Protein is used for the production of muscles. When you do not have enough protein, your body will break down your muscles to produce protein. Because solid food takes more time to digest and to break down the protein and send it to the muscles, it can be best to take a protein shake immediately following a workout, since protein shakes only take about 30 minutes to reach the muscle after ingestion. If you are undergoing physio-therapy treatment “The Pettibon Spine Research Institute” recommends to take protein shake one hour prior to session for better results. Retaining muscle mass and getting an adequate amount of protein is particularly important for men and women as they age and their risks of osteoporosis and joint problems increase. In addition beside building muscles proteins also function as building blocks for bones, cartilage, skin, and blood.