment
Primary Sources: 2026-03-12
Bis-aminopropyl Diglycol Dimaleate
Common Name(s): Bis-aminopropyl diglycol dimaleate
DESCRIPTION
What It Does: Delivers targeted skin-conditioning or bioactive benefits through a specific mechanism of action suited to the formulation's intended purpose.
Why It's Used: Specialty actives address specific skin concerns through targeted molecular mechanisms, providing efficacy beyond what base formulation ingredients alone can achieve.
How It Works: The bioactive compound interacts with specific molecular targets in skin cells or the extracellular matrix โ enzymes, receptors, structural proteins, or signaling molecules โ triggering beneficial biological responses.
Typically Found In: Serums,treatments,moisturizers,specialty products
TECHNICAL DETAILS
Primary Category: Specialty actives
Secondary Functions: Skin-conditioning,anti-aging
Application Areas:
Facial Skincare
Body Care
Hair Care
Beard Care
Color Cosmetics (Makeup)
Dietary/Oral Supplements
Typical Concentration Range: 0.01โ5%
SOURCING & ETHICS
Vegan Status: Yes
Halal Status: Yes
Source Notes: Specialty active ingredient; check individual sourcing for vegan status.
SKIN COMPATIBILITY
Irritancy Rating: 1
Comedogenicity Rating: 0
Sensitivity Concerns: Low sensitization potential at recommended use concentrations.
Safe for Sensitive Skin: Yes
SAFETY & COMPATIBILITY
Safety Profile: Well-characterized cosmetic ingredient with established safety profile. generally non-irritating at typical use concentrations. suitable for leave-on and rinse-off cosmetics.
Works Well With: Niacinamide,hyaluronic acid,vitamin c,peptides
Avoid Combining With: Incompatible with oxidizing agents; check ph stability
SCIENTIFIC NOTE
Specialty actives typically work through enzyme inhibition (e.g., tyrosinase inhibition for brightening, mmp inhibition for anti-aging), receptor activation (e.g., retinoid receptors, ppar-ฮณ for barrier genes), or transcription factor modulation (e.g., nrf2 for antioxidant gene upregulation). structure-activity relationships determine potency and selectivity.
Last Verified: Cosing eu database; pcpc cosmetic ingredient safety reviews; ingredient-specific safety and efficacy literature
Primary Sources: 2025-01-15
Citral
Common Name(s): 3,7-dimethyl-2,6-octadienal,geranial+neral mix
CAS Number: 5392-40-5
DESCRIPTION
What It Does: Provides the defining intense lemon-citrus fragrance note.
Why It's Used: The lemon scent compound โ citral defines the fresh lemon scent in lemon essential oil and lemongrass with potent antimicrobial activity.
How It Works: Mixture of e-isomer (geranial) and z-isomer (neral). antimicrobial via michael addition to thiol enzymes. inhibits nf-kb for anti-inflammatory activity. antioxidant via allylic aldehyde.
Typically Found In: Citrus fragrances,antibacterial products,lemon-scented cosmetics
TECHNICAL DETAILS
Primary Category: Fragrance component โ lemon aldehyde
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%โ0.5%
SOURCING & ETHICS
Vegan Status: Yes โ from lemon, lemongrass, melissa oils
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. high sensitisation potential from alpha,beta-unsaturated aldehyde structure. ifra strict limits.
Works Well With: Standard skincare actives
Avoid Combining With: No known significant incompatibilities
SCIENTIFIC NOTE
Citral's high sensitisation potential (llna ec3 ~0.11%) is a consequence of its alpha,beta-unsaturated aldehyde structure providing a highly reactive michael acceptor for skin protein covalent binding. the e/z mixture (geranial/neral) in natural citral means both isomers contribute to the sensitisation burden โ explaining why lemongrass oil (very high citral content, ~60-80%) is one of the more common essential oil allergens.
Last Verified: Cosing database,ifra standards
Primary Sources: 2026-03-12
Personalized Usage Instructions
How to Use
Step 1
As the first step in your styling routine, apply a small amount to damp hair working upward from ends to roots
Step 2
Use more as needed for longer, thicker hair
Step 3
Use alone or follow with No
Step 4
6 Bond Smoother for frizz control and/or No
Step 5
7 Bonding Oil for brilliant shine
Step 1
Style as usual - air-dry for a soft texture, blow-dry for a smooth finish, diffuse for waves or curls
Medical Chemicals
Protein/Moisture
- Protein/Moisture balance type
pH Level
-
Porosity Taget
-
Customized for Your Profile
Scalp Condtions
Climate Suitability
Humid, Dry, UV Protection, Pollution Shield, Summer, Winter
Clinical Claims
Frequency
As the first step in your styling routine, apply a small amount to damp hair working upward from ends to roots. Use more as needed for longer, thicker hair. Use alone or follow with No.6 Bond Smoother for frizz control and/or No.7 Bonding Oil for brilliant shine. Style as usual - air-dry for a soft texture, blow-dry for a smooth finish, diffuse for waves or curls.
Product Information
100% Authentic