This amount is not required for the typical person working out at the gym to maintain fitness. In persons following a relatively low fat diet obtaining more than 60 grams of protein per day may require additional planning. As the name implies, protein powders contain protein. Virtually all current protein powders contain either soy protein or whey protein along with various minerals and flavoring agents. Despite the dozens of brands available most of these powders are supplied by several huge corporations involved in food processing.
Soy protein is derived from the soybean plant and a good, although incomplete, source of protein.
Soy protein products come in various concentrations and are available alone or in combination with carbohydrate and fatty acid constituents. Soy is added to many commercially prepared products ranging from baked muffins to protein bars to infant formulas. Additional amino acids can be added to soy products. Soy products are relatively inexpensive. Whey protein is obtained during the processing of milk to cheese.