OT: Does baby powder expire?

I can not imagine a baby without using baby powder. It is an essential thing for them. Does baby powder expire, then yes, it does. Because nowadays, some most baby powders consist of cornstarch, which has a short period or life-like, 18 months once you opened. Unopened baby powders are safe, they not expired, but it all depends on your storage process. Ypu can read the details here