Products
Whey protein is available in retail and specialty stores from various suppliers as powder without flavor or with different flavors. The German term is actually whey protein or whey protein. However, the English term has prevailed and is more common.
Structure and properties
“Whey protein” is the protein contained in whey. Whey is produced during the manufacture of cheese. It is the yellowish to green liquid pressed from the curdled milk. The main component of the products is the proteins with all essential amino acids: beta-lactoglobulin, alpha-lactalbumin, serum albumin, lactoferrin, immunoglobulins, glycomacropeptide and enzymes. Whey protein contains high levels of branched-chain amino acids (BCAAs), i.e. leucine, isoleucine and valine. In addition, products may contain lower proportions of carbohydrates, fats, minerals and vitamins.
Effects
Whey protein provides muscles with the amino acids needed for building and maintenance and increases protein synthesis. It is rapidly absorbed in the digestive tract – this in contrast to casein, the other milk protein. Whey protein is also believed to have various health-promoting properties. For example, it contains cysteine, which is important for the synthesis of the antioxidant glutathione. Its clinical efficacy is controversial. According to a 2010 EFSA report, there is insufficient scientific evidence to support the claimed indications for use.
Indications for use (selection)
- For building and maintaining muscle, for example in bodybuilding and sports.
- As a dietary supplement for adequate protein intake, for example, in case of lack of appetite, cancer, decubitus, convalescence or AIDS.
- For the production of processed foods such as infant milk.
- For overweight and obesity.
Dosage
According to the instructions for use. Whey protein can be taken half an hour before or after exercise. The powder is usually prepared with water or milk. It can also be used to enrich cold or hot dishes.
Contraindications
Whey protein should not be taken if you have a hypersensitivity. A complete list of precautions is not available.
Interactions
Protein may inhibit the absorption of levodopa. Other interactions are possible. Therefore, products should not usually be taken at the same time as other medications.
Adverse effects
Gastrointestinal symptoms such as diarrhea, nausea, bloating, and abdominal pain may occur when high doses are taken.
