When fasting can you still build muscle if you don't consume protein after being active?

I have a very active job and after I'm done I typically have a protein shake or bar, it's not much of a problem when fasting except for when I work long shift days (upwards of 16 hours). So on those long work days, I can't have my added protein after I'm done due to my fasting schedule. I'm wondering if that's okay as long as I get enough protein throughout the day? via /r/intermittentfasting https://ift.tt/x2TwsDk https://ift.tt/A2tCEev