Does protein powder go bad? It may have been sitting on the shelf since last New Years resolution last year, but before you open the jug you must check the expiration date. The date of expiration is a good rule of thumb in determining if the protein powder has taken a turn for the worse. While protein powder can go bad, it has an extremely long shelf life. A year or even 18 months may be the maximum amount of time before throwing it out, but if you are willing to risk it, you may even be able to utilize the protein powder beyond that.
Another key to determining if it has gone bad or not is to smell it and taste it. Open the jar and smell the contents. If it smells sour or like a bad milk product, then it has probably gone bad. If the protein powder still smells fresh then it is probably good to use. You can also taste a little on your tongue and check to see if it still has a good flavor. If in question, it is best to discard the protein powder and pick up some new.
If the protein powder has been sealed, it is probably fine past the expiration date, but remember that protein powder does go bad so pay attention to the cues.
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