Replacing a high-carbohydrate or high-saturated fat snack with a handful of nuts is also a helpful change, said Teresa Fung, a nutrition researcher at Simmons College in Boston who also wasn't on the study team.All of these steps are making, at the end of the day, a big difference, Martinez-Gonzalez said.Fung pointed out many people in the new trial were already on medications, such as statins a