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.
All protein powder loses its efficiency and can spoil over time, but in general egg protein powder lasts for a long time.
All protein powders degrade over time and beef protein powder is no different.
Yes all protein powders expire, but vegan protein powders can last sometimes up to two years.