Meat (βρωσιν). Originally the act of eating (Romans 14:17) from βιβρωσκω, but soon and commonly as that which is eaten like βρωμα once in John (verse John 4:34). So here and John 6:27; John 6:55. Cf. vernacular English "good eating," "good eats."

I ... ye (εγω ... υμεις). Emphatic contrast. Spiritual food Jesus had.