Hmmmm......Sooooooo Jesus didn’t say to the Apostles at The Last Supper “This IS my body/blood...”?
The Old Testament is specific about why one was not to eat blood: “The life of every creature is the blood of it; therefore I have said to the people of Israel, You shall not eat the blood of any creature, for the life of every creature is its blood” (Lv 17:14, cf. Dt 12:23). The Israelites could not eat animal blood because it contained the animal’s life, but there is one Person whose life you must have in you, “ unless you eat the flesh of the Son of Man and drink his blood, you have no life in you (John 6:53).
Curious