After some more testing, I determined that you can indeed run, sprint, jump normally after you exited the portal, and still consume the food item, as long as you don't change into another item on your hotbar, it will be auto-consumed once the normal time for the animation to finish has passed, like the inventory re-loads in half life.
Breno Mundim Veloso Level
After some more testing, I determined that you can indeed run, sprint, jump normally after you exited the portal, and still consume the food item, as long as you don't change into another item on your hotbar, it will be auto-consumed once the normal time for the animation to finish has passed, like the inventory re-loads in half life.