Introduction: Due to low solubility of the (semi-)essential amino acids Tyrosine (Tyr ... on TPN were studied on day 7 of life. Group A (n=5, birthweight 1.41±0.32 kg, gest.

Tyrosine supplementation can be found in its free form. It can also be found as N-acetyl L-Tyrosine (NALT). The conversion rate of NALT to tyrosine is lower so some may take higher doses of NALT.