Is it safe to cook sous vide in plastic bags?
Based on 2 peer-reviewed studieskitchen
Verdict: Use Caution
Not great. Warm fatty food in plastic for hours is a slow extraction.
What's actually in it
Sous vide typically uses polyethylene bags at 50-90°C for one to multiple hours. The temperature is below boiling but the contact time is long. Fat in the bag pulls out more than water.
What the research says
A 2025 study documented particle release from plastic across temperatures. A 2025 study found phthalates from plastic packaging in fatty foods.
Use silicone sous vide bags (platinum-grade) or glass jars for sous vide cooking. Both handle long warm-water immersion without leaching.
The research at a glance
| Study | Journal | Year |
|---|---|---|
| Release of Nanoplastics from Polypropylene Food Containers. | J Agric Food Chem | 2025 |
| Plastic additives in the diet. | J Hazard Mater | 2025 |
What to use instead
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