So, how long does protein powder last once opened? Unfortunately protein powder does eventually expire, but it does last a long time.

We would not recommend using protein powder after it's expiration date, as protein efficiency is compromised after this date.

Yes, whey protein powder does lose its protein efficiency and expire, but it lasts a good long while when stored correctly.

In short, protein powder should be considered expired when the manufacturers expiry date is exceeded.

Yes, all protein powder can expire and spoil, but they do last a good long time first.

All protein powder loses its efficiency and can spoil over time, but in general egg protein powder lasts for a long time.

While rice protein powder does last a very long time, it does lose its protein efficiency in time.

Yes all protein powders expire, but vegan protein powders can last sometimes up to two years.

All protein powders degrade over time and beef protein powder is no different.

Whey protein powder lasts a good long time, possibly as long as a couple of years, but it should not be used once the manufacturers expiry date is exceeded.