Historically, a human being was not necessarily a natural person in some jurisdictions where a slave was a thing (subject of a property right) rather than a person. In many cases, fundamental human rights are implicitly granted only to natural persons.
Phenylalanine amino acid > Tyrosine amino acid > L-Dopa > Dopamine > Norepinephrine > Epinephrine. Mucuna pruriens is an herb that contains a small percentage of natural L Dopa. Mucuna pruriens is available without a prescription. For more information on mucuna pruriens and levodopa, click on the link provided.
You may want to consider eating more meats, nuts, poultry, and fatty fish (for omega-3s). Keep in mind that eating the optimal amount of healthy protein such as: whey isolate, pasteurized eggs, seaweed, grass-fed beef, and fatty fish has potential to increase L-Tyrosine, and thus dopamine.