Serotonin Support

These 5-HTP supplements are the precursors of serotonin and are available in both 50 mg and 100 mg. I generally recommend that you start low and work up.

5-HTP 50 mg 120 vcaps by Metabolic Maintenance

5-HTP 100 mg 90 vcaps by Protocol For Life Balance

These are Tryptophan supplements. I find Tryptophan most useful for sleep. Take 1 or 2 before bed on an empty stomach.
L-Tryptophan 500 mg 120 vcaps by Protocol For Life Balance