Both polyphenols and probiotics are great for gut health for different reasons. Polyphenols feed existing bacteria, while probiotics introduce new bacteria into the gut.

We chose the best dog foods with guidance from veterinarians. Our top picks include dry, wet, and fresh food for adults, seniors, and large breeds.

Most people are well aware that fiber is a nutrient we want to eat enough of. Fewer know that there are two distinct types: soluble fiber and insoluble fiber. Both play different—but equally ...