It is believed to reduce the amount of trimethylamine (TMA) in the gut, which has been linked to atherosclerosis. Dr. Krzycki's lab found evidence that E. Limosum may prevent the production of TMA chemicals in our gut. E. limosum produces an enzyme that removes a chemical group called methyl from L-carnitine. This, in turn, prevents other bacteria in the gut from converting the nutrient into TMA, according to the Medical News Today article.
See full article at https://www.jbc.org/content/early/2020/06/22/jbc.RA120.012934.short; and https://www.medicalnewstoday.com/amp/articles/gut-bug-may-help-prevent-heart-disease-and-promote-longevity