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.
L-Dopa is also highly effective at boosting overall brain function. Dopamine itself is known to be involved in the regulation of mood, attention and movement. Many users of L-Dopa drugs or herbal supplements such as Mucuna Pruriens report improvements to their mood and mental outlook when taking this supplement.