Originally Posted by jim230027 Originally Posted by Java Man No. don't toss it. I keep my powders in the fridge personally but I've read this isn't necessary. Doesn't hurt either! Once it's reconstituted it lasts at least 30 days according to the literature. I've never kept any reconstituted longer than 30 days because I use it all, but have read it lasts 60d of kept refrigerated. It does lose potency over time until eventually it's inert. I wouldn't worry about it if less than 45 days. Keep it refrigerated always. Even of it's not reconstituted ...