1 / 11Few nutrients are as important as protein. Protein is the building block of your muscles, skin, enzymes and hormones, and it plays an essential role in all body tissues.2 / 11According to the healthline Healthline, an estimated one billion people worldwide suffer from protein deficiency. Most of them are from Central Africa and South Asia. This problem is more common in young children, the elderly and patients.3 / 11- If the beauty of the hair does not last after many attempts and the hair becomes loose, lifeless, then these are the symptoms of protein deficiency.4 / 11- When the body is deficient in protein, the muscles absorb the protein in the bones to meet their needs. This causes the bones to become weak.Muscle requires more energy to spend. It also causes pain in the muscles. 5 / 11- Lack of protein causes constant fatigue. Protein acts as fuel in our body and this is why the body gets energy.6 / 11- If you get sick right away and your immune system is weak, it is also due to lack of protein.7 / 11- Often some people's body suddenly becomes swollen and obese. This may be due to lack of protein. Lack of protein does not get enough energy to the body and which puts extra stress on energy production.8 / 11- If there is no protein in the body, there are many serious diseases including infectious diseases and bacteria-viruses.9 / 11- Lack of protein stops children from growing taller. So be sure to include protein rich foods in your child's diet.10 / 11- Lack of protein slows down the healing process. The effect of blood on the body is affected and the formation of new cells is delayed.11 / 11How much protein is needed? - According to the Healthline website, the body needs protein according to everyone's needs. For example, body weight, physical activity, age, etc. Research has shown that the elderly and athletes need protein the most.