Is taking expired multivitamins harmful? If not, is there any value left in them?
I don’t know specifically about vitimans, but we don’t use expired drugs on the ambulance for a reasion. Studies are done to see how much of the drug slowly degrades over time. When it is believed that the drug is no longer strong enough to produce the desired effect, or it may produce some other non-desired effect, it is said to have expired.
(insert here disclaimer about using expired drugs and the possible dangers. In no way am I recommending the use there of)
It is also well known that expired drugs generally work just fine, and that the expiration date is a very conservative estimate. If they are expired by only a few months to a year, you’re likely okay. Any more than that, who knows