The recommended daily allowance (RDA) for protein that the average person should get in their daily diet is .8 grams for every kilogram of body weight.
We need protein to maintain healthy muscles, bones, and skin. Too much protein can be damaging to our bodies though, more specifically the kidneys. Overconsumption of protein can lead to weight gain as well because the excess protein can be stored as fat.
Protein shakes are usually used by people who are very athletic. Athletes often drink protein shakes after working out in order to nourish their bodies. They also help the body to restore glycogen, which helps the muscles get ready for the next workout.
A study of 130 U.S. Marines looked at intense exercisers who supplemented their diet with 10 g of protein, 8 g of carbohydrates, and 3 g of fat. They had fewer infections, less heat exhaustion, and less muscle soreness. Some protein shakes may help with weight management, as well. But more research is needed to confirm this.
This topic is actually a controversial one. I think it is safe to say that protein shakes are great if they are used in moderation.
Our bodies need a certain amount of protein to carry out important functions like building and repairing tissue. However, consuming too much protein can have detrimental consequences to your health.
Chemically, protein is carbon, hydrogen, oxygen, and nitrogen. When your body breaks down (catabolism) protein, nitrogenous waste products are formed. These nitrogenous waste products may be too much for the renal system to manage. If someone drastically increases the amount of protein they consume or if they cut out carbohydrate intake, the kidneys may and do fail because of the high levels of nitrogenous waste.
Adding a little protein to your diet by any means is O.K., but be careful not to over do it because your kidneys are at stake.