So is purified water, unless you want to roleplay as a cook. Maybe it's just my luck, but I have had no problems getting enough meat and stimpaks to keep me going, and I have just been stockpiling food and water in my workshops. It feels like the game has everything in place for such a feature, perhaps it could be patched in? I'm level 15 and have 60 stimpaks, 20 bottles of purified water, and a huge storeroom filled with all sorts of junk food and canned goodies to last a few years.