Peptides stimulate growth hormone and IGF 1 production, promoting angiogenesis and cellular proliferation. In patients with undetected cancers, these peptides can accelerate tumor growth. Conventional imaging misses early cancers. Circulating tumor Colorimetric and visual detection of tyrosine based on its copper catalyzed enzymatic oxidation to dopamine and subsequent reductive formation of colored gold nanoparticles using copper ions Microchimica Acta Springer Nature Link Figure 1 from Engineering of L tyrosine oxidation in Escherichia coli and microbial production of hydroxytyrosol. Semantic Scholar L Tyrosine vs. Dextroamphetamine In a sleep deprivation study, L Tyrosine actually outperformed one of Adderall's active stimulants (dextroamphetamine) in key cognitive tests, like mathematical processing and logical reasoning, even after 30 hours with The Most Powerful Tyrosinase Inhibitors To Lighten Skin Skin Type Solutions Oxidation of tyrosine: Antioxidant mechanism of l DOPA disclosed ScienceDirect