Yes, you can freeze protein powder, but it may not be the best option due to the potential for condensation to form inside the storage container and spoil the powder. When protein powder is exposed to changes in temperature and moisture, it can degrade and become clumpy, potentially altering its flavor and texture.

If you choose to freeze protein powder, it is important to take proper steps to minimize the risk of condensation. This includes storing the powder in an airtight container or resealable bag, and keeping it in the freezer until ready to use.

However, it is still recommended to store protein powder in a cool, dry place away from direct sunlight and heat sources. Keeping the container tightly sealed will also prevent exposure to moisture and air, which can cause spoilage.

It's also worth noting that some types of protein powder may be more susceptible to spoilage or changes in texture and flavor after being frozen, so it's best to consult the manufacturer's recommendations or conduct your own research before deciding whether or not to freeze your protein powder.

In conclusion, while it is possible to freeze protein powder, it may not always be the best option and careful consideration should be given to the potential for spoilage and changes in quality.