L-Tyrosine is an amino acid used to produce noradrenaline and dopamine. It is one of the 22 amino acids used by cells to synthesize proteins.
N-Acetyl L-Tyrosine (NALT) is a modified version of the amino acid. The N-terminal has been acetylated, which increases its solubility, and ability to pass membranes in the body. NALT is 20 times more water soluble than L-Tyrosine. Many people report improved mood and focus effects from NALT compared to L-Tyrosine.