Biosilk Silk Therapy 17 Miracle Leave-In Conditioner Unisex 2.26 oz
Analysis updated August 2026 · How Scout scores
At a glance
Summary
This leave-in conditioner contains beneficial ingredients like hydrolyzed silk, panthenol, and behentrimonium chloride, which are known for their conditioning and moisturizing properties. However, the presence of non-water-soluble silicones such as cyclopentasiloxane and cyclohexasiloxane can lead to buildup on the hair, and the inclusion of multiple fragrance components increases the risk of irritation and allergic reactions. These factors, combined with the processed nature of the product, impact its overall rating.
Key ingredients 23
Hydrolyzed SilkGood
Hydrolyzed Silk is a protein derived from silk that helps to strengthen and protect hair. It penetrates the hair shaft to improve elasticity and shine. It is valued for its ability to enhance hair's appearance and texture.
Risks
There are no significant risks associated with Hydrolyzed Silk in hair care products.
Benefits
It provides strength and shine to the hair, making it look healthier and more vibrant.
PanthenolGood
Panthenol, also known as provitamin B5, is a moisturizing agent that helps to improve hair's elasticity and moisture retention. It penetrates the hair shaft to provide long-lasting hydration. It is widely used for its beneficial effects on hair health.
Risks
There are minimal risks associated with Panthenol, though some individuals may experience mild irritation.
Benefits
It enhances moisture retention, making hair softer and more resilient.
Aqua/Water/EauNeutral
Water is a common solvent used in cosmetic formulations. It helps to dissolve other ingredients and provides a base for the product. It is generally considered safe and non-reactive.
Risks
There are no significant risks associated with water in cosmetic products.
Benefits
Water helps to hydrate and distribute other ingredients evenly across the hair.
Cetearyl AlcoholNeutral
Standard formulation ingredient — neither beneficial nor harmful at typical use.
Risks
There are minimal risks associated with Cetearyl Alcohol, though some individuals may experience mild irritation.
Benefits
It helps to smooth and soften the hair, improving manageability and texture.
Behentrimonium ChlorideNeutral
Behentrimonium Chloride is a conditioning agent that helps to detangle and smooth hair. It is effective in reducing static and frizz. It is generally considered safe for use in hair care products.
Risks
In rare cases, it may cause irritation to sensitive scalps.
Benefits
It improves hair manageability and reduces static, making hair easier to style.
Quaternium-80Neutral
Quaternium-80 is a conditioning agent that enhances the texture and feel of hair. It helps to reduce static and improve combability. It is considered safe for use in hair care products.
Risks
There is a potential for mild irritation in sensitive individuals.
Benefits
It provides conditioning benefits, making hair smoother and easier to manage.
CyclopentasiloxaneNeutral
Cyclopentasiloxane is a silicone used to provide smoothness and shine to hair. It helps to reduce frizz and improve the overall appearance of hair. It is generally considered safe for use in cosmetics.
Risks
There is a potential for buildup on hair with prolonged use.
Benefits
It imparts a silky feel and enhances shine, making hair look healthier.
CyclohexasiloxaneNeutral
Cyclohexasiloxane is a silicone that provides a lightweight, silky feel to hair. It helps to improve the spreadability of products and adds shine. It is considered safe for use in hair care formulations.
Risks
Like other silicones, it may cause buildup on hair over time.
Benefits
It enhances the smoothness and shine of hair, improving its overall appearance.
Caprylyl GlycolNeutral
Caprylyl Glycol is a skin conditioning agent that also acts as a preservative booster. It helps to improve the texture and feel of hair care products. It is considered safe for use in cosmetics.
Risks
There are minimal risks associated with Caprylyl Glycol, though it may cause irritation in sensitive individuals.
Benefits
It enhances the moisturizing properties of formulations, contributing to smoother hair.
Hexylene GlycolNeutral
Hexylene Glycol is a solvent and viscosity agent used in cosmetic formulations. It helps to improve the spreadability and texture of products. It is generally recognized as safe for use in cosmetics.
Risks
Some individuals may experience skin irritation or allergic reactions.
Benefits
It contributes to the smooth application and consistency of hair care products.
Benzyl BenzoateNeutral
Benzyl Benzoate is used as a fragrance ingredient and solvent in cosmetic products. It helps to dissolve other ingredients and enhance the scent profile. It is generally considered safe for use in cosmetics.
Risks
In high concentrations, it may cause skin irritation or allergic reactions.
Benefits
It contributes to the fragrance and stability of the product.
Hexyl CinnamalNeutral
Hexyl Cinnamal is a fragrance ingredient used to impart a floral scent to cosmetic products. It is commonly used in perfumes and scented formulations. It is considered safe for use in cosmetics at low concentrations.
Risks
It may cause allergic reactions or skin irritation in sensitive individuals.
Benefits
It enhances the fragrance profile of the product, providing a pleasant scent.
Alpha-Isomethyl IononeNeutral
Alpha-Isomethyl Ionone is a fragrance ingredient used to impart a floral scent to cosmetic products. It is commonly used in perfumes and scented formulations. It is considered safe for use in cosmetics at low concentrations.
Risks
It may cause allergic reactions or skin irritation in sensitive individuals.
Benefits
It enhances the fragrance profile of the product, providing a pleasant scent.
CitronellolNeutral
Citronellol is a fragrance ingredient used to impart a floral scent to cosmetic products. It is commonly used in perfumes and scented formulations. It is considered safe for use in cosmetics at low concentrations.
Risks
It may cause allergic reactions or skin irritation in sensitive individuals.
Benefits
It enhances the fragrance profile of the product, providing a pleasant scent.
GeraniolNeutral
Geraniol is a fragrance ingredient used to impart a floral scent to cosmetic products. It is commonly used in perfumes and scented formulations. It is considered safe for use in cosmetics at low concentrations.
Risks
It may cause allergic reactions or skin irritation in sensitive individuals.
Benefits
It enhances the fragrance profile of the product, providing a pleasant scent.
HydroxycitronellalNeutral
Hydroxycitronellal is a fragrance ingredient used to impart a floral scent to cosmetic products. It is commonly used in perfumes and scented formulations. It is considered safe for use in cosmetics at low concentrations.
Risks
It may cause allergic reactions or skin irritation in sensitive individuals.
Benefits
It enhances the fragrance profile of the product, providing a pleasant scent.
Propylene GlycolBad
Processed additive flagged under Scout's ingredient doctrine.
Risks
Some individuals may experience skin irritation or allergic reactions.
Benefits
It helps to maintain moisture levels in the hair, preventing dryness and brittleness.
PhenoxyethanolBad
Processed additive flagged under Scout's ingredient doctrine.
Risks
In high concentrations, it may cause skin irritation or allergic reactions.
Benefits
It helps to maintain product integrity by preventing contamination and spoilage.
Potassium SorbateBad
Synthetic preservative — flagged in daily-use products.
Risks
In rare cases, it may cause skin irritation or allergic reactions.
Benefits
It helps to maintain product freshness and prevent spoilage.
LinaloolBad
Processed additive flagged under Scout's ingredient doctrine.
Risks
It may cause allergic reactions or skin irritation in sensitive individuals.
Benefits
It provides a pleasant floral scent to the product.
Butylphenyl MethylpropionalBad
Butylphenyl Methylpropional, also known as Lilial, is a fragrance ingredient used to impart a floral scent to cosmetic products. It has been associated with potential allergenic effects and is restricted in some regions. It is often criticized for its potential to cause skin sensitivity.
Risks
It may cause allergic reactions and skin irritation, especially in sensitive individuals.
Benefits
It provides a floral scent to the product, enhancing the user experience.
EugenolBad
Processed additive flagged under Scout's ingredient doctrine.
Risks
It may cause allergic reactions or skin irritation in sensitive individuals.
Benefits
It enhances the fragrance profile of the product, providing a spicy scent.
Fragrance (Parfum)Very Bad
Fragrance is used to impart a pleasant scent to cosmetic products. However, it can contain a mixture of undisclosed chemicals that may cause irritation or allergic reactions. It is often criticized for its potential to cause skin sensitivity.
Risks
Fragrance can trigger allergic reactions and skin irritation, especially in sensitive individuals.
Benefits
It provides a pleasant scent to the product, enhancing the user experience.
Processing
Processed Foods
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