Hi! 5-HTP is an herbal supplement that can boost serotonin levels in the body to help reduce depression.

I found a link in the Mayo Clinic site which has some information about some natural remedies for depression and their possible effectiveness. https://www.mayoclinic.org/diseases-conditions/depression/expert-answers/natural-remedies-for-depression/faq-20058026

HTP=Hydroxytryptophan, It's an amino acid that your body naturally produces. Your body uses it to produce serotonin, a chemical messenger that sends signals between your nerve cells. Low serotonin levels are associated with depression, anxiety, sleep dosorders weight gain and other health problems.