David has 28g of protein and only 150 calories. This is 75% CFP (CFP = Calories from Protein / Total Calories). The most protein-dense bar in existence. A diversity of protein sources comes together for a perfect 1.0 protein digestibility-corrected amino acid score (PDCAAS), meaning this protein is the best amino acid profile for both muscle building and optimal bodily functioning (including skin, hair, and nail health).