Douse your sushi in soy sauce, and the next thing you know you’re feeling stuffed, bloated and uncomfortable. That’s all thanks to its astronomically high levels of sodium. “Sodium holds on to water, which can translate to water retention and weight gain,” says Gilbert. “Plus, it’s really bad for blood pressure.” Ask for low-sodium soy sauce instead, and use just a dash. As for other high-sodium sauces—we’re looking at you, sweet and sour—Gilbert says to ask for it on the side in order to better control the amount you consume.