Sisley Paris Hair Rituel Full Size Revitalizing Fortifying Serum for Scalp Duo at Nordstrom

Glycerin is a humectant that attracts moisture to the hair and scalp. It helps to maintain hydration and improve hair texture. It is generally well-tolerated and beneficial for dry hair.

Panthenol is a form of vitamin B5 that acts as a moisturizer. It helps to improve hair elasticity and moisture retention. It is beneficial for maintaining healthy hair.

Arginine is an amino acid that helps to strengthen hair. It supports hair growth and improves scalp health. It is beneficial for maintaining strong and healthy hair.

Bisabolol is known for its soothing and anti-inflammatory properties. It helps to calm irritated skin and scalp. It is beneficial for sensitive skin types.

Tocopheryl acetate is a form of vitamin E that acts as an antioxidant. It helps to protect hair from environmental damage. It is beneficial for maintaining healthy hair and scalp.

Sage leaf extract is known for its antioxidant and antimicrobial properties. It helps to protect the scalp and hair from damage. It is beneficial for maintaining a healthy scalp environment.

Hydrolyzed rice protein helps to strengthen and volumize hair. It improves hair elasticity and moisture retention. It is beneficial for maintaining strong and healthy hair.

Hydrolyzed vegetable protein helps to strengthen and repair hair. It improves hair texture and moisture retention. It is beneficial for maintaining healthy and resilient hair.

Hydrolyzed linseed extract is rich in omega-3 fatty acids. It helps to nourish and condition the hair. It is beneficial for maintaining healthy and shiny hair.

Water is a common solvent used in cosmetic formulations. It acts as a base for dissolving other ingredients. It does not have direct benefits or risks.

This ingredient is used as an emulsifier and surfactant. It helps to mix oil and water-based ingredients. It is generally considered safe but can be irritating to some.

Pentylene glycol is used as a solvent and skin-conditioning agent. It helps to improve the texture and feel of the product. It is generally considered safe for use in cosmetics.

Pyridoxine HCL is a form of vitamin B6 used in hair care products. It supports healthy hair growth and scalp health. It is generally considered safe for use.

Magnesium aspartate is used as a conditioning agent in hair care products. It helps to improve hair texture and manageability. It is generally considered safe for use.

Zinc gluconate is used for its skin-conditioning properties. It helps to maintain scalp health and reduce dandruff. It is generally considered safe for use.

Copper gluconate is used for its skin-conditioning properties. It supports healthy hair growth and scalp health. It is generally considered safe for use.

Biotinoyl tripeptide-1 is used to support hair strength and growth. It helps to improve hair resilience and thickness. It is generally considered safe for use.

Thymus mastichina flower oil is used for its aromatic properties. It may provide a pleasant scent to the product. It is generally considered safe for use.

Thyme oil is known for its antimicrobial properties. It helps to maintain a healthy scalp environment. It is generally considered safe for use.

PPG-26-Buteth-26 is used as an emulsifier and surfactant. It helps to stabilize formulations and improve texture. It is generally considered safe for use.

Hydroxyethylcellulose is used as a thickening agent. It helps to improve the texture and viscosity of the product. It is generally considered safe for use.

Citric acid is used to adjust the pH of cosmetic formulations. It helps to maintain product stability and effectiveness. It is generally considered safe for use.

Butylene glycol is used as a solvent and conditioning agent. It helps to improve product texture and skin feel. It is generally considered safe for use.

Sodium hydroxide is used to adjust the pH of formulations. It helps to maintain product stability and effectiveness. It is generally considered safe for use in small amounts.

Processed additive flagged under Scout's ingredient doctrine.

Processed additive flagged under Scout's ingredient doctrine.

Processed additive flagged under Scout's ingredient doctrine.

Synthetic preservative that can form benzene in the presence of vitamin C.

Synthetic preservative — flagged in daily-use products.

Processed additive flagged under Scout's ingredient doctrine.

Processed additive flagged under Scout's ingredient doctrine.

Processed additive flagged under Scout's ingredient doctrine.

Denatured alcohol can be drying to the scalp and hair. It is often used to help other ingredients penetrate the skin. However, it can strip natural oils and cause dryness.

Synthetic fragrances can cause irritation and allergic reactions. They are often composed of undisclosed chemicals. They may contribute to skin sensitivity and irritation.