The Clif Website indicates that Shot Blocks are not gluten free. I was so disappointed to read this because this is what I used pre-diagnosis. Have you not had trouble with them making you sick?
I looked on their website and it's kind of confusing. The allergen table does not list even trace amounts of gluten as a concern, but when they answered the Gluten-free question they said they may contain gluten. I wonder if it's cause it is not a dedicated facility? I have not had any problems and I have a reaction from even small amounts.
OP--I missed the no dairy. So the frostee is out. Can you eat peanut butter? I eat peanut butter and Gluten-free pretzels after long runs.
And I saw someone mentioned Higdon. Galloway is another one you can look at. I was not a big fan of the run/walk stuff in the past, but have found it is easier on my body and helps to not feel so beat up. For my last 1/2 I did a ratio of run 5 minutes walk 1 minute. Currently since the foot is still not happy I am running 3 walking 1.