I got these for my daughter and tried one yesterday myself, wow I really did have allot of energy it was sorta like the adderal I used to take but more of Metabolic phenotypes: Molecular bridges between health homeostasis and disease imbalance Computational and Structural Biotechnology Journal So is it better to take l tyrosine with vitamin C, D, niacin etc for its conversion into l dopa? : r Nootropics Optimization of pre enrichment strategies for mouse hematopoietic stem cell isolation and metabolomic analysis Experimental Hematology