I think you are ok (at least for some time) if it isn't opened, at least that is how it was explained to me but as for how long a product stays fresh in unopened state maybe someone else here can chime in?
It will be quarts for me at this time till i know which
solution i like best, so far ordered quarts of
Mystic (rep said it was aprox 10% dha)
Focus 10%
Aviva 8.5%
Hoping out of those 3 one will stand out as a fav, if not back to finding more to try i guess till one clicks for me.
Bill