I honestly don't know and I can't find the answer anywhere on the Internet.
This is kinda important information for me as I primarily play as Vampires and I'm needing this info to determine if I need to add a fitness routine for my Sims.
And for thoroughness' sake, I am taking about more than just feeding off a Sim's plasma directly. I also want to know if Plasma Fruit, the Mixology drinks and the Plasma Packs also contain calories.
For anyone who can give me the answer, you have my thanks in advance.