Hunger
This one might seem obvious. Protein fuels you. It’s one of three sources of calories, along with carbs and fats. If you want to eat a lot of the time even though you have regular meals, you may need more protein. Studies have found that eating foods with protein helps you feel fuller throughout the day.
Slow-Healing Injuries
People who are low on protein often find their cuts and scrapes take longer to get better. The same seems to be true of sprains and other exercise-related mishaps. It could be another effect of your body not making enough collagen. It’s found in connective tissues as well as your skin. To make blood clot, you need proteins, too.