methylisothiazolinone
Also listed as: MIT, MI
High-efficiency synthetic preservative. Documented in vitro to possess endocrine-disrupting potential, mimicking estrogen. Suspected of contributing to bioaccumulation in dermal tissues.
- MicroplasticsNot flagged
- SugarsNot flagged
- Seed OilsNot flagged
- Skin
- Immune System
- Hormones / Endocrine
- FDAAllowed under maximum safety concentration thresholds
- EFSAStrictly restricted; select variants banned in leave-on baby products
PubMed References
Endocrine-disrupting properties and systemic absorption of methylisothiazolinone(2022)
PubMed (PMID 28914602)→Last reviewed: May 2026
FAQ
Is methylisothiazolinone bad for you?
High-efficiency synthetic preservative. Documented in vitro to possess endocrine-disrupting potential, mimicking estrogen. Suspected of contributing to bioaccumulation in dermal tissues.
What does methylisothiazolinone do to your body?
methylisothiazolinone primarily affects: Skin, Immune System, Hormones / Endocrine.
How often is it safe to consume methylisothiazolinone?
Daily: Avoid — known endocrine disruptor risk. Weekly: Limit exposure to minimize bioaccumulation. Monthly: Generally tolerated.
What products contain methylisothiazolinone?
methylisothiazolinone is commonly found in cosmetic, household products. Use the Zeral app to scan any product and instantly see if it contains methylisothiazolinone.
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Medical Disclaimer: The information on this page is compiled from peer-reviewed scientific studies and regulatory reports. It is intended for general awareness and educational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition.