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polystyrene

Also listed as: PS, styrofoam

High Concern

Endocrine-disrupting polymer chemical. Readily leaches from packaging materials into food, particularly when heated. Mimics natural estrogen, disrupting reproductive hormones and metabolic health.

Recommended safe frequency
dailyAvoid contact with food/beverages — known endocrine disruptor
weeklyDo not microwave or heat in this packaging material
monthlySafe for occasional consumption
Brand lens check
  • MicroplasticsFlagged
  • SugarsNot flagged
  • Seed OilsNot flagged
Body systems impacted
  • Hormones / Endocrine
  • Reproductive
  • Kidneys
Regulatory status
  • FDABanned in baby bottles and infant formula packaging
  • EFSATolerable Daily Intake (TDI) reduced by 20,000-fold due to immune safety risks

PubMed References

Primary Research

Exposure to Bisphenol A (BPA) and phthalates: reproductive and developmental toxicity profile(2022)

PubMed (PMID 30048219)→

Last reviewed: May 2026

FAQ

Is polystyrene bad for you?

Endocrine-disrupting polymer chemical. Readily leaches from packaging materials into food, particularly when heated. Mimics natural estrogen, disrupting reproductive hormones and metabolic health.

What does polystyrene do to your body?

polystyrene primarily affects: Hormones / Endocrine, Reproductive, Kidneys.

How often is it safe to consume polystyrene?

Daily: Avoid contact with food/beverages — known endocrine disruptor. Weekly: Do not microwave or heat in this packaging material. Monthly: Safe for occasional consumption.

What products contain polystyrene?

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

Related Ingredients

Other Packaging ingredients you should know about

diisodecyl phthalateHigh Concernbisphenol sHigh Concernhigh-density polyethyleneMildpolypropyleneMildmicroplasticsHigh Concernbenzyl butyl phthalateHigh Concern
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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.