The best lemon lime soda is bright and refreshing and, ideally, tastes like lemon and lime in equal measure. It should have a robust fizz that’s as zesty as its flavor. Basically, even though it ...

My 70-year-old wife drinks several cans daily of diet lemon-lime soda that contains sucralose. She also tends to have fairly loose, even runny bowel movements.

My 70-year-old wife drinks several cans daily of diet lemon-lime soda that contains sucralose. She also tends to have fairly loose, even runny bowel movements.

My 70-year-old wife drinks several cans daily of diet lemon-lime soda that contains sucralose. She also tends to have fairly loose, even runny bowel movements.

My 70-year-old wife drinks several cans daily of diet lemon-lime soda that contains sucralose. She also tends to have fairly loose, even runny bowel movements.

DEAR DR. ROACH: In a recent column that touched on taking laxatives daily, you mentioned a sugar called lactulose that you recommend for constipation. I’m wondering if other sugars have the same ...