Bran is similar in nutrient content to oats. It has one-half the density of whole oats, around one-fourth the density of corn or wheat and about four times the phosphorous content of most grains. It’s relatively high in B vitamins such as niacin, thiamin and riboflavin.
Bran is a mild laxative and easy to digest. It’s also easier to chew for older horses with compromised teeth.