"[Soy sauce] is probably the one most people think is healthy," says Jalali. But it is extremely high in sodium. One tablespoon has around 900 mg of sodium (about 37 percent of your daily allowance). Soy sauce can also be contaminated with gluten (for those with celiac) or other additives like MSG, says Jalali. "So you want to make sure that you are buying good quality soy sauce."