Protein is the material basis of life activities and has many physiological functions. Too much and too little intake of protein is not good for health. The requirement of protein is related to the quality of meals. 1985 FAO/WHO proposed that the requirement of protein is 0.75g/kg body weight per day for both men and women, which is for perfect protein (excellent protein).

The dietary composition in China is mainly plant food, and the quality and digestibility in protein are poor. Therefore, the recommended intake for adults in protein is1.16g/(kg d), and that for the elderly is1.27g/(kg d).

Extended data:

Signs of insufficient daily intake of protein;

1, muscle relaxation

Without adequate intake of protein, the body will only break down muscles to ensure their needs, which will lead to weakened muscle tension, decreased muscle mass and weakened joint support. Protein intake is insufficient, and the body needs longer time to repair damaged muscle tissues and joints.

2, a lot of hair loss

"Sparse and dull hair, fragile nails, protruding and dry nails and dry skin are all the first signs of protein's deficiency, because the human body cannot effectively regenerate cells to replace dead cells."

3. Poor immunity

Frequent illness is a sign of poor health of the immune system. Due to insufficient intake of protein, immune cells can't repair and multiply rapidly to fight bacteria.

4, brain fog

Lack of protein or insufficient intake of protein will lead to depression, inattention and decreased mental alertness. These symptoms will be more obvious with similar signs of blood sugar imbalance.

Baidu Encyclopedia-protein Recommended Intake

People's Daily Online-From Hair Loss to Immunodeficiency: Seven Signs of Insufficient protein Intake.