<prompt> A person on total parenteral nutrition was given 62.5 g of protein. Calculate the amount of nitrogen present in this amount of protein.32 g6.25 g10 g100 g  <response>: Approximately, Nitrogen contributes to 16 of proteins 100 gm of protein contains 16 gm of nitrogen. So, 62.5 gm of protein will contain, 62.5 X 16100 gm of nitrogen, i.e. 10 gm of nitrogen. Extra Edge: Formula for calculating the nitrogen balance of patients: Nitrogen balance Nitrogen intake - Nitrogen loss Protein intake x 0.16 - 24-hour urinary urea nitrogen 4 Why to add 4? 4 gm of nitrogen is lost through other sources. 