![](https://giornaleitalianodinefrologia.it/wp-content/uploads/sites/3/2018/01/fig-4.jpg?x85047)
fig 4
Figure 4. Changes in blood urea level of a patient with nephritis at various levels of dietary protein intake. The numbers at the bottom represent the protein intake in gm/day; the +20 reflects the baseline protein intake of 105 gm/day plus 20 gm of urea drunk in solution (Chart constructed from data provided in reference #37).