Egg white protein is commonly used in bodybuilding due to its high biological value and complete amino acid profile, which includes all essential amino acids necessary for muscle repair and growth. Scientific studies support the use of egg white protein as an effective protein source for athletes and those engaged in resistance training. Research has demonstrated that the protein quality of egg whites is comparable to that of other high-quality protein sources such as whey and casein. For instance, the Protein Digestibility Corrected Amino Acid Score (PDCAAS) for egg white protein is 1.0, reflecting excellent digestibility and amino acid content.

Several studies have shown that consuming sufficient protein, including from egg whites, post-exercise can stimulate muscle protein synthesis and support hypertrophy (muscle growth). Egg white protein is also low in fat and carbohydrates, making it an attractive option for those aiming to increase protein intake without excess calories. While there are fewer direct clinical trials focusing solely on egg white protein compared to whey, the broader literature on protein supplementation in exercise and the known nutritional profile of egg whites provide a strong scientific rationale for their use in bodybuilding contexts.

In summary, the use of egg white protein for supporting bodybuilding is scientifically validated, and its efficacy is supported by nutritional science and sports nutrition research.