Most zinc supplements have a shelf life of about 2 to 3 years from the date of manufacture when stored correctly. After the expiration date, the efficacy may diminish but. Depending on your vitamins and supplements and what form they're in, they lose potency at different rates.
Depending on your vitamins and supplements and what form they're in, they lose potency at different rates. Tablets and capsules tend to stay potent for longer than something.