Protein is a very important part of our diets. It provides amino acids that are the building blocks for the human body. It is very important for healthy bones, teeth, muscles, brain, basically everything!
So, what if I don't get enough protein? Well, it can lead to fatigue, swelling, and a lack of appetite. You might think a lack of appetite is a good thing. WRONG! Your body tells you that you are hungry for a reason. Your body knows when you need to eat to replenish your blood sugar as well as to keep your metabolism going. You do have to fuel your body for it to work properly.
An average female should intake 20-70g of protein a day. Indoor Climbing has a great calculator for protein intake depending on your height. The average male should intake 21-78g of protein a day. What are you supposed to intake if you are pregnant? If you are pregnant, you should intake 80-100g a day.
Now you may wonder what foods contain protein. You may be surprised how little is contained in certain foods. The highest source of protein is definitely in meats & fish. Here is a printable protein counter that you can use for a reference. There is another here that lists them in order most to least.