Before you start stressing about having to cancel burrito night, we'll cut to the chase: not all refried beans are bad, but some of the mass-produced mainstream brands definitely are, especially if they come in a can. For example, Old El Paso's refried beans contain hydrogenated lard, which is basically a double whammy of trans fats and saturated fat. Your heart will not be very happy about this artery clogging power couple.
When you purchase refried beans, you should always choose the vegetarian option. We personally think that canned beans should all be vegetarian by default, but it's another case of always having to check the label. Another thing to look out for is sodium content. So many canned goods are full of salt, so always go for something that isn't going to give you heart problems in the future.