Expiration & Storage Tips
When does xanthan gum expire?
Xanthan gum's shelf life is quite impressive. Unopened, it can last indefinitely especially if it is stored in a cool, dry place. Its quality doesn't typically diminish over time, even years after the best-by date printed on the package. However, once opened, it can last up to three years. Pay attention to changes in texture or color, as they may hint at its expiration.
How do you tell if xanthan gum is bad?
Since xanthan gum is so shelf-stable, determining spoilage isn't usually a concern. However, if you see that your xanthan gum has changed color, has developed an off smell or the texture appears grainy or clumped, then these changes could be signs of spoilage. Also, if it has been exposed to moisture during storage, spoilage is likely.
Tips for storing xanthan gum to extend shelf life
• Store the xanthan gum in an airtight container.
• Keep it in a cool, dry place away from direct sunlight.
• If you live in a humid area or just want to be extra careful, you can add a packet of food-grade desiccant inside the container to absorb any excess moisture.
• Note that while you can freeze xanthan gum, there is typically no need to do so as it is incredibly shelf-stable.