Melatonin for sleep and, last,
Tyrosine for your weepy moods(Tyrosine is the precursor of three most essential Neurotransmitters during stressful conditions, and they are Dopamine, Epinephrine
and Nor Epinephrine
. These are the basis of elevating mood and concentration.)
Whilst your pineal gland needs serotonin with which to create melatonin, research suggests taking both serotonin and melatonin is helpful when you have depression, moods, trouble sleeping, etc.