5-HTP for Serotonin: Therapeutic administration of 5-HTP has been shown to be effective in treating a wide variety of conditions, including depression, fibromyalgia, binge eating associated with obesity, chronic headaches, and insomnia. https://pubmed.ncbi.nlm.nih.gov/9727088/
5-HTP and Depression: Repeated-measures analysis revealed a significant improvement of depressive symptoms during the 50-mg 5-HTP treatment compared with placebo as assessed by the Hamilton Depression Rating Scale. https://onlinelibrary.wiley.com/doi/10.1111/ene.14179
5-HTP for Sleep: Treatment with L -5-hydroxytryptophan can modulate children's arousal level and induce a long-term improvement of sleep terrors. https://pubmed.ncbi.nlm.nih.gov/15146330/
5-HTP and Anxiety: A significant anxiety reduction was observed on three different anxiety scales. It is suggested that 5-HT systems may be involved in anxiety mediation.
https://pubmed.ncbi.nlm.nih.gov/3157732/
5-HTP and Obesity: Significant weight loss was observed in 5-HTP-treated patients. A reduction in carbohydrate intake and a consistent presence of early satiety were also found. Together with the good tolerance observed, these findings suggest that 5-HTP may be safely used to treat obesity. https://pubmed.ncbi.nlm.nih.gov/1384305/