Dear god this stuff is awesome. 45 calories per serving, 4 grams of protein, 1 gram of fat. Tastes awesome. It's peanut butter in powder form without the oil. You add one tbsp of water per every 2 tbsp of PB2. Mix into a peanut butter like paste and enjoy. Normal peanut butter is 190-250 calories and 11-15 grams of fat per serving. Is it just like peanut butter? No, but it is damn good.