Fewer calories and less fat: Compared to its traditional counterparts, PB2 has 90% less fat and 70% fewer calories, all while still retaining the delicious peanut butter taste that we know and love. It’s protein-packed: Like its traditional counterparts, PB2 packs in the protein per serving. Depending on which variety of PB2 you’re using, you’ll find 4 to 6 grams of protein per 13-gram serving. Also, it’s easy to replace the protein powder in your morning smoothie with PB2, due to the similarity in the powder consistency.