Resistance Conditioner
A conditioner designed to strengthen and repair damaged hair. Contains parabens, artificial fragrance, and colorants, packaged in plastic.
How scores are calculated
Materials (40%): How plastic-free the product is — raw materials, construction, and coatings.
Packaging (20%): Is the product packaged in plastic? Is it recyclable?
Transparency (20%): Does the brand disclose ingredients, sourcing, and manufacturing?
Durability (20%): How long does it last? Longer-lasting products reduce plastic waste over time.
This is a rating of this specific product only — not the company. Other products from this brand may score differently.
Last updated: April 8, 2026
Contains plastic packaging, parabens, artificial fragrance, and colorants. Also contains BHT and Chlorhexidine Digluconate, which can be concerning.
Why We Rated It This Way
Kerastase's Resistance Conditioner is made from Plastic bottle, conditioner liquid (Water, Behentrimonium Chloride, Cetearyl Alcohol, Cetyl Esters, PEG-180, Isononyl Isononanoate, Elaeis Guineensis Oil/Palm Oil, Isopropyl Alcohol, Methylparaben, Hydroxyethylcellulose, 2-Oleamido-1,3-Octadecanediol, BHT, Chlorhexidine Digluconate, Butylphenyl Methylpropional, Amyl Cinnamal, Benzyl Alcohol, Citric Acid, Hexyl Cinnamal, Linalool, Benzyl Salicylate, Glycerin, Trehalose, Tamarindus Indica Seed Polysa
Chemical & Health Analysis
Each chemical of concern is broken down below — what it is, where it comes from in this product, what it does to the body, and who is most at risk.
Various plastic chemicals
Kerastase Resistance Conditioner
Potential skin irritation/sensitization from fragrance, parabens, and Chlorhexidine Digluconate. BHT is a controversial ingredient.
All health claims are based on published, peer-reviewed research from the NIH, WHO, IARC, and peer-reviewed journals. This information is for educational purposes and does not constitute medical advice.
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