Protein

My doc says the"whey" kind is best.

I used (and still do) the IDS New Whey liquid protein supplement "bullets" which are very easy to do (25 Gram and 42 gram sizes).  They aren't cheap - about $3.50 per shot - but they are easy to do and very transportable.

I am down to just a few shakes a week, but my standard method is EAS vanilla (good quality, but Sam's Club cheap) mixed in cold coffee (brewed in batches, the flavor keeps well in sealed containers in the fridge).  With good coffee plus the occasional splash of sugar-free hazelnut syrup (also Sam's Club), the powder serves as both creamer and sweetener and tastes pretty-much Starbucks quality to me. ETA: I'd wait a couple months for good healing before adding coffee, which might irritate.