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Suck on That, Meat Eaters!

Lean steak is low in fat and cholesterol and high in protein -- qualities normally considered healthy. But eating a lot of it can still cause heart disease. Researchers have now laid the blame on bacteria in the human gut that convert a common nutrient found in beef into a compound that may speed up the build-up of plaques in the arteries.
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Tests showed that consuming l-carnitine [found in red meat and dairy products] increased blood levels of trimethylamine-N-oxide (TMAO), a compound that, evidence suggests, can alter the metabolism of cholesterol and slow the removal of cholesterol that accumulates on arteries' walls.

But even when they took l-carnitine supplements, vegans and vegetarians made far less TMAO than meat eaters. Fecal studies showed that meat eaters and non-meat eaters also had very different types of bacteria in their guts. Hazen says that a regular diet of meat probably encourages the growth of bacteria that can turn l-carnitine into TMAO.

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Meat - delicious, but deadly...

By min | April 15, 2013, 12:08 PM | Science