David Protein is a brand known for its high-protein, low-calorie protein bars, featuring 28g of protein in just 150 calories with 0g sugar, using innovative ingredients like EPG (Esterified Propoxylated Glycerol) for reduced calories, aiming for high protein density with 75% of calories from protein, founded by Peter Rahal (creator of RXBAR) and supported by figures like Peter Attia, though it’s noted for its high price, dense texture, and controversy over its ingredient sourcing and market impact.