In case you haven’t noticed, church membership is fattening.

Churches traditionally haven’t worried much about waistlines, but as nutritionist Autumn Marshall at Church of Christ-affiliated Lipscomb University in Nashville explains, most evangelical Christians don’t drink, smoke, curse or commit adultery.

So they eat.

While the Bible frequently condemns gluttony, Marshall said “it just appears to be a more acceptable vice.”

A 1998 study by a Purdue University sociologist found that church members were likelier to be overweight than others.

Broken down by religious groups, Southern Baptists were heaviest, while Jews, Muslims and Buddhists were less likely to be overweight.

So, if you see a group of skinny people discussing the Westminster Confession, you can rightly say, “They don’t look like Presbyterians to me.”