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diazolidinyl urea

High Concern

High-efficiency synthetic preservative. Documented in vitro to possess endocrine-disrupting potential, mimicking estrogen. Suspected of contributing to bioaccumulation in dermal tissues.

Recommended safe frequency
dailyAvoid — known endocrine disruptor risk
weeklyLimit exposure to minimize bioaccumulation
monthlyGenerally tolerated
Brand lens check
  • MicroplasticsNot flagged
  • SugarsNot flagged
  • Seed OilsNot flagged
Body systems impacted
  • Skin
  • Immune System
  • Hormones / Endocrine
Regulatory status
  • FDAAllowed under maximum safety concentration thresholds
  • EFSAStrictly restricted; select variants banned in leave-on baby products

PubMed References

Primary Research

Endocrine-disrupting properties and systemic absorption of diazolidinyl urea(2022)

PubMed (PMID 28914602)→

Last reviewed: May 2026

FAQ

Is diazolidinyl urea 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 diazolidinyl urea do to your body?

diazolidinyl urea primarily affects: Skin, Immune System, Hormones / Endocrine.

How often is it safe to consume diazolidinyl urea?

Daily: Avoid — known endocrine disruptor risk. Weekly: Limit exposure to minimize bioaccumulation. Monthly: Generally tolerated.

What products contain diazolidinyl urea?

diazolidinyl urea is commonly found in cosmetic products. Use the Zeral app to scan any product and instantly see if it contains diazolidinyl urea.

Related Ingredients

Other Cosmetic ingredients you should know about

arachidyl alcoholMildzinc pcaModeratecycloastragenolMildpotassium alumModeratealoe barbadensis leaf extractModeratecocamidopropylamine oxideMild
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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.