Total parenteral nutrition (TPN). This is total nutrition provided by central vein. clinical trials

Phenylalanine, Methionine and Histidine Requirements in TPN Fed Neonates

This study looks at how much of three important nutrients (phenylalanine, methionine, and histidine) newborn babies fed through a drip actually need. They want to see if current amounts are too high, using breath and urine samples.