Is it safe to store herbs and spices in plastic containers?
Not ideal. Essential oils in dry spices leach plasticizers out of plastic jars.
What's actually in it
Dried herbs and spices contain essential oils, which are great natural solvents. They slowly pull plasticizers and microplastic particles out of plastic containers. The problem is worse when the plastic is warm, so spice jars sitting on a rack near the stove get the fastest migration.
The dose per meal is tiny, but daily cooking multiplies it.
What the research says
A 2025 study in J Hazard Mater measured phthalate intake across common foods and found plastic contact added measurably. A 2025 study showed plastic particle release scales with temperature.
Transfer spices into small glass jars with metal lids when you buy them. Store away from the stove and direct sunlight.
The research at a glance
| Study | Journal | Year |
|---|---|---|
| Plastic additives in the diet. | J Hazard Mater | 2025 |
| Release of Nanoplastics from Polypropylene Food Containers. | J Agric Food Chem | 2025 |
What to use instead
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