What is whey protein?

Whey is one of the largest reservoirs of high-quality protein. It is formed during the cheese-making process and is a major by-product of the dairy industry. In addition to protein, raw whey also contains fat, lactose, and other substances. Raw whey is further processed to produce several different types of whey proteins: concentrates, isolates, and hydrolysates. Whey protein concentrates, in addition to being high in protein (over 70%), also contain fat and lactose. Some of them have higher immunoglobulin levels than others. Whey protein isolates contain an even higher percentage of pure protein (over 80%) with minimal fat and lactose. Whey protein hydrolysates contain protein molecules that have been broken down into peptides, making them easier to digest and absorb. Whey protein is rich in nutrients that create glutathione, an amino acid with strong antioxidant activity. This is why whey protein is recommended in the diet of all age groups, and research suggests that it may have immunomodulatory and anticancer effects. Whey protein is particularly popular among professional athletes and recreational athletes because it is rich in branched-chain amino acids (BCAAs), which are essential for normal growth and muscle mass gain. It is most often recommended for athletes for whom strength is the main performance and is taken after rest or training or in the evening before bed. It is believed that the high concentration of amino acids in the cells (created by the breakdown of proteins and absorbed into the cells) stimulates muscle protein synthesis and reduces breakdown. No adverse reactions have been reported with whey protein, but people with hypersensitivity to milk proteins may experience symptoms of an allergic reaction. If whey protein is used in larger amounts than recommended and for a longer period of time, whey protein can damage the kidneys and liver. Therefore, it is not recommended for use by people with hypersensitivity to milk proteins, as well as people with kidney and liver diseases. No adverse interactions with drugs, dietary supplements, herbs or food have been reported.