Whey, which refers to the watery part that separates during the cheese-making process, is a protein that is present in milk. It contains a mixture of globular proteins such as beta-lactoglobulin, alpha-lactalbumin, and serum albumin. There's no denying the fact that whey is one of the most popular types of protein that is currently used for making protein powders and shakes. Some products might contain whey concentrate and whey isolate, while some of the protein powders might contain both. Whey protein hydrolysate is the hydrolyzed form that is easier to digest, and is used in infant formulas. WPI and WPC vary in the composition of protein and fat content. Whey isolate contains minimal fat and cholesterol, and more than 90% protein. On the other hand, the protein content of whey concentrate lies between 29% and 89%. It contains some fat and cholesterol as well. Also, WPI contains bioactive components that help reduce appetite and facilitate weight loss. Whey also contains a high concentration of Branched Chain Amino Acids (BCAAs), which are important for efficient muscle metabolism. Whey protein has an excellent amino acid profile. It is a complete protein in itself, as it contains all the essential amino acids. As a result, whey protein gives the stamina to perform intensive workouts, and helps improve muscle mass. It also helps facilitate weight loss in the following ways: ➠ Whey contains leucine, which helps in the process of protein synthesis. The process of protein synthesis helps build muscles, which in turn helps burn calories. ➠ Whey induces a feeling of satiety. It contains a peptide named glycomacropeptide. This peptide stimulates the secretion of a hormone called cholecystokinin (CCK). CCK is a gastrointestinal hormone that is released when fatty acids and amino acids are present in the small intestine. It stimulates the secretion of pancreatic enzymes. It also stimulates the process of contraction and emptying of the gallbladder, which in turn facilitates the digestion of fat. This hormone induces satiety, which is why it is also referred to as the satiety hormone. While numerous whey protein powders are available in the market, a few stand out in terms of quality, flavor, digestibility, and amino acid profile. These include: Besides the aforementioned products, other whey protein powders that have received good reviews include: ➠ Combat Powder by MusclePharm ➠ MRM 100% All Natural Whey ➠ Dymatize Elite Whey Protein Isolate ➠ Body Fortress Super Advanced Whey Isolate ➠ Muscletech Phase8 ➠ BSN Syntha-6 Whey protein not only has the highest protein digestibility corrected amino acid score (PDCAA), it is a complete protein, as it contains all the essential amino acids, and branched chain amino acids (BCAAs). Incorporating this protein in your diet is an excellent idea, but it's advisable to consult your fitness trainer or healthcare provider before you start taking whey protein. Also, do check out the nutritional information provided on the label, before you buy this product.