Meat (brōsin). Originally the act of eating (Rom 14:17) from bibrōskō, but soon and commonly as that which is eaten like brōma once in John (Joh 4:34). So here and Joh 6:27, Joh 6:55. Cf. vernacular English “good eating,” “good eats.”
I ... ye (egō ... humeis). Emphatic contrast. Spiritual food Jesus had.