Raisin bran muffins contain healthy ingredients such as fiber, protein and dietary minerals. When eaten in excessive amounts, however, a bran muffin can be unhealthy due to its high calorie and sodium content.
Bran muffins that are sold in restaurants or retail stores are often oversized and contain 350 calories on average. Their oil or butter content can also give them a high saturated fat count. Certain brands of bran muffin also contain excessive amounts of sugar and sodium, both of which can cause health issues over time. Homemade bran muffins are available in smaller portions and contain fewer harmful ingredients.