Nutrition question


Am really struggling with this assignment and would really appreciate if someone could look at my answer below and tell me what am doing wrong. Thank you so much in advance.

Patient energy requirement is 2100 kcalories per day, with 50% of kcal from carbohydrates, 30% kcal from lipids, and 20% kcal from amino acids. This needs to be administered within 1500 mL of a total nutrient admixture (TNA) solution.

Determine the composition of the TNA solution.

a) What concentration dextrose solution would you use and at what volume?

b) What concentration amino acid solution would you use and at what volume?

c) What percentage solution of a lipid emulsion would you use and at what volume?

Show your work!


  • Dextrose solutions are available in concentrations between 2.5 and 70%.
  • Dextrose monohydrate provides 3.4 kcal/g
  • Amino acid concentrations range from 3.5 to 15%.
  • Amino acids provide 4 kcal/g
  • Lipid emulsions are available in 10, 20, 30% solutions.
  • 10% lipid emulsion contain 1.1 kcal/mL; 20% lipid emulsion contain 2.0 kcal/mL; 30% lipid emulsion contain 3.0 kcal/mL

a) 50%/1500ml = 750ml

50g/100ml x 750 ml = 375g of dextrose

b) 20%/1500ml = 300ml

20g/100ml x 300ml = 60 g of amino acids

c) 10%/1500ml = 150ml

10g/100ml x 150ml = 15 g of lipid emulsion

This topic is now closed to further replies.