@crazy4life "Doctor" Gundry is widely recognized for practicing pseudoscience and operating scams. Typically journal publications have coauthors. In this instance it appears that what you linked to is a strange single author abstract. Perhaps there will be an actual publication in the future.
Looking at the abstract further, this abstract was published as part of a conference presentation on this topic.
The most telling point in the abstract may be the misspelling of the unusual PULS test as PLUS. Interestingly the
https://pulstest.com/publications website for the test does not list any pulbicatications to support it use.
If you are interested in knowing more about "Doctor" Grundy a simple google search for his name will find multiple source disputing his false claims.
His BBB complaints are interesting as well.
Gundry MD | Complaints | Better Business Bureau® Profile
My intention is not to attack you but I do hope that you will invest a little time in validating what you choose to believe. This is very early research if it should be considered research at all.