Nutrition · Module 5 · Proteins and amino acids

Proteins Lab

Run a protein turnover simulator, solve the complementary protein puzzle, practise protein calculations with animated worked solutions, sort the big ideas and work through real-life cases. Nothing here is graded.

Part 1: Protein Turnover Simulator

Food protein and recycled body protein feed the amino acid pool. Extra nitrogen leaves as urea.
Amino acids (from food and recycling) Body proteins Nitrogen in Nitrogen out (urea) Positive balance Negative balance
Live readouts
MeasureValue

A teaching model, not a personal prescription. It treats about 0.66 g/kg per day as the protein a healthy adult loses and must replace, raises losses in illness and when energy intake is low, and lets growth or strength training add new body protein when energy is adequate. Extra protein beyond that is deaminated, so it raises nitrogen out, not body protein. One simulated day passes each second. Energy needs are a rough population estimate (about 30 kcal per kg) used only to show protein as a percent of calories.