Whey and casein are major proteins found in milk. They are known as ‘complete proteins’ as they contain all of the essential amino acids. As your body cannot produce them, they need to come from your diet.
These amino acids are used in various ways by the body. For example, they regulate the mood and repair muscles.
Both proteins also contain a higher level of one particular amino acid that speeds up muscle recovery after damage. Supplements based on whey and casein proteins are, therefore, not just useful for athletes, but also those who may be suffering from muscle wasting disorders.