Once again - you're confusion lies in the fact that you are a cherry-picker - NOT a serious Scripture student.
The passage from 1 Cor. corresponds with BOTH the Bread of Life discourse in John 6 - AND the Last supper narratives.
LEARN how to properly divide the Word of God . . .
Well, As a supposed avid bible studier as you claim to be, You too should be a cherry-picker. and not just assume things are what people tell you they are. but study to show yourself approved, rightly dividing the word of God.
So lets do this and not just assume what we were taught by our leaders are correct.
1 John. The flesh and blood
1. Jesus said to work for Not for food which perishes (like manna) but food which will endure forever which he (the son of man) will give us (not some priest)
2. He said this food, whoever eats will never hunger, never thirst, Live forever, Never die, HAS eternal life, WILL be risen by him (not delivered)
3. He said whoever eats and drinks are given to God, and will NEVER be lost. That is is in fact the will of God that whoever BELIEVES in the one who was sent, has all these things
4. It is a spiritual food. Which as Jesus proclaimed and Peter confirmed are the words of eternal life. Remembering that it is the holy spirit who gives life. the flesh (physical food like manna) is nothing.
5. It is compared to manna, A food. which the children of Israel ate OFTEN and a sample of which was placed into the Ark of the covenant as a witness against Israel. and to remind them of the sins of the fathers.
6. Jesus said who ate it and who will nto eat it. He said the ones who did not eat are those who do not believe, while the ones who did eat. Like peter. were those who believed.
1 Cor
1. Unlike the food in John 6, which Jesus told us to work for it, and would be given by him personally (will be given to you by the son of man). Is given by other Christians when the group would meet
2. Did not promise that the person who ate would never hunger or thirst, live forever, never die, They have eternal life, they will be risen by him
3. It is physical food. Used to represent the spiritual act of Jesus and giving his body and blood for our sins on the cross
4. Unlike the food of John 6, meant to make us alive and KEEP us alive We are told to do this "often in remembrance of me" Which means not only does this food DIE (lose its life giving properties, because it does not endure forever) We are told to eat often (like they were told to eat manna which would sustain them for only a period of time)
5. Believers and unbelievers alike have taken part in this new church tradition started in acts. In fact. We were told many would take it in sin Getting drunk and hording the food. while letting others starve because they ate all the food and did not share (it is not even represented by what most traditional churches do. it was a dinner of celebration. the eating of a meal, while breaking bread and drinking the cup (wine) with that meal. and doing it in remembrance of Christ.
So you see. If YOU would "cherry-pick" these verses like you are commanded to (study to show yourself approved) you too would see, as have so many others. that these two passages are speaking of two totally different things
1. A life sustaining empowering food which endures forever and gives the one who chews and gnaws in this food and is fed by its power (by believing and receiving what it offers. and not just tasting it ans spitting it out in unbelief)
2. A tradition, a ceremony used to remind us of what Jesus did back on Calvary. do often in remembrance of me.