IS IT SAFE TO USE EXPIRED PROTEIN POWDER? We all have contemplated it. But is expired protein powder

Are you worried about your bowels or your biceps?

Protein powders don’t spoil the way meat or dairy does, because a dry environment makes it nearly impossible for microbes to grow, So unless you’re storing your containers of protein in a warm, humid place (like the bathroom or your gym locker), you’re fine on that front.

As for the muscle-building magic of protein powder, it does diminish after the best before date has passed. You can blame a chemical reaction called Maillard browning: In layman's terms, the protein reacts with sugar left over from when the whey was extracted from milk, resulting in a gradual breakdown of the amino acid lysine.

If you lose lysine, then the powder will not be as complete of a protein.

Only a day or two past the expiration date? Put a bit of it on your tongue, another telltale sign of Maillard browning is a fade in flavor. If you taste cardboard, toss it!

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