Can calculated total nitrogen replace Kjeldahl total nitrogen measurements in 24-h urine samples?

What is it about?

Total nitrogen in 24-hour (hr) urine samples is the most well-known biomarker of the validity of dietary assessments. Currently, total nitrogen is measured in 24-hr urine samples. This study concludes that total nitrogen in 24-hr urine samples can be calculated, as an alternative to the labour-intensive Kjeldahl method.

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