In most cases, it will be edible (not spoiled) for a year or even more. You can easily find stories of people who used protein powder that's old. The powder was two or three years after its date and the shakes they've made turned out just fine.

CAN expired protein powder hurt you?

Yes, out of date protein powder is safe to use. Since protein powder is such a dry substance there is very little risk of bacterial growth. This is applicable to both whey protein and casein protein. ... If the protein has been opened its recommended you consume it six to eight months after the expiry date.

Does protein powder actually expire?

Based on the available research, whey protein powder has a shelf life of 9–19 months when stored under normal conditions. Most protein powders contain additives that extend the shelf life for up to 2 years.