1. spawn and eat/drink until your character is bright green in the energized/hydrated department with orange in the stuffed (i'd say take 10 pumps of water and just eat anything you find, avoid eating rice/cereal since those tip your water/stomach levels and screw up your energy levels and that's important in testing this bug. we don't want to be stuffed with just water or just food since that doesn't fulfill the healing/healthy requirements)
2. (wait 20-30 mins for 'digestion' while maintaining the colors in your character screen and notice that you still haven't received either a healing or healthy status yet, which you should have by now)
3. run up to a zombie and let it hit you, moments later you'll see the healing show up, then healthy soon after
this is a little annoying since you won't know that you're regenerating correctly until you get hit for the first time. a simple test with the zombie is easy, but if the first thing you get to test on is hot lead, that's not good.