What Can I Eat and Replenish in the Wasteland?

He Yuan traveled through time and came to a post-war wasteland world. This world is divided by warlords, with constant natural disasters and rampant monsters. He Yuan, who had just gotten up from the hospital bed, saw the metal ball in front of him emitting a faint light, so he took a sip. Soon, I was lying on the bed again. He Chao couldn't help but be startled when he saw his son swallowing the metal alive. He hurried up to induce vomiting, thinking that my son would not go crazy after getting sick, right? Why are you still eating metal alive? But he didn't know that He Yuan had already scolded his talent in his heart, "Isn't it about eating what you eat to make up for it? Why do I eat like this again and again?"