Safety Guide

Is Methylisothiazolinone Safe for Rosacea?

Evidence-based safety information for using Methylisothiazolinone for rosacea-prone skin.

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Use with Caution

Methylisothiazolinone is flagged as potentially irritating for sensitive skin, which includes rosacea. Use with caution and patch test.

About Methylisothiazolinone

The preservative the American Contact Dermatitis Society named "Allergen of the Year" in 2013 — for a reason.

Evidence Rating

Key Considerations

No specific health considerations documented for this ingredient.

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Pregnancy Acne Eczema Sensitive Skin

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See the full list of ingredients to avoid for rosacea.

Disclaimer: This information is for educational purposes only and is not medical advice. Always consult a qualified healthcare provider or dermatologist before making changes to your skincare routine, especially during pregnancy or if you have a medical condition.