The flesh and the blood could simply be something the priest bought, dug up, whatever and used preservatives of some kind on. I don't know the technical aspects of it, but I'd bet that even in the 7th century they knew ways to do this.
I would like to believe it was real, but I don't. This just looks phony, to me. It would be nice if the church would open it up to new rounds of tests and let a group of non-Catholic, non-Italian scientists come in and do the testing.
Teams of scientists from the University of Sienna and UNESCO did independent tests,1300 years after the miracle, which to this day is on public display.
Those scientists do not work for the Catholic Church.
I have seen the Eucharistic Miracle at Lanciano.
It is housed in a beautiful, see-through glass monstrance and chalice for all the world to see.
The evidence is there, and the scientists have verified it.
The only ingredient left is faith and a desire to accept what God has chosen to reveal.