[Method of calculating endogenous protein losses by the human body].

Investigations conducted with participation of 30 examinees in whom the state of proteinic deficiency or protein fasting was provoked by different protein content in their diets a general regularity in the nature of passage of total nitrogen with urine, faces and summarily through other routes was educed and described mathematically. The endogenous excretion of total nitrogen with urine in young males was found to comprise 2.5 +/- 0.08, with feces--0.75 +/- 0.03 and summarily via other routes--0.59 +/- 0.36 g per day. The mentioned results correlated closely enough with corresponding figures in pertinent literature sources.