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.
Dopamine increase with natural herbs, vitamins, and supplements. Dietary supplement products that enhance levels and how to improve sexual health naturally. February 1 2017 by Ray Sahelian, M.D. Benefit of dopamine increase, my personal experience. I have experimented with taking mucuna pruriens herbal extract that contains L-dopa, the precursor to dopamine.