In 1999, in the presence of then Cardinal Bergoglio, Dr. Ricardo Castanon, an atheist at the time, sent the fragment to New York for analysis, but did not inform the team of scientists its origin so as not to prejudice the study. One scientist, Dr. Frederic Zugibe, a cardiologist and forensic pathologist, determined that the substance was real flesh and contained human DNA, and furthermore he concluded was a piece of heart muscle.
Yet this was only the beginning of what would be a phenomenal enigma. DNA tests on the sample showed it to be that of a male, AB positive blood type. What is extraordinary about this fact is that the DNA is the exact same match as another Eucharist 'miracle' that took place in the 8th century in Lanciano, Italy confirming that both samples came from the same person.
I’ve shared about these Eucharistic miracles for a few years now. Here are some interesting videos:
There are many Eucharistic miracles...though not many Catholics know about them. It might be good to share the following books: