It can lose its potency over time, yes. It takes a long time, though. If it's not wrapped up properly, it can start to deteriorate in a few months, but if it's wrapped up properly (like, in a sealed plastic bag inside a jam jar with the lid screwed on tight) it won't start losing its potency for at least a year (I think). If you have some that you don't plan on smoking for a long time, seal it up in a Ziploc bag, put the bag in a jam jar, and put the jar in the freezer.
No actually the longer you keep it the better it is.
vegemite expiration date
The expiration date is in Julian code... Google that to get your expiration date.
Date of Expiration was created in 2002.
By reading the expiration date on the can
Most likely the expiration date.
The duration of Expiration Date - film - is 1.57 hours.
Expiration date on slavery
Draw expiration date
On the official website for CENOMAR, there is no mention of an expiration date. When you go to get a CENOMAR, ask about the expiration date.
Obviously not, otherwise it would not have an expiration date.
Expiration Date - novel - was created in 1996.
They have an expiration date