U.S. doctors online nowAsk doctors free
A 44-year-old member asked:

Is it a bad idea to take expired protein supplements (powder)?

1 doctor answer1 doctor weighed in
Dr. Bryan Levey
Pediatrics 28 years experience
Yes: Substances, whether grown in a field or created in a laboratory or factory, change over time. They can lose potency, and/or they can lose nutrient value. The expiration date is the outer edge of when the manufacturer will guarantee potency and/or nutrient value. Beyond that time, you may be taking something that will either not have the desired effect or possibly have a negative one.
Created for people with ongoing healthcare needs but benefits everyone.
Last updated Oct 1, 2012

Disclaimer:

Content on HealthTap (including answers) should not be used for medical advice, diagnosis, or treatment, and interactions on HealthTap do not create a doctor-patient relationship. Never disregard or delay professional medical advice in person because of anything on HealthTap. Call your doctor or 911 if you think you may have a medical emergency.