Next time you're asked if you'd like fries with that, don't be surprised if one of the options is 'six'.
That's the maximum number anyone should eat in a single sitting, a Harvard nutrition professor has claimed.
Eric Rimm told the New York Times potatoes are "starch bombs" made only worse by removing their nutrient-filled skin and frying them in oil.
He's urging people to give up the fries and opt for a salad instead. But if it's fries you want, Dr Rimm says moderation is key.
"There aren't a lot of people who are sending back three-quarters of an order of French fries," Dr Rimm told the paper. "I think it would be nice if your meal came with a side salad and six French fries."
Might be time to cut down on the chips!