Does Metamucil go bad?

[Michael63129]

I’m pretty sure that fiber has a near-indefinite shelf life as long as it is kept dry; it isn’t like Metamucil is medicine, and even for medicine, it has been found that many drugs will still be good even years after the expiration date (there are some exceptions, like tetracycline):

A study conducted by the FDA (Food and Drug Administration) requested by the military occurred due to the fact that the military faces tossing out and replacing a large expensive pile of drugs every few years. The study found that 90% of more than 100 different prescription and non-prescription drugs were still safe and effective to use even 15 years after the date of expiration.

Of course, if it is a critical drug, I would be on the safe side and not use it once it has expired, and even for Metamucil it may develop a stale taste (if it is the powdered version).