Alright, so last night, for the heck of it (and testing), I held some refined uranium until my player died. At this point, I had one heart. This got me into an infinite loop of spawn, take damage, die due to the one heart. I had to go into creative mode to be able to spawn and get rid of the refined uranium. The problem now is that I am stuck at one heart and no idea how to get back to normal health. I can't find anyone on any wiki and I searched this forum with no result.
So, how do I return to normal health?