Safety Guide

Is Methylisothiazolinone Safe for Acne?

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

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Generally Safe

Methylisothiazolinone is generally considered safe for acne-prone skin and is not known to clog pores.

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 Rosacea Eczema Sensitive Skin

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See the full list of ingredients to avoid for acne.

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.