Is it safe to store herbs and spices in plastic containers?
Use caution for long-term spice storage in plastic. Glass jars are the cleaner everyday storage choice.
What's actually in it
Dried herbs and spices contain natural oils and strong aroma compounds. They often sit in the same jar for months.
The biggest concern is not one plastic spice jar. It is long storage near heat, sunlight, or a stove, plus repeated use from the same container.
What the research says
A 2025 Journal of Hazardous Materials total diet study found plasticizers in 85% of analyzed food samples. It also found packaging type affected some plasticizer levels.
A 2025 Journal of Agricultural and Food Chemistry study found polypropylene food storage containers released nanoplastics and microplastics into water. The release was higher after 90 C water contact than room-temperature water contact.
These studies did not test spice jars directly. They support a practical storage habit: keep long-stored foods away from plastic when glass is easy.
Move frequently used herbs and spices into small glass jars. Keep them away from the stove. Replace plastic jars that are cloudy, scratched, sticky, or strongly scented.
The research at a glance
| Study | Journal | Year |
|---|---|---|
| Plastic additives in the diet: Occurrence and dietary exposure in different population groups. | J Hazard Mater | 2025 |
| Release of Nanoplastics from Polypropylene Food Containers into Hot and Cold Water. | J Agric Food Chem | 2025 |
What to use instead
For spices and dried herbs, use glass jars instead of long-term plastic containers near the stove.
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