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.
Increase Dopamine production through the use of dopamine precursors. Dopamine precursors are specific amino acids that our brains utilize to manufacture dopamine. Neurotransmitters are frequently not supplied in great enough levels by our modern diet or in the way our brain best utilizes them.