What are the differences between 5-HTP and tryptophan in terms of their effectiveness in promoting serotonin production and overall mood enhancement?

5-HTP is a direct precursor to serotonin, while tryptophan is a building block for 5-HTP. 5-HTP is more effective in promoting serotonin production and mood enhancement compared to tryptophan due to its direct conversion into serotonin in the body.