Pro Domino, you are saying that for decades people who have allowed the Host to melt on their tongue, and believing that they had received Holy Communion, have really not received Holy Communion.
“
Then you have to read a little on amylase, which is the enzyme present in saliva, which turns starches into simpler sugars, effectively destroying bread. This in relation to the Host means that it will lose its form of bread, therefore also Real Presence.”
The Consecration turns the Host into the Body and Blood of Jesus Christ - it is no longer ordinary bread that would go through the chemical change you are suggesting.
The substance of the bread is the Body and Blood of Jesus Christ but the accidents of the bread remain and will go through the chemical change he mentions. That said, does it matter how far into our body Jesus gets before that occurs?
I believe you are just trying to cause anxiety and worry so I will pray for you and hope that you don’t succeed in your mission.