- Question: Are unopened Obagi products still effective after date of expiration and if so how long? I have some that are dated 5/10 and wondered if I could use them. It is #1 thru 6. Thanks so much. Jane
We recommend checking directly with the manufacturer to get exact expiration dates. Some products may expire even when unopened and some dates are extended if they are unopened. Be sure to check with Obagi directly.