Like Brian, I use blended foods. I live in CA and go to England several times a year as well as Spain. I do take some cartons on commercial formula. And I do buy things similar to "Ensure" in Europe. And I use the Ensure as a base for blended food. I don't always eat as well as I like, but if I am gone only for a couple of weeks I think it is OK. I don't always get access to a blender, so often I just add proteins powder and olive oil to my blend. get lots of cals that way. Not as easy to get the right stuff in the UK, Spain and France a bit better. One think, very difficult to get was syringes. On my last trip i was down to one!!!!