Key points from article :
Two genes involved in fat metabolism have been linked with vegetarian diets.
Three gene variants, including NPC1 and RMC1, are more common in vegetarians, associated with cholesterol metabolism.
The third gene, called RIOK3, has various functions, including affecting the immune system.
It isn't known exactly how these genes could relate to vegetarianism, but one possibility is that some people are more able to synthesise certain lipid molecules that are present in meat.
People who try vegetarianism but give up may be doing so because the body becomes deficient in these postulated essential lipids.
Research conducted at Northwestern University using UK Biobank data, published in PLOS ONE.
