The weight of your waiter can impact your decision to order dessert, a new study says

Be careful who you surround yourself with.

That's the advice, anyway, from a recent study published by the academic journal Environment and Behavior on how we order food in restaurants.

The takeaway? The size of your waiter - yes, the person who's taking your order - can seriously impact the food choices you make.

In the study, researchers observed 497 interactions between diners and servers in 60 different restaurants.

The results were stark: the bigger the waiter, the more likely the diner would heavy up on calories.

People were four times more likely to order dessert and almost 20% more likely to ask for alcoholic beverages when served by waiters with a high body mass index (BMI), which correlates weight with percentage of body fat. The researchers defined a person as heavy if they had a BMI of at least 25.

How do waiters affect us? The researchers suggest that a "heavy person sets a social norm." As a result, we feel comfortable consuming more calories since the environment's "norm" is already tipped towards the heavier end of the scale.

We already know that there are a lot of factors that play into our food choices: our mood, the lighting, how a meal is described on the menu, who we're dining with. This is just one more signal to pay attention to before you decide you really need that slice of post-dinner pie.

So next time you head to a restaurant, stick to your healthy eating resolution and consider this tip from the study: do your research in advance, and decide on your order before you even walk in the door. That way, no matter who's serving you, you're still in control.