Why are these products flagged for Methylisothiazolinone?

Each product listed has been independently scanned and confirmed to list Methylisothiazolinone (or its aliases) in its ingredient panel.

Should I throw these out?

Not necessarily. Methylisothiazolinone risk depends on serving size, age, and individual sensitivity. Tap a product for its full risk breakdown.

Products that contain Methylisothiazolinone: 2026 audit list

Answer: We've identified 16 US products that list Methylisothiazolinone (or one of its aliases) in their ingredient panel. Browse the list below or tap any item for its full ingredient breakdown.

See Methylisothiazolinone-free picks →Why Methylisothiazolinoneis flagged →

Products containing Methylisothiazolinone

Avoid
TRESemmé Botanique Coconut Nourish Shampoo
TRESemmé
Avoid
Herbal Essences Hello Hydration Moisturizing Shampoo
Herbal Essences
Avoid
Garnier Fructis Sleek & Shine Shampoo
Garnier
Avoid
TRESemmé Keratin Smooth Shampoo
TRESemmé
Avoid
Old Spice Timber Body Wash

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