I'm interested to know about that, too. The liquids I bought from cignot actually say on the labels that it can be put in the fridge for extended life, and that expiration is 2 years? That seems like an awfully long time.
When I read that I actually got worried about degradation from the heat during shipping. Bottles were very warm, it is hot as hades here and they'd sat in the mailbox all afternoon. Now I'm wondering about the cold, I'm new to this and didn't bother to read up on storage....I'd just assumed from those labels that fridge was best and have been keeping mine in a lock box in there.