Evaluation of human protein nutritional status indicators mainly include serum protein, serum amino acid ratio, upper arm muscle circumference and upper arm muscle area.
1. Serum protein mainly includes serum albumin, ferritin, prealbumin, retinoid-binding protein and total serum protein, which will be lower than normal when malnutrition occurs.
2. serum amino acid ratio <2 for normal, >3 for protein malnutrition, human protein malnutrition, because of adaptive metabolism will make the serum free amino acid pattern change, manifested in the body of essential amino acids, such as isoleucine, methionine, lysine, etc., on the contrary, the body of non-essential amino acid content is normal or increased, such as serine, etc..
3. Upper arm muscle circumference and upper arm muscle area are also used as supplementary parameters to evaluate the protein nutritional status indicators of the human body. Generally speaking, these two indicators can be calculated by measuring the circumference at the midpoint and the thickness of the skin fold of the triceps muscle, which is generally standardized at 25.3cm for men and 23.2cm for women.
If the examination finds that the relevant indicators are abnormal, you should consult a doctor in time.