* 5 - Hydroxytryptophan (5 - HTP), the direct precursor to Serotonin, is a naturally occurring amino acid that is plant derived. (irwinnaturals.com)
Glyphosate can also easily explain the obesity epidemic and depression through its disruption of the supply of tryptophan, the sole precursor to serotonin. (westonaprice.org)
5 - HTP is best known as an immediate precursor to serotonin — it converts directly to the neurotransmitter in your brain. (instantknockout.com)