How Fast Does Opened Protein Powder Lose Potency?

While you may have heard that protein powder can lose its potency after it's opened, that is not true. Protein powder is just as effective after you open it as it was when you purchased it. However, protein powder may spoil if it is not stored properly or used before the expiration date.

Protein powder (Image: ogichobanov/iStock/Getty Images)

Expiration

Protein powder is designed to last, with many brands staying fresh for up to two years past the manufacturing date. Any protein powder you buy will be labeled with an expiration or best if used by date. Using your protein powder after its expiration date is akin to drinking milk after it has expired. If your powder has expired, it is best to throw it away.

Storage

Most protein powders are made from animal by-products, such as eggs and dairy. Because these ingredients are processed and dried they do not have to be refrigerated but they do need to be stored properly. The best place to store your protein powder is in a cool, dry place, such as a cupboard or pantry.

Considerations

Some people like to mix their protein shakes ahead of time. Doing this will not effect the potency of the powder, but it will cause it to spoil faster. If you pre-mix your protein shakes, you must keep them refrigerated until you're ready to drink them. Never mix more than a day's worth of shakes ahead of time because they won't remain fresh.

Warning

Many protein powders have added vitamins and minerals that may lose their potency once the powder has expired. This can be a problem if you're relying on the powder for your daily needs. However, since you shouldn't be using any protein powder that has expired, this should be a moot point.

REFERENCES & RESOURCES
Load comments
PARTNER & LICENSEE OF THE LIVESTRONG FOUNDATION

Copyright © 2019 Leaf Group Ltd. Use of this web site constitutes acceptance of the LIVESTRONG.COM Terms of Use , Privacy Policy and Copyright Policy . The material appearing on LIVESTRONG.COM is for educational use only. It should not be used as a substitute for professional medical advice, diagnosis or treatment. LIVESTRONG is a registered trademark of the LIVESTRONG Foundation. The LIVESTRONG Foundation and LIVESTRONG.COM do not endorse any of the products or services that are advertised on the web site. Moreover, we do not select every advertiser or advertisement that appears on the web site-many of the advertisements are served by third party advertising companies.