Im agnostic, I dont beleive anything in the Bible is provable and that much of it is demonstrably wrong.
It appears that some catholics still beleive that the wafer and wine is actually physically transformed into Platelets, Nuetrophills and Plasma, muscle tissue and bones.
That is provably incorrect, simply by analysing the contents of the mouth.
These days, as transubstantiation becomes harder and harder to swallow in a rational society, a lot of catholics simply use “Blood and Body” as a metaphor. But this is a recent development.
The original poster asked the members to prove transubstatiation and he will convert. The replies have been scriptually based. Noone can prove to him it exists, and yet, it is provable with a simple laboratry test to be 100% false.
Transubstantiation is one of those areas that needs to be “Let slide” like purgotary or Hell or Noah, in order for catholisism to not collapse under a welter of logic and fact.