Used as a dietary supplement to support cognitive function and mental performance. It serves as a precursor to neurotransmitters like dopamine, norepinephrine, and epinephrine, helping regulate mood, focus, and alertness. Commonly included in nootropic formulations to enhance memory, reduce mental fatigue, and improve concentration under stress. Also investigated for its potential to support thyroid hormone production due to its tyrosine backbone. Stable and more soluble than L-tyrosine, making it a preferred form in some supplements.