Which animal-based protein source has the highest bioavailability in the human body?

Whey protein isolate is recognized for having the highest bioavailability among animal-based protein sources. Bioavailability refers to the proportion of a nutrient that is absorbed and utilized by the body. Whey protein is particularly valued for its quick digestion and absorption rate, making it extremely efficient for muscle protein synthesis. This is largely due to its high content of essential amino acids, particularly leucine, which plays a crucial role in activating the pathways necessary for muscle growth.

In contrast, while eggs are also highly bioavailable and contain a complete amino acid profile, they typically have a slightly lower biological value compared to whey protein. Beef and chicken provide significant amounts of protein and amino acids, but they usually require more time for digestion and absorption, resulting in a lower bioavailability compared to whey protein isolate. Thus, when considering the efficiency and effectiveness of protein absorption in the human body, whey protein isolate stands out as the superior choice.