Highest biological value of protein is seen in –
**Core Concept**
The biological value of a protein is a measure of its ability to provide essential amino acids necessary for growth, maintenance, and repair of body tissues. It is an indicator of the protein's quality, with higher values indicating a better balance of essential amino acids.
**Why the Correct Answer is Right**
The highest biological value of protein is seen in whey protein, which is a complete protein rich in essential amino acids like leucine, isoleucine, and valine. Whey protein is produced during the cheese-making process and is considered a high-quality protein due to its excellent amino acid profile. This makes it an ideal choice for muscle growth, recovery, and overall health.
**Why Each Wrong Option is Incorrect**
**Option A:** Casein protein, while a good source of protein, has a lower biological value compared to whey protein due to its slower digestion rate and lower levels of essential amino acids.
**Option B:** Soy protein is a plant-based protein that is often considered incomplete, meaning it lacks one or more essential amino acids. However, some soy proteins are fortified with these amino acids, improving their biological value.
**Option C:** Egg protein is a high-quality protein, but its biological value is lower than that of whey protein due to its lower levels of certain essential amino acids.
**Clinical Pearl / High-Yield Fact**
When choosing a protein supplement, look for whey protein as it has the highest biological value, making it an excellent choice for muscle growth and recovery.
**Correct Answer: A. Whey protein.**