Rice protein powder lasts extremely well and manufacturers often provide expiry dates up to 2 years.
Pea protein powder can last a very long time, possibly up to 2 years from manufacture if stored correctly.
Casein protein powder can last a very long time, possibly up to a couple of years. However, referrer to the manufacturers expiry date for best results.
All protein powders degrade over time, but beef protein powder will last for a good long while if stored correctly in air-tight containers in a cool dark location.
Egg protein powder like most protein powders, lasts a good long while if stored in an air-tight container in a cool dark location.
Plant protein powders can cast for an extremely long time, perhaps even as long as a couple of years.
Soy protein powder is designed to last, and last it does! In some cases soy protein powder can last for up to two years, if stored correctly.