Taken from our FAQ:
When stored in a cool, dry place Jake products will have a shelf life of approximately 1 year from their manufacturing date.
All products are marked with either an expiration date (EXP month/year), or manufacturing date (MFG month/year).
Prepared Jake must be kept refrigerated and consumed within 48 hours.
Opened packages of Jake must be consumed within 72 hours.
From my personal experience, I'd recommend having yours within 24 hours, preferably less.