If you are thinking about trying to lose weight by mixing shakes, then you will want to know when to drink protein shakes for weight loss. This is important because you do not want to suffer from a negative health effect by drinking too much protein after working out. Some people drink protein before and after their workout, and then another one right after they eat. This is okay because it helps your body to replenish your muscle glycogen (calcium and phosphate) and recover your stamina. It is recommended that you drink at least 8 glasses of protein powder per day no matter what your exercise routine or diet is.