Straddling the border between [[../../www/nootropics]] and pharmaceuticals.
Not quite medical-grade pharmacy stuff, not quite nutrients. Somewhere inbetween.
Often precursors to [[../../www-old/neurotransmitter]]s and [[hormones]]. For example [[../../www/l-dopa]] and [[../../www/tyrosine]].
topic:: [[nootropics]] Original note:: [[tyrosine]]