Essential

People’s likelihood of being vegetarian seems to be influenced by several genetic variants, and two of the three most important genes found so far appear to be involved in fat metabolism. This hints that some people find it easier to give up meat because they naturally produce certain fat molecules, says Nabeel Yaseen at NorthwesternUniversity in Chicago. “Maybe there’s some fat that’s essential for some people to have in their diet, but not for others,” he says.
–New Scientist